Inner Mesh

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  • Last Post 29 November 2018
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RCamp posted this 11 October 2018

Hi all,

I am working on developing a mesh for a Fluent simulation. I have attached a picture below and as can be seen the surface mesh seems pretty uniform however, I am new to CFD and am curious if the inner mesh looks acceptable? It seems rather messy to my beginners eye. Additionally, I would really like to make the inner region of the column mesh finer compared to the outer region, is that possible?

Thank you.

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raul.raghav posted this 11 October 2018

 See the youtube tutorial attached below. It shows multiple ways of meshing a cylindrical geometry.

Inflation Meshing

ANSYS MESHING - Multizone + Inflation

Rahul

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RCamp posted this 11 October 2018

After looking at those resources I am trying to perform the inflation face-edge technique and keep getting a "mesh failing to initialize" error message. Any ideas of why this would be happening?

raul.raghav posted this 11 October 2018

Delete the “Patch Conforming Method” under “Mesh”.

Rahul

RCamp posted this 11 October 2018

 I tried this and am still having the same issue. The only time it will run is when I have the patch conforming on but then the inflation is not doing anything.

raul.raghav posted this 12 October 2018

Does your geometry consist of multiple cylinders?

Rahul

RCamp posted this 12 October 2018

I don't have a picture of the geometry handy but here is a streamline to help visualize. It's one cylinder but at the top it as a small nozzle region in the center that extends into the column for a few centimeters. It can vaguely be seen in the image below. 

Global Range Streamlines

 

rkumbhar posted this 12 October 2018

Hi Rcamp,

Insert sweep mesh method for the body and select inflation scoped face as a 'Source' face in the mesh method.

Thanks

Rahul

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raul.raghav posted this 12 October 2018

You can also use Multizone+Inflation to create a good quality mesh. Look at the attached video tutorial for reference.

Multizone + Inflation

If you can provide a cross-sectional view (XY or ZY planes) of your geometry, we would be able to guide you better.

Rahul

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RCamp posted this 12 October 2018

I tried the sweep method and it resulted in the same error. Here is a couple views of the geometry. Thank you.

 

 

 

 

 

RCamp posted this 12 October 2018

Again I am trying to make the core of this column's mesh finer. Is there a way to do that? All I can find is how inflation is used to make the mesh directly below the surface finer and this doesn't help me. 

 

Thanks.

 

-RCamp

rwoolhou posted this 15 October 2018

You can select surfaces in mesh and right-click to add a local sizing. I'd also look at the shape and decide if all of the features are needed as you need to resolve anything you include in the model to see their effect on the flow. 

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RCamp posted this 19 October 2018

Is it possible to local size changes within the mesh and not just on the surface?

rwoolhou posted this 19 October 2018

Yes, but you'd need to split a volume out to do this (or use a Body of Influence). Read up on volume decomposition. 

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HarishKolla posted this 29 November 2018

Hello 

can you suggest sources to get  proper knowledge on meshing  

peteroznewman posted this 29 November 2018

Harish, this discussion is marked as Solved.  Please post a New Discussion to ask questions. Did you try looking in the Tutorials listed in the site categories?

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