PythonModels/systems/test_mql_closure.py

@@ -1770,40 +1770,121 @@ class TestMqlPn3P4NodeChamberSegmentClosure:
             connected_h=connected_h,
         )
 
-    def _write_port_states(
+    def _write_fixed_chamber_segment(
         self,
-        snapshot: TestMqlPn3P4NodeChamberSegmentSnapshot,
+        *,
+        spec: TestMqlPneumaticChamberSegmentSpec,
+        chamber: AmesimPneumaticVolume,
+        chamber_properties: ThermodynamicProperties,
+        inlet_line: AmesimPnl0001Pipe,
+        inlet_line_properties: ThermodynamicProperties,
+        inlet_node_properties: ThermodynamicProperties,
+        inlet_node_to_line_flow: float,
+        inlet_line_to_chamber_flow: float,
+        inlet_orifice: AmesimPneumaticOrifice,
+        outlet_line: AmesimPnl0001Pipe,
+        outlet_line_properties: ThermodynamicProperties,
+        outlet_node_properties: ThermodynamicProperties,
+        outlet_node_to_line_flow: float,
+        outlet_line_to_chamber_flow: float,
+        outlet_orifice: AmesimPneumaticOrifice,
     ) -> None:
-        spec = self.components.spec
-        chamber = self.components.volume
         chamber_inlet_port = self._port(chamber, spec.volume_inlet_port)
         chamber_outlet_port = self._port(chamber, spec.volume_outlet_port)
 
         TestMqlPnl0001PairChamberSegmentClosure._write_line_side(
             self,
-            line=self.components.inlet_line,
+            line=inlet_line,
-            line_properties=snapshot.inlet_line,
+            line_properties=inlet_line_properties,
-            node_properties=snapshot.p4_port3_remote_orifice_line_port_1,
+            node_properties=inlet_node_properties,
-            node_to_line_flow=snapshot.inlet_node_to_line_flow,
+            node_to_line_flow=inlet_node_to_line_flow,
-            line_to_chamber_flow=snapshot.inlet_line_to_chamber_flow,
+            line_to_chamber_flow=inlet_line_to_chamber_flow,
-            orifice=self.components.inlet_orifice,
+            orifice=inlet_orifice,
             orifice_boundary_port=spec.inlet_orifice_boundary_port,
             orifice_volume_port=spec.inlet_orifice_volume_port,
             chamber_port=chamber_inlet_port,
-            chamber_properties=snapshot.chamber,
+            chamber_properties=chamber_properties,
         )
         TestMqlPnl0001PairChamberSegmentClosure._write_line_side(
             self,
-            line=self.components.outlet_line,
+            line=outlet_line,
-            line_properties=snapshot.outlet_line,
+            line_properties=outlet_line_properties,
-            node_properties=snapshot.node_line_port_1,
+            node_properties=outlet_node_properties,
-            node_to_line_flow=snapshot.outlet_node_to_line_flow,
+            node_to_line_flow=outlet_node_to_line_flow,
-            line_to_chamber_flow=snapshot.outlet_line_to_chamber_flow,
+            line_to_chamber_flow=outlet_line_to_chamber_flow,
-            orifice=self.components.outlet_orifice,
+            orifice=outlet_orifice,
             orifice_boundary_port=spec.outlet_orifice_boundary_port,
             orifice_volume_port=spec.outlet_orifice_volume_port,
             chamber_port=chamber_outlet_port,
+            chamber_properties=chamber_properties,
+        )
+
+    def _fixed_chamber_segment_derivatives(
+        self,
+        *,
+        spec: TestMqlPneumaticChamberSegmentSpec,
+        chamber: AmesimPneumaticVolume,
+        chamber_properties: ThermodynamicProperties,
+        inlet_line: AmesimPnl0001Pipe,
+        inlet_line_properties: ThermodynamicProperties,
+        inlet_connected_properties: ThermodynamicProperties,
+        inlet_node_to_line_flow: float,
+        inlet_line_to_chamber_flow: float,
+        outlet_line: AmesimPnl0001Pipe,
+        outlet_line_properties: ThermodynamicProperties,
+        outlet_connected_properties: ThermodynamicProperties,
+        outlet_node_to_line_flow: float,
+        outlet_line_to_chamber_flow: float,
