CFD Error Message: Surface cannot be meshed

[Anonymous]

Hi, I am student who's new to CFD 2019. I am following a tutorial but I keep encountering error messages along the way. I have tried a few ways to try and fix it but I am also unsure of what exactly the problem might be. I tried autosizing, using the geometry tools, and refinement. I am not sure where to go from here and could use a step in the right direction please

This is the first error I got after only autosizing and running the solve simulation, and once again after size refining the volume:

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This is the error I got after autosizing again and setting the surface and gap refinement to true but I wasn't sure how to fix this one:

Best,
Nat 

[Anonymous]

I am attaching my Revit2020 file just in case since that's where I started from. It's where I got my SAT file and then imported that into CFD.

[marwan_azzam]

Hello Natalia,

I have one word of advice for you: simplify.

Your model has way too many details and a lot of them can cause meshing issues.

For starters, the long, seemingly extra, volums seen in image below can cause a problem.  They will probably go away after you simplify the model.

Another example is the toilet.  It has way too many details and hence volumes.  See the following 5 images.  If can probably be replaceed with a simple shape.

You have door handles, faucets and so on that may not need to be in the model.

cheers,

Marwan