Altair RISE

A program to recognize and reward our most engaged community members

Nominate Yourself Now!

Shared surfaces in hypermesh

Hello all,

warm greetings

I have a query regarding the shared surface that is needed to be created for the heat sources within control volume.

In my analysis, I have a heat source which is mounted on a frame at some distance from cold plate. The control volume has a fan for circulation of air. My query is :do I have to create shared surfaces of heat source with bracket also? As this bracket is further mounted on cold plate.

Find more posts tagged with

AcuSolve

English

Accepted answers

All comments

ydigit

Shared surface between two solids, need not be as separate surfaces. Since there will be no boundary conditions assigned to a surface between two solids, you may keep the shared surface as one. Beware that in background, AcuSolve will have two surfaces with different parent volumes. So if you want to check for heat flux, better separate these two surfaces, else you would get almost zero flux (due to positive from one side and negative flux from other).

Altair Forum User

Hello ,

warm greetings.

actually I need to check heat flux between two solids. In acusolve I checked the separate internal surfaces button, so I got two surfaces , but instead of shifting each to respective volumes I kept them as it is and in BC gave all these surfaces as wall with flux condition.

have I done something wrong?

ydigit

If there are two surfaces at the interface, say fluid_int and solid_int. If these are separated the heat flux will be positive on one of them and negative (same value) on the other, simple due to direction.

Instead if there is just one surface 'interface' visible in the Model tree, there will be negative and positive flux on this, effectively coming to almost zero (if you view in AcuProbe). The fluxes would be 'cancelling' each other.

Hence the suggestion to separate surfaces. In case this is not clear, I could create a small example to show the same. Let me know.

Altair Forum User

Hi Ydigit

Even i am working with similar problem fluid_int and solid int..Could u please explain with a small example as you Mentioned Above

Altair Forum User

Hello ydigit,

I have tried using separate internal surfaces.

When I tried creating mesh ... Acutail is displaying total no of elements formed But as soon as process is over it's giving a msg ' error in generating mesh'. Please refer the pic for the elements formation. But still I am not getting the 3D mesht<?xml version="1.0" encoding="UTF-8"?>

ydigit

2 hours ago, XTutulika said:

Hello ydigit,

I have tried using separate internal surfaces.

When I tried creating mesh ... Acutail is displaying total no of elements formed But as soon as process is over it's giving a msg ' error in generating mesh'. Please refer the pic for the elements formation. But still I am not getting the 3D mesht

Please check if there is file with .arm extension. You could try loading this file in AcuConsole as mesh. Mesh generation seems to be ok, maybe you are falling short of RAM.

Altair Forum User

Hello ydigit

warm greetings,

No file with extension .arm is formed. I have got files with extension .ams, .cnf, .sdm

my system configuration is 64gb RAM

Please suggest some other solution if possible.

regards.