+    ) -> tuple[VolumeState, VolumeState, VolumeState]:
+        inlet_derivative = inlet_line.derivatives_from_connections(
+            port_1_m_flow=inlet_node_to_line_flow,
+            connected_h_1=inlet_connected_properties.h,
+            port_2_m_flow=-inlet_line_to_chamber_flow,
+            connected_h_2=chamber_properties.h,
+        )
+        chamber_derivative = chamber.derivatives_from_two_connections(
+            port_a_m_flow=self._port(chamber, "port_1").m_flow,
+            connected_h_a=(
+                inlet_line_properties.h
+                if spec.volume_inlet_port == "port_1"
+                else outlet_line_properties.h
+            ),
+            port_b_m_flow=self._port(chamber, "port_2").m_flow,
+            connected_h_b=(
+                inlet_line_properties.h
+                if spec.volume_inlet_port == "port_2"
+                else outlet_line_properties.h
+            ),
+            internal_h=chamber_properties.h,
+        )
+        outlet_derivative = outlet_line.derivatives_from_connections(
+            port_1_m_flow=outlet_node_to_line_flow,
+            connected_h_1=outlet_connected_properties.h,
+            port_2_m_flow=-outlet_line_to_chamber_flow,
+            connected_h_2=chamber_properties.h,
+        )
+        return inlet_derivative, chamber_derivative, outlet_derivative
+
+    def _write_port_states(
+        self,
+        snapshot: TestMqlPn3P4NodeChamberSegmentSnapshot,
+    ) -> None:
+        self._write_fixed_chamber_segment(
+            spec=self.components.spec,
+            chamber=self.components.volume,
             chamber_properties=snapshot.chamber,
+            inlet_line=self.components.inlet_line,
+            inlet_line_properties=snapshot.inlet_line,
+            inlet_node_properties=snapshot.p4_port3_remote_orifice_line_port_1,
+            inlet_node_to_line_flow=snapshot.inlet_node_to_line_flow,
+            inlet_line_to_chamber_flow=snapshot.inlet_line_to_chamber_flow,
+            inlet_orifice=self.components.inlet_orifice,
+            outlet_line=self.components.outlet_line,
+            outlet_line_properties=snapshot.outlet_line,
+            outlet_node_properties=snapshot.node_line_port_1,
+            outlet_node_to_line_flow=snapshot.outlet_node_to_line_flow,
+            outlet_line_to_chamber_flow=snapshot.outlet_line_to_chamber_flow,
+            outlet_orifice=self.components.outlet_orifice,
         )
 
         node_line = self.components.node_line
@@ -1980,57 +2061,42 @@ class TestMqlPn3P4NodeChamberSegmentClosure:
         p4_port1_next_orifice_resistance_orifice.port_b.m_flow = -snapshot.p4_port1_next_orifice_resistance_to_p4_flow
         p4_port1_next_orifice_resistance_orifice.port_b.h_outflow = snapshot.p4_port1_far_primary_line.h
 
-        resistance_chamber_spec = (
+        self._write_fixed_chamber_segment(
-            self.components.p4_port1_next_orifice_resistance_chamber_spec
+            spec=self.components.p4_port1_next_orifice_resistance_chamber_spec,
-        )
+            chamber=self.components.p4_port1_next_orifice_resistance_chamber,
-        p4_port1_next_orifice_resistance_chamber = (
+            chamber_properties=snapshot.p4_port1_next_orifice_resistance_chamber,
-            self.components.p4_port1_next_orifice_resistance_chamber
+            inlet_line=self.components.p4_port1_next_orifice_resistance_chamber_inlet_line,
-        )
+            inlet_line_properties=(
-        p4_port1_next_orifice_resistance_chamber_inlet_port = self._port(
-            p4_port1_next_orifice_resistance_chamber,
-            resistance_chamber_spec.volume_inlet_port,
-        )
-        p4_port1_next_orifice_resistance_chamber_outlet_port = self._port(
-            p4_port1_next_orifice_resistance_chamber,
-            resistance_chamber_spec.volume_outlet_port,
-        )
-        TestMqlPnl0001PairChamberSegmentClosure._write_line_side(
-            self,
-            line=self.components.p4_port1_next_orifice_resistance_chamber_inlet_line,
