Running Conjugate Heat Transfer Studies—Creo Simulation Live
Conjugate heat transfer studies are used to study the combined effects of heat transfer through a solid as well as through the fluid.
To run a conjugate heat transfer study you must ensure the following inputs:
• At least one solid domain.
• Valid materials for all the solid bodies or parts in the model.
• At least one fluid domain—This is a closed volume through which the fluid flow is simulated. The fluid domain must be an internal or external volume of a part or assembly.
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Currently you cannot use enclosure volumes created in Creo for a conjugate heat transfer study but you can manually create a separate part (solid model) for external volume and designate it as the fluid domain.
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You can also define multiple fluid domains in multi-body models or assemblies. In studies with multiple fluid domains, you can assign different fluid materials to different fluid domains. In such cases, fluid domains must be separated by a solid wall.
• Fluid material—Some fluid materials are available in the Materials Library. You can also create a new fluid material from the Materials dialog box.
You can assign different fluid materials to different fluid domains.
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For a conjugate heat transfer study, fluid-fluid interfaces with different materials are ignored by the solver. You can either delete these contacts or make them free contacts instead of bonded contacts.
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• Boundary or thermal conditions—If only boundary conditions are specified then the following minimum boundary conditions must be specified:
◦ One inlet boundary condition (flow velocity, inlet pressure, mass flow, swirl inlet, rotating wall)
◦ One outlet boundary condition (outlet pressure)
Workflow: Running a Conjugate Heat Transfer Study
The following is the workflow for setting up and running a conjugate heat transfer study:
1. Open a model and click Live Simulation.
2. Click > 
Fluid Simulation Study.
Fluid Simulation Study.3. A fluid simulation study with a default name is created and listed in the Simulation Tree.
4. Define the fluid domain for the study. You can use an existing internal volume created in Creo Parametric or create a volume in Creo Simulation Live.
To create an internal volume in Creo Simulation Live, click > 
Internal Volume to open the Internal Volume tab and create an internal volume. See the related link “To Define an Internal Volume” at the end of this topic for the detailed procedure.
Internal Volume to open the Internal Volume tab and create an internal volume. See the related link “To Define an Internal Volume” at the end of this topic for the detailed procedure.5. Click 
Fluid Domain. The Fluid Domain Definition dialog box opens. If you already have an internal volume feature defined in the model, it appears in the References collector of the Fluid Domain Definition dialog box. If the model contains more than one internal volume feature then they are not selected automatically.
Fluid Domain. The Fluid Domain Definition dialog box opens. If you already have an internal volume feature defined in the model, it appears in the References collector of the Fluid Domain Definition dialog box. If the model contains more than one internal volume feature then they are not selected automatically.You can select alternative volumes from the Model Tree or from the graphics window. A body, part, component, or a closed quilt can be a fluid domain Your selection appears in the References collector. Select a volume and right-click Remove to remove a selected volume that you do not want to use in the study.
6. Right-click the fluid domain in the Simulation Tree and select Edit Materials. The Materials dialog box opens. Select a suitable fluid material from the Material Directory folder.
If none of the available fluid materials are suitable, click > > on the Materials dialog box and create a new fluid material.
Click OK to assign the material to the fluid domain.
7. Assign boundary or thermal conditions for the fluid domain. A surface can have both thermal and boundary conditions.
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To model fluid temperature fields, you can specify the fluid temperature at inlets and any of the other thermal boundary conditions for walls.
8. Click > and then select the Conjugate Heat Transfer check box to activate the CHT mode of the fluid study.
Contacts are created for the fluid-solid interfaces as well as for the fluid-fluid interfaces in models with multiple fluid materials. The contacts are available in the Model Tree under a Fluid-Solid (
) node.
) node.The distance considered for detecting contacts at the fluid-solid interface is automatically calculated based on the geometry. Change this value by changing the value of FSI tolerance in the Detect Contacts dialog box.
In the case of multibody models or solid assemblies, thermal solid-solid bonded contacts are created at the solid-solid interface in the model.
9. Click 
Simulate to start the simulation study. You can see the results in the Graphics Window updating almost instantaneously. Results of a fluid study change over time. The results legend displays the duration for which the simulation has run.
Simulate to start the simulation study. You can see the results in the Graphics Window updating almost instantaneously. Results of a fluid study change over time. The results legend displays the duration for which the simulation has run.