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Wall layers on to specific areas

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jesus.santosgonzalez
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Wall layers on to specific areas

Hi forum,

 

I am working on modelling an IT room of a data center to analyze the thermal metrics, and I am having issues with the false floor plenum.

 

For now, I have tried different approaches to model the perforated tiles:

 

- Using a distributed resistance volume for the grille: Mesh requirements become too requiring to estimate the pressure drop accurately, so I have discarded this approach.

- Modelling surface resistances for the equivalent open area, surrounded by a solid volume: Surface resistances don't seem to work well when boundaring a solid volume.

 

So the approach I am working on now is on using a surface resistance for the equivalent area of the perforated tiles, and a solid surface material for the frame (it would work also by adding the corresponding solid boundary conditions)

 

The problem I am facing is that, due to the fact that the frame is now a FLUID VOLUME (although there is a solid surface on the limit of this volume), I don't get the wall layers meshing on the perforated tile, which makes the flow distribution poor.

 

Does anyone know how to add manual wall layers or have any suggestion to improve the other approaches I tried for the false floor?

 

Thanks in advance

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