-            line_properties=(
                 snapshot.p4_port1_next_orifice_resistance_chamber_inlet_line
             ),
-            node_properties=snapshot.p4_port1_remote_orifice_line_port_1,
+            inlet_node_properties=snapshot.p4_port1_remote_orifice_line_port_1,
-            node_to_line_flow=(
+            inlet_node_to_line_flow=(
                 snapshot.p4_port1_next_orifice_resistance_chamber_inlet_node_to_line_flow
             ),
-            line_to_chamber_flow=(
+            inlet_line_to_chamber_flow=(
                 snapshot.p4_port1_next_orifice_resistance_chamber_inlet_line_to_chamber_flow
             ),
-            orifice=self.components.p4_port1_next_orifice_resistance_chamber_inlet_orifice,
+            inlet_orifice=(
-            orifice_boundary_port=resistance_chamber_spec.inlet_orifice_boundary_port,
+                self.components.p4_port1_next_orifice_resistance_chamber_inlet_orifice
-            orifice_volume_port=resistance_chamber_spec.inlet_orifice_volume_port,
+            ),
-            chamber_port=p4_port1_next_orifice_resistance_chamber_inlet_port,
+            outlet_line=(
-            chamber_properties=snapshot.p4_port1_next_orifice_resistance_chamber,
+                self.components.p4_port1_next_orifice_resistance_chamber_outlet_line
-        )
+            ),
-        TestMqlPnl0001PairChamberSegmentClosure._write_line_side(
+            outlet_line_properties=(
-            self,
-            line=self.components.p4_port1_next_orifice_resistance_chamber_outlet_line,
-            line_properties=(
                 snapshot.p4_port1_next_orifice_resistance_chamber_outlet_line
             ),
-            node_properties=snapshot.p4_port1_next_orifice_resistance_line_port_1,
+            outlet_node_properties=(
-            node_to_line_flow=(
+                snapshot.p4_port1_next_orifice_resistance_line_port_1
+            ),
+            outlet_node_to_line_flow=(
                 snapshot.p4_port1_next_orifice_resistance_chamber_outlet_node_to_line_flow
             ),
-            line_to_chamber_flow=(
+            outlet_line_to_chamber_flow=(
                 snapshot.p4_port1_next_orifice_resistance_chamber_outlet_line_to_chamber_flow
             ),
-            orifice=self.components.p4_port1_next_orifice_resistance_chamber_outlet_orifice,
+            outlet_orifice=(
-            orifice_boundary_port=resistance_chamber_spec.outlet_orifice_boundary_port,
+                self.components.p4_port1_next_orifice_resistance_chamber_outlet_orifice
-            orifice_volume_port=resistance_chamber_spec.outlet_orifice_volume_port,
+            ),
-            chamber_port=p4_port1_next_orifice_resistance_chamber_outlet_port,
-            chamber_properties=snapshot.p4_port1_next_orifice_resistance_chamber,
         )
 
         p4_bridge_primary_line = self.components.p4_bridge_primary_line
@@ -2175,41 +2241,30 @@ class TestMqlPn3P4NodeChamberSegmentClosure:
         p4_port3_next_orifice_output_line.port_2.m_flow = -snapshot.p4_port3_next_orifice_output_to_p4_flow
         p4_port3_next_orifice_output_line.port_2.h_outflow = snapshot.p4_port3_next_orifice_output_line.h
 
-        chamber_spec = self.components.p4_port3_next_chamber_spec
+        self._write_fixed_chamber_segment(
-        p4_port3_next_chamber = self.components.p4_port3_next_chamber
+            spec=self.components.p4_port3_next_chamber_spec,
-        p4_port3_next_chamber_inlet_port = self._port(
+            chamber=self.components.p4_port3_next_chamber,
-            p4_port3_next_chamber,
-            chamber_spec.volume_inlet_port,
-        )
-        p4_port3_next_chamber_outlet_port = self._port(
-            p4_port3_next_chamber,
-            chamber_spec.volume_outlet_port,
-        )
-        TestMqlPnl0001PairChamberSegmentClosure._write_line_side(
-            self,
-            line=self.components.p4_port3_next_chamber_inlet_line,
-            line_properties=snapshot.p4_port3_next_chamber_inlet_line,
