I am working on a CFD simulation using a Revit (STEP) file. The model includes both architecture and HVAC components in a single file. My objective is to analyze airflow and temperature on an open terrace where HVAC units are placed.
For this purpose, I selected a Conjugate Heat Transfer (CHT) analysis. I assigned:
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Air as the fluid region
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Steel and concrete as solid materials
After setting up the model, I applied boundary conditions such as velocity inlets and pressure outlets.
However, when I try to run the simulation, I encounter multiple errors related to boundary conditions and region assignments. It seems that some boundary conditions are incorrectly applied to solid regions instead of fluid regions.
Additionally, every time I upload a new STEP file or refresh the page, I repeatedly receive the same warnings for all simulations, and I have to manually review them each time. This is making the setup process very time-consuming.
I suspect there may be an issue with how the geometry (fluid vs. solid regions) is defined or extracted.
Could you please guide me on:
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Correctly defining fluid and solid regions for a CHT simulation
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Properly assigning boundary conditions only to fluid domains
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Avoiding repeated warnings after re-uploading or refreshing
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Whether I need to re-create or extract the flow volume separately
I can share the project link if needed.