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-   -   solid region empty or not? (http://www.cfd-online.com/Forums/star-ccm/71353-solid-region-empty-not.html)

Trofrensis December 27, 2009 17:27

solid region empty or not?
 
Hi

I'm sorry for the question, these are the first times i approach the cfd simulation.

I have realized a model of heat shield for a exaust pipe.

I made two regions: a fluid and a solid .

My question is for the shield that belong two the solid region .

You can immagine it as a semi -shell that is close in eash side by boundaries belonging to solid region.

When i make my volume mesh and then i make a section it seems to be empty inside . It's normal? Becouse monitoring the section temperature during simulation , I can't understand if inside is empty or not.

I set parameters like thermal conductivity inside the continuum , but I've seen you can set it also in the interfaces. So i think that the first is for the material inside the solid continuum ,while the second is only for the contact interface with fluid (air) region ? Is that correct?

thank you

abdul099 January 7, 2010 09:35

hi

Quote:

Originally Posted by Trofrensis (Post 240998)
I set parameters like thermal conductivity inside the continuum , but I've seen you can set it also in the interfaces. So i think that the first is for the material inside the solid continuum ,while the second is only for the contact interface with fluid (air) region ? Is that correct?

I think, that's correct. You can specify a thermal conductivity inside the continuum, but also on the interfaces. It is used, if you want to add an additional thermal conductivity. For example, imagine a plane fuselage. To consider the effect of the external flow on the internal themal field, you can specify the additional thermal conductivity, so you don't have to simulate the external flow.

But i'm sorry, i couldn't understand your problem with the emty region. Maybe you could post an image?

regards


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