-            node_properties=snapshot.p4_port3_next_orifice_line_port_1,
-            node_to_line_flow=snapshot.p4_port3_next_chamber_inlet_node_to_line_flow,
-            line_to_chamber_flow=snapshot.p4_port3_next_chamber_inlet_line_to_chamber_flow,
-            orifice=self.components.p4_port3_next_chamber_inlet_orifice,
-            orifice_boundary_port=chamber_spec.inlet_orifice_boundary_port,
-            orifice_volume_port=chamber_spec.inlet_orifice_volume_port,
-            chamber_port=p4_port3_next_chamber_inlet_port,
-            chamber_properties=snapshot.p4_port3_next_chamber,
-        )
-        TestMqlPnl0001PairChamberSegmentClosure._write_line_side(
-            self,
-            line=self.components.p4_port3_next_chamber_outlet_line,
-            line_properties=snapshot.p4_port3_next_chamber_outlet_line,
-            node_properties=snapshot.p4_port3_remote_resistance_node_line_port_1,
-            node_to_line_flow=snapshot.p4_port3_next_chamber_outlet_node_to_line_flow,
-            line_to_chamber_flow=snapshot.p4_port3_next_chamber_outlet_line_to_chamber_flow,
-            orifice=self.components.p4_port3_next_chamber_outlet_orifice,
-            orifice_boundary_port=chamber_spec.outlet_orifice_boundary_port,
-            orifice_volume_port=chamber_spec.outlet_orifice_volume_port,
-            chamber_port=p4_port3_next_chamber_outlet_port,
             chamber_properties=snapshot.p4_port3_next_chamber,
+            inlet_line=self.components.p4_port3_next_chamber_inlet_line,
+            inlet_line_properties=snapshot.p4_port3_next_chamber_inlet_line,
+            inlet_node_properties=snapshot.p4_port3_next_orifice_line_port_1,
+            inlet_node_to_line_flow=(
+                snapshot.p4_port3_next_chamber_inlet_node_to_line_flow
+            ),
+            inlet_line_to_chamber_flow=(
+                snapshot.p4_port3_next_chamber_inlet_line_to_chamber_flow
+            ),
+            inlet_orifice=self.components.p4_port3_next_chamber_inlet_orifice,
+            outlet_line=self.components.p4_port3_next_chamber_outlet_line,
+            outlet_line_properties=snapshot.p4_port3_next_chamber_outlet_line,
+            outlet_node_properties=snapshot.p4_port3_remote_resistance_node_line_port_1,
+            outlet_node_to_line_flow=(
+                snapshot.p4_port3_next_chamber_outlet_node_to_line_flow
+            ),
+            outlet_line_to_chamber_flow=(
+                snapshot.p4_port3_next_chamber_outlet_line_to_chamber_flow
+            ),
+            outlet_orifice=self.components.p4_port3_next_chamber_outlet_orifice,
         )
 
         p4_port3_next_orifice_resistance = self.components.p4_port3_next_orifice_resistance
@@ -2244,49 +2299,38 @@ class TestMqlPn3P4NodeChamberSegmentClosure:
         p4_port3_next_resistance_output_line.port_2.m_flow = -snapshot.p4_port3_next_resistance_output_to_p4_flow
         p4_port3_next_resistance_output_line.port_2.h_outflow = snapshot.p4_port3_next_resistance_output_line.h
 
-        resistance_chamber_spec = self.components.p4_port3_next_resistance_chamber_spec
+        self._write_fixed_chamber_segment(
-        p4_port3_next_resistance_chamber = self.components.p4_port3_next_resistance_chamber
+            spec=self.components.p4_port3_next_resistance_chamber_spec,
-        p4_port3_next_resistance_chamber_inlet_port = self._port(
+            chamber=self.components.p4_port3_next_resistance_chamber,
-            p4_port3_next_resistance_chamber,
+            chamber_properties=snapshot.p4_port3_next_resistance_chamber,
-            resistance_chamber_spec.volume_inlet_port,
+            inlet_line=self.components.p4_port3_next_resistance_chamber_inlet_line,
-        )
+            inlet_line_properties=(
-        p4_port3_next_resistance_chamber_outlet_port = self._port(
+                snapshot.p4_port3_next_resistance_chamber_inlet_line
-            p4_port3_next_resistance_chamber,
+            ),
-            resistance_chamber_spec.volume_outlet_port,
