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Autodesk CFD Mesh workflow

Anonymous

Autodesk CFD Mesh workflow

Anonymous
Not applicable

I have a geometry that has several solid materials volumes and 3 fluid material volumes assigned. 

I am trying to build the following mesh definition:

 

1. Automatic size for all geometry;

2. Select all the geometry less the 3 fluids volumes and play with the size adjustment slider;

3. Select one specific fluid volume and enable wall layer and surface refinement. 

 

The problems that I am facing start after the point 2. Despite I had selected all the geometry less the 3 fluid volumes to play with the size adjusment, when I select them I notice that only 1 of the 3 volumes keep the adjustment slider at value "1". The others 2 volumes have their size changed.

 

Then, the other problem is that I can't apply wall layer and surface refinement only to a specfic volume despite I have only it selected. Only this specific fluid volume will work under turbulence conditions and will have a big impact on heat transfer, that is why I only want to apply these settings to it. To keep my mesh as simple as possible.

 

I may say that I click apply changes between any of those steps I refered. Any help is aprreciated!

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Accepted solutions (1)
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marwan_azzam
Alumni
Alumni

Hello,

 

Even though you can access the Wall Layer setting when you edit the mesh for any given volume, this setting will apply to all volumes in the model.

In other words, the wall layer setting will apply to the entire model and you cannot turn it on or off for individual volumes.  It's either on of the entire model or off for the entire model.

 

Marwan

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Anonymous
Not applicable
The same way for the surface refinement?
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marwan_azzam
Alumni
Alumni

Yes, the same thing for surface refinement.

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Anonymous
Not applicable
Ok, thank you. But about my first problem that is annoying to...After applying automatic size, I selected all the geometry less my fluid geometry and changed the size adjustment slider to value 3 and apply settings. Then I click in my fluid geometry one by one, just to check, and 2 of them are with the size adjustment at value 3, where they should be with the value 1 (default).
What am I missing here?
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marwan_azzam
Alumni
Alumni

I am not sure what is going on there.  Only thing I recommend is to make sure you are not selecting extra bodies by accident when you set the slider to 3.

 

Marwan

Anonymous
Not applicable

I recorded a video if you can take a look: https://we.tl/t-TjLjmotebC

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marwan_azzam
Alumni
Alumni

I'm not able to view the video

 

Player.png

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Anonymous
Not applicable

Did you download the video? Because I posted a link online but the quality was very bad, then replaced it by a wetransfer link. In my computer it plays fine. A new link, I changed the filetype to mp4: https://we.tl/t-HZBvcXsNoX

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marwan_azzam
Alumni
Alumni

I see.

That is probably because those three volumes you deselected are fully embedded within the volumes you set to a size of 3.

 

Marwan

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Anonymous
Not applicable
Ah ok, now I understand... but is there anyway around to make what I want to do? They are not completelly embedded though... you can see the inlets and outlets coming out...
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marwan_azzam
Alumni
Alumni
Accepted solution

I'd say they are enclosed.

You can still select those three volumes and set whatever mesh size you want.  It does not seem too involved to do that.

 

Marwan

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