Choppy Mesh showing up in Results

Project Support
1

Hi all,

I’m working on a sidepod analysis for our FSAE team. I uploaded the CAD and meshed it just fine. The mesh looks really good around the radiators, but for some reason when the analysis runs, the mesh looks choppy around the radiators, and no pressure drop is occurring (even after using porous media). I’m curious if I might have something wrong, or maybe my actual geometry might be setup wrong.

Here’s my mesh around the radiators:

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image594×619 36.8 KB

And the choppiness when looking at results:

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image703×556 61.2 KB

I’m curious if anyone can give my project a deeper look and if I might be able to get some help!

Here’s my project:

https://www.simscale.com/workbench/?pid=2644082837488338142&mi=spec%3A7d8f25ed-ddaf-479c-a113-0a3085f0fde3%2Cservice%3ASIMULATION%2Cstrategy%3A3

Thanks so much,
Dawson

2

Hi!

I checked your model and noticed that the radiator is a void in the mesh:

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image980×713 291 KB

The porous media region must intersect with the mesh so that there is flow across it. This is why you don’t see a pressure drop.

In order to fix this, please assign the radiator part to the ‘excluded parts’ while creating the flow region.

1 Like
3

Hi @ggiraldof !

Thanks for the reply. So I went ahead and added the radiators to the ‘excluded parts’ while making my flow region. However, I’m only left with a flow region, and now just an empty zone where my radiators once were.

Do I need to take advantage of the CAD client to remake the geometry? How do I go about having the radiators in there and continuing this analysis?

Thanks!

4

Hi LakerRacing,
I assume you have this tutorial as it deals with the CAD setup and the issues associated with the radiator, but it is a pretty involved and a lengthy tutorial, so all the best. I do not have the expertise of @ggiraldof, so I leave to the experienced Simscale engineer. Tutorial: Incompressible Flow around a Formula Student Car

Kind regards
Ted

5

Hi,

In order to use the porous media to model the radiators, then the flow region must fill them.

Now you can assign the radiator parts to the porous media advanced concept, so that they are included in the computation.