+            inlet_node_properties=snapshot.p4_port1_next_orifice_line_port_1,
-        )
+            inlet_node_to_line_flow=(
-        TestMqlPnl0001PairChamberSegmentClosure._write_line_side(
-            self,
-            line=self.components.p4_port3_next_resistance_chamber_inlet_line,
-            line_properties=snapshot.p4_port3_next_resistance_chamber_inlet_line,
-            node_properties=snapshot.p4_port1_next_orifice_line_port_1,
-            node_to_line_flow=(
                 snapshot.p4_port3_next_resistance_chamber_inlet_node_to_line_flow
             ),
-            line_to_chamber_flow=(
+            inlet_line_to_chamber_flow=(
                 snapshot.p4_port3_next_resistance_chamber_inlet_line_to_chamber_flow
             ),
-            orifice=self.components.p4_port3_next_resistance_chamber_inlet_orifice,
+            inlet_orifice=(
-            orifice_boundary_port=resistance_chamber_spec.inlet_orifice_boundary_port,
+                self.components.p4_port3_next_resistance_chamber_inlet_orifice
-            orifice_volume_port=resistance_chamber_spec.inlet_orifice_volume_port,
+            ),
-            chamber_port=p4_port3_next_resistance_chamber_inlet_port,
+            outlet_line=self.components.p4_port3_next_resistance_chamber_outlet_line,
-            chamber_properties=snapshot.p4_port3_next_resistance_chamber,
+            outlet_line_properties=(
-        )
+                snapshot.p4_port3_next_resistance_chamber_outlet_line
-        TestMqlPnl0001PairChamberSegmentClosure._write_line_side(
+            ),
-            self,
+            outlet_node_properties=snapshot.p4_port3_next_resistance_node_line_port_1,
-            line=self.components.p4_port3_next_resistance_chamber_outlet_line,
+            outlet_node_to_line_flow=(
-            line_properties=snapshot.p4_port3_next_resistance_chamber_outlet_line,
-            node_properties=snapshot.p4_port3_next_resistance_node_line_port_1,
-            node_to_line_flow=(
                 snapshot.p4_port3_next_resistance_chamber_outlet_node_to_line_flow
             ),
-            line_to_chamber_flow=(
+            outlet_line_to_chamber_flow=(
                 snapshot.p4_port3_next_resistance_chamber_outlet_line_to_chamber_flow
             ),
-            orifice=self.components.p4_port3_next_resistance_chamber_outlet_orifice,
+            outlet_orifice=(
-            orifice_boundary_port=resistance_chamber_spec.outlet_orifice_boundary_port,
+                self.components.p4_port3_next_resistance_chamber_outlet_orifice
-            orifice_volume_port=resistance_chamber_spec.outlet_orifice_volume_port,
+            ),
-            chamber_port=p4_port3_next_resistance_chamber_outlet_port,
-            chamber_properties=snapshot.p4_port3_next_resistance_chamber,
         )
 
         p4_port3_remote_orifice_line = self.components.p4_port3_remote_orifice_line
@@ -2621,40 +2665,34 @@ class TestMqlPn3P4NodeChamberSegmentClosure:
                 connected_h_2=snapshot.p4_port3_next_primary_line.h,
             )
         )
-        p4_port3_next_chamber_inlet_derivative = (
+        (
-            self.components.p4_port3_next_chamber_inlet_line.derivatives_from_connections(
+            p4_port3_next_chamber_inlet_derivative,
-                port_1_m_flow=snapshot.p4_port3_next_chamber_inlet_node_to_line_flow,
+            p4_port3_next_fixed_chamber_derivative,
-                connected_h_1=snapshot.p4_port3_next_orifice_line_port_1.h,
+            p4_port3_next_chamber_outlet_derivative,
-                port_2_m_flow=-snapshot.p4_port3_next_chamber_inlet_line_to_chamber_flow,
+        ) = self._fixed_chamber_segment_derivatives(
-                connected_h_2=snapshot.p4_port3_next_chamber.h,
+            spec=self.components.p4_port3_next_chamber_spec,
-            )
+            chamber=self.components.p4_port3_next_chamber,
-        )
+            chamber_properties=snapshot.p4_port3_next_chamber,
