meshing issue in hyperworks cfd

Unknown

I was trying to extrude the surface mesh in hyperworks cfd. Do you know how can I effectively extrude hex mesh for multiple volumes in hyperworks cfd?

step 1: 

Step 2:

step 3:

step 4: error during volume mesh

James Lewis

Hi Prabin,

 

Can you share the model?

 

Unknown

Here are the models. Is complete hex meshing possible in hyperworks cfd?

James Lewis

Prabin Pradhananga_20428 said:

Here are the models. Is complete hex meshing possible in hyperworks cfd?

Hi Prabin,

 

I saw that in the model you sent, you already can create hexe mesh inside.

So, why are you need this hex mesh for?

Actually, in hyperworks cfd using fem method, tetra mesh is enough for you for the modelling.

Unknown

James Lewis said:

Hi Prabin,

 

I saw that in the model you sent, you already can create hexe mesh inside.

So, why are you need this hex mesh for?

Actually, in hyperworks cfd using fem method, tetra mesh is enough for you for the modelling.

Thank you for your effort. Do you have an easier method to increase number of elements along the thickness for only the volume set in the middle?

ydigit

Prabin Pradhananga_20428 said:

Thank you for your effort. Do you have an easier method to increase number of elements along the thickness for only the volume set in the middle?

You could increase the number of elements in a particular direction of a solid using "volume layer" option in HyperWorks CFD

 

Unknown

ydigit_21275 said:

You could increase the number of elements in a particular direction of a solid using "volume layer" option in HyperWorks CFD

 

I didn't find volume layer option. Would you please write where this option is?

acupro

Prabin Pradhananga_20428 said:

I didn't find volume layer option. Would you please write where this option is?

If you apply a 'Volume Mesh' attribute to a particular solid, you can enable Thin Layer meshing and specify a number of layers.

In this case, I would probably stick with extrusion for that internal volume, as it's easily extrudable.

Unknown

acupro_21778 said:

If you apply a 'Volume Mesh' attribute to a particular solid, you can enable Thin Layer meshing and specify a number of layers.

In this case, I would probably stick with extrusion for that internal volume, as it's easily extrudable.

I found extrusion for three different volume sets a little tricky. Also, it is difficult to set different number of elements along the thickness for the volume set at the middle.

acupro

Prabin Pradhananga_20428 said:

I found extrusion for three different volume sets a little tricky. Also, it is difficult to set different number of elements along the thickness for the volume set at the middle.

You may want to try defining three different extrusions - source1 to target1, then source2 (which is the same as target1) to target2, then source 3 (which is the same as target2) to target3.

If we take a step back - what are you trying to do with the simulation?  (What is the physical process you want to simulate?)

You also might be better off trimming the 'points' of the geometry so you don't have the tiny angles, as this often presents difficulties for meshing, and there generally won't be much flow in that region anyway.

Unknown

acupro_21778 said:

You may want to try defining three different extrusions - source1 to target1, then source2 (which is the same as target1) to target2, then source 3 (which is the same as target2) to target3.

If we take a step back - what are you trying to do with the simulation?  (What is the physical process you want to simulate?)

You also might be better off trimming the 'points' of the geometry so you don't have the tiny angles, as this often presents difficulties for meshing, and there generally won't be much flow in that region anyway.

The extrusion for three volume sets does not work as expected I have added an image for the result. 

I am trying to simulate a simple flow problem with momentum source within the domain. I am trying not to use tetra but use quad or prism elements. I will try to simplify the geometry.