-        p4_port3_next_chamber_spec = self.components.p4_port3_next_chamber_spec
+            inlet_line=self.components.p4_port3_next_chamber_inlet_line,
-        p4_port3_next_chamber = self.components.p4_port3_next_chamber
+            inlet_line_properties=snapshot.p4_port3_next_chamber_inlet_line,
-        p4_port3_next_fixed_chamber_derivative = (
+            inlet_connected_properties=snapshot.p4_port3_next_orifice_line_port_1,
-            p4_port3_next_chamber.derivatives_from_two_connections(
+            inlet_node_to_line_flow=(
-                port_a_m_flow=self._port(p4_port3_next_chamber, "port_1").m_flow,
+                snapshot.p4_port3_next_chamber_inlet_node_to_line_flow
-                connected_h_a=(
+            ),
-                    snapshot.p4_port3_next_chamber_inlet_line.h
+            inlet_line_to_chamber_flow=(
-                    if p4_port3_next_chamber_spec.volume_inlet_port == "port_1"
+                snapshot.p4_port3_next_chamber_inlet_line_to_chamber_flow
-                    else snapshot.p4_port3_next_chamber_outlet_line.h
+            ),
-                ),
+            outlet_line=self.components.p4_port3_next_chamber_outlet_line,
-                port_b_m_flow=self._port(p4_port3_next_chamber, "port_2").m_flow,
+            outlet_line_properties=snapshot.p4_port3_next_chamber_outlet_line,
-                connected_h_b=(
+            outlet_connected_properties=(
-                    snapshot.p4_port3_next_chamber_inlet_line.h
+                snapshot.p4_port3_remote_resistance_node_line_port_1
-                    if p4_port3_next_chamber_spec.volume_inlet_port == "port_2"
+            ),
-                    else snapshot.p4_port3_next_chamber_outlet_line.h
+            outlet_node_to_line_flow=(
-                ),
+                snapshot.p4_port3_next_chamber_outlet_node_to_line_flow
-                internal_h=snapshot.p4_port3_next_chamber.h,
+            ),
-            )
+            outlet_line_to_chamber_flow=(
-        )
+                snapshot.p4_port3_next_chamber_outlet_line_to_chamber_flow
-        p4_port3_next_chamber_outlet_derivative = (
+            ),
-            self.components.p4_port3_next_chamber_outlet_line.derivatives_from_connections(
-                port_1_m_flow=snapshot.p4_port3_next_chamber_outlet_node_to_line_flow,
-                connected_h_1=snapshot.p4_port3_remote_resistance_node_line_port_1.h,
-                port_2_m_flow=-snapshot.p4_port3_next_chamber_outlet_line_to_chamber_flow,
-                connected_h_2=snapshot.p4_port3_next_chamber.h,
-            )
         )
         (
             p4_port3_next_resistance_derivative_1,
@@ -2673,48 +2711,36 @@ class TestMqlPn3P4NodeChamberSegmentClosure:
                 connected_h_2=snapshot.p4_bridge_primary_line.h,
             )
         )
-        p4_port3_next_resistance_chamber_inlet_derivative = (
+        (
-            self.components.p4_port3_next_resistance_chamber_inlet_line.derivatives_from_connections(
+            p4_port3_next_resistance_chamber_inlet_derivative,
-                port_1_m_flow=snapshot.p4_port3_next_resistance_chamber_inlet_node_to_line_flow,
+            p4_port3_next_resistance_fixed_chamber_derivative,
-                connected_h_1=snapshot.p4_port1_next_orifice_line_port_1.h,
+            p4_port3_next_resistance_chamber_outlet_derivative,
-                port_2_m_flow=(
+        ) = self._fixed_chamber_segment_derivatives(
-                    -snapshot.p4_port3_next_resistance_chamber_inlet_line_to_chamber_flow
+            spec=self.components.p4_port3_next_resistance_chamber_spec,
-                ),
+            chamber=self.components.p4_port3_next_resistance_chamber,
-                connected_h_2=snapshot.p4_port3_next_resistance_chamber.h,
+            chamber_properties=snapshot.p4_port3_next_resistance_chamber,
-            )
+            inlet_line=self.components.p4_port3_next_resistance_chamber_inlet_line,
-        )
+            inlet_line_properties=(
-        p4_port3_next_resistance_chamber_spec = (
+                snapshot.p4_port3_next_resistance_chamber_inlet_line
-            self.components.p4_port3_next_resistance_chamber_spec
+            ),
-        )
+            inlet_connected_properties=snapshot.p4_port1_next_orifice_line_port_1,
-        p4_port3_next_resistance_chamber = (
+            inlet_node_to_line_flow=(
-            self.components.p4_port3_next_resistance_chamber
+                snapshot.p4_port3_next_resistance_chamber_inlet_node_to_line_flow
-        )
+            ),
-        p4_port3_next_resistance_fixed_chamber_derivative = (
+            inlet_line_to_chamber_flow=(
-            p4_port3_next_resistance_chamber.derivatives_from_two_connections(
+                snapshot.p4_port3_next_resistance_chamber_inlet_line_to_chamber_flow
-                port_a_m_flow=self._port(p4_port3_next_resistance_chamber, "port_1").m_flow,
+            ),
-                connected_h_a=(
+            outlet_line=self.components.p4_port3_next_resistance_chamber_outlet_line,
-                    snapshot.p4_port3_next_resistance_chamber_inlet_line.h
+            outlet_line_properties=(
-                    if p4_port3_next_resistance_chamber_spec.volume_inlet_port == "port_1"
+                snapshot.p4_port3_next_resistance_chamber_outlet_line
-                    else snapshot.p4_port3_next_resistance_chamber_outlet_line.h
+            ),
-                ),
+            outlet_connected_properties=snapshot.p4_port3_next_resistance_node_line_port_1,
-                port_b_m_flow=self._port(p4_port3_next_resistance_chamber, "port_2").m_flow,
+            outlet_node_to_line_flow=(
-                connected_h_b=(
+                snapshot.p4_port3_next_resistance_chamber_outlet_node_to_line_flow
-                    snapshot.p4_port3_next_resistance_chamber_inlet_line.h
+            ),
-                    if p4_port3_next_resistance_chamber_spec.volume_inlet_port == "port_2"
+            outlet_line_to_chamber_flow=(
-                    else snapshot.p4_port3_next_resistance_chamber_outlet_line.h
+                snapshot.p4_port3_next_resistance_chamber_outlet_line_to_chamber_flow
-                ),
+            ),
-                internal_h=snapshot.p4_port3_next_resistance_chamber.h,
-            )
-        )
-        p4_port3_next_resistance_chamber_outlet_derivative = (
-            self.components.p4_port3_next_resistance_chamber_outlet_line.derivatives_from_connections(
-                port_1_m_flow=snapshot.p4_port3_next_resistance_chamber_outlet_node_to_line_flow,
-                connected_h_1=snapshot.p4_port3_next_resistance_node_line_port_1.h,
-                port_2_m_flow=(
-                    -snapshot.p4_port3_next_resistance_chamber_outlet_line_to_chamber_flow
-                ),
-                connected_h_2=snapshot.p4_port3_next_resistance_chamber.h,
-            )
         )
         (
             p4_port1_next_orifice_derivative_1,
@@ -2742,60 +2768,42 @@ class TestMqlPn3P4NodeChamberSegmentClosure:
             port_2_m_flow=-snapshot.p4_port1_next_orifice_resistance_to_p4_flow,
             connected_h_2=snapshot.p4_port1_far_primary_line.h,
         )
-        p4_port1_next_orifice_resistance_chamber_inlet_derivative = (
+        (
-            self.components.p4_port1_next_orifice_resistance_chamber_inlet_line.derivatives_from_connections(
+            p4_port1_next_orifice_resistance_chamber_inlet_derivative,
-                port_1_m_flow=(
+            p4_port1_next_orifice_resistance_fixed_chamber_derivative,
-                    snapshot.p4_port1_next_orifice_resistance_chamber_inlet_node_to_line_flow
+            p4_port1_next_orifice_resistance_chamber_outlet_derivative,
-                ),
+        ) = self._fixed_chamber_segment_derivatives(
-                connected_h_1=snapshot.p4_port1_remote_orifice_line_port_1.h,
+            spec=self.components.p4_port1_next_orifice_resistance_chamber_spec,
-                port_2_m_flow=(
+            chamber=self.components.p4_port1_next_orifice_resistance_chamber,
-                    -snapshot.p4_port1_next_orifice_resistance_chamber_inlet_line_to_chamber_flow
+            chamber_properties=snapshot.p4_port1_next_orifice_resistance_chamber,
-                ),
+            inlet_line=(
-                connected_h_2=snapshot.p4_port1_next_orifice_resistance_chamber.h,
+                self.components.p4_port1_next_orifice_resistance_chamber_inlet_line
-            )
+            ),
-        )
+            inlet_line_properties=(
-        p4_port1_next_orifice_resistance_chamber_spec = (
+                snapshot.p4_port1_next_orifice_resistance_chamber_inlet_line
-            self.components.p4_port1_next_orifice_resistance_chamber_spec
+            ),
-        )
+            inlet_connected_properties=snapshot.p4_port1_remote_orifice_line_port_1,
-        p4_port1_next_orifice_resistance_chamber = (
+            inlet_node_to_line_flow=(
-            self.components.p4_port1_next_orifice_resistance_chamber
+                snapshot.p4_port1_next_orifice_resistance_chamber_inlet_node_to_line_flow
-        )
+            ),
-        p4_port1_next_orifice_resistance_fixed_chamber_derivative = (
+            inlet_line_to_chamber_flow=(
-            p4_port1_next_orifice_resistance_chamber.derivatives_from_two_connections(
+                snapshot.p4_port1_next_orifice_resistance_chamber_inlet_line_to_chamber_flow
-                port_a_m_flow=self._port(
+            ),
-                    p4_port1_next_orifice_resistance_chamber,
+            outlet_line=(
-                    "port_1",
+                self.components.p4_port1_next_orifice_resistance_chamber_outlet_line
-                ).m_flow,
+            ),
-                connected_h_a=(
+            outlet_line_properties=(
-                    snapshot.p4_port1_next_orifice_resistance_chamber_inlet_line.h
+                snapshot.p4_port1_next_orifice_resistance_chamber_outlet_line
-                    if p4_port1_next_orifice_resistance_chamber_spec.volume_inlet_port
+            ),
-                    == "port_1"
+            outlet_connected_properties=(
-                    else snapshot.p4_port1_next_orifice_resistance_chamber_outlet_line.h
+                snapshot.p4_port1_next_orifice_resistance_line_port_1
-                ),
+            ),
-                port_b_m_flow=self._port(
+            outlet_node_to_line_flow=(
-                    p4_port1_next_orifice_resistance_chamber,
+                snapshot.p4_port1_next_orifice_resistance_chamber_outlet_node_to_line_flow
-                    "port_2",
+            ),
-                ).m_flow,
+            outlet_line_to_chamber_flow=(
-                connected_h_b=(
+                snapshot.p4_port1_next_orifice_resistance_chamber_outlet_line_to_chamber_flow
-                    snapshot.p4_port1_next_orifice_resistance_chamber_inlet_line.h
+            ),
-                    if p4_port1_next_orifice_resistance_chamber_spec.volume_inlet_port
-                    == "port_2"
-                    else snapshot.p4_port1_next_orifice_resistance_chamber_outlet_line.h
-                ),
-                internal_h=snapshot.p4_port1_next_orifice_resistance_chamber.h,
-            )
-        )
-        p4_port1_next_orifice_resistance_chamber_outlet_derivative = (
-            self.components.p4_port1_next_orifice_resistance_chamber_outlet_line.derivatives_from_connections(
-                port_1_m_flow=(
-                    snapshot.p4_port1_next_orifice_resistance_chamber_outlet_node_to_line_flow
-                ),
-                connected_h_1=snapshot.p4_port1_next_orifice_resistance_line_port_1.h,
-                port_2_m_flow=(
-                    -snapshot.p4_port1_next_orifice_resistance_chamber_outlet_line_to_chamber_flow
-                ),
-                connected_h_2=snapshot.p4_port1_next_orifice_resistance_chamber.h,
-            )
         )
         return [
             *inlet_derivative.as_vector(),