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Modeling Conveccion Natural!!

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Old   October 24, 2012, 14:40
Default Modeling Conveccion Natural!!
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jobito_2012
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hi guys

anyone have any tutorial of how to model natural convection with OpenFOAM?? ... or some case solved?

by please, I can send to aguilera1623@gmail.com

thank you in advance
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Old   October 24, 2012, 20:52
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Hello. An aspect of my doctoral research comprise wall bounded natural convection turbulent flow; you might have to clarify what it is you actually need answered.

Cheers,
Deji
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Old   October 24, 2012, 20:57
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Quote:
Originally Posted by deji View Post
Hello. An aspect of my doctoral research comprise wall bounded natural convection turbulent flow; you might have to clarify what it is you actually need answered.

Cheers,
Deji
Ok, I need to model the natural convection laminar and turbulent flows, but only Newtonian flows, could be air, water or oil.

This work I have to do in OpenFOAM and then Ansys-Fluent.

Hopefully I can help it.

thank you in advance!!
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Old   October 25, 2012, 09:25
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So what type of geometry are you planning to utilize? You ought to be more specific and detailed in order for anyone on here to assist and/or give you feedback.

My flows, natural- and mixed convection boundary layer flows are over a vertically oriented flat plate.

Cheers,
Deji
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Old   October 25, 2012, 14:11
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Quote:
Originally Posted by deji View Post
So what type of geometry are you planning to utilize? You ought to be more specific and detailed in order for anyone on here to assist and/or give you feedback.

My flows, natural- and mixed convection boundary layer flows are over a vertically oriented flat plate.

Cheers,
Deji

mmm Ok, well, there accompanying the underwriting year I have to do ... the fluid has properties from image, and is laminar... that's okay?

I have to do this exercise in OpenFOAM ... thank a lot!!
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Old   October 25, 2012, 17:58
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Hi,

I could not help myself but having a look at the scenario. It sounds interesting. Water heated to 2000K under micro-gravity? Any application or just an exercise to do?

There are a few tutorials that would be relevant. My personal choice would be the igloo case (I think it is called iglooWithFreezers from memory) with the buoyantBoussinesqSimpleFoam solver. The geometry is widely different (I would refer to one of the user guide tutorial for this aspect), but the general setup and boundary conditions should be close enough.

Edit: I think that the igloo case is turbulent so you would have to switch the turbulence model off. But it should not be too hard (change the correct parameter is constant/RASTurbulence).

Good luck.
Julien
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Last edited by julien.decharentenay; October 25, 2012 at 18:00. Reason: Laminar vs turbulence comment.
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Old   October 25, 2012, 22:13
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[QUOTE=julien.decharentenay;388580]Hi,

I could not help myself but having a look at the scenario. It sounds interesting. Water heated to 2000K under micro-gravity? Any application or just an exercise to do?

There are a few tutorials that would be relevant. My personal choice would be the igloo case (I think it is called iglooWithFreezers from memory) with the buoyantBoussinesqSimpleFoam solver. The geometry is widely different (I would refer to one of the user guide tutorial for this aspect), but the general setup and boundary conditions should be close enough.

Edit: I think that the igloo case is turbulent so you would have to switch the turbulence model off. But it should not be too hard (change the correct parameter is constant/RASTurbulence).
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Old   October 25, 2012, 22:16
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Quote:
Originally Posted by julien.decharentenay View Post
Hi,

I could not help myself but having a look at the scenario. It sounds interesting. Water heated to 2000K under micro-gravity? Any application or just an exercise to do?

There are a few tutorials that would be relevant. My personal choice would be the igloo case (I think it is called iglooWithFreezers from memory) with the buoyantBoussinesqSimpleFoam solver. The geometry is widely different (I would refer to one of the user guide tutorial for this aspect), but the general setup and boundary conditions should be close enough.

Edit: I think that the igloo case is turbulent so you would have to switch the turbulence model off. But it should not be too hard (change the correct parameter is constant/RASTurbulence).

Good luck.
Julien

Hi !!

The problem is only an exercise, a job for college ... but thank you very much for your comment, I will definitely help ...


Note: If you have a user guide on the subject, I hope you can send me to my mail ... aguilera1623@gmail.com

Thanks a lot!!
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Old   October 26, 2012, 07:03
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You can find the user guide for openFoam online at http://www.openfoam.org/docs/user/

I would recommend that you run Tutorials 2.1 Lid Driven Cavity to understand the meshing aspect and get you started. Then have a look at the tutorials hotRoom and iglooWithFridges in buoyantBoussinesqSimpleFoam.

Good luck with it.
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Old   October 28, 2012, 12:59
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Quote:
Originally Posted by julien.decharentenay View Post
You can find the user guide for openFoam online at http://www.openfoam.org/docs/user/

I would recommend that you run Tutorials 2.1 Lid Driven Cavity to understand the meshing aspect and get you started. Then have a look at the tutorials hotRoom and iglooWithFridges in buoyantBoussinesqSimpleFoam.

Good luck with it.
thanks for your help!! I´ll
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Old   November 8, 2012, 17:29
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Hi, here there is a reference, solved with FOAM

http://www.cimec.org.ar/ojs/index.ph...File/3760/3682

Regards.
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Old   November 18, 2012, 18:27
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Quote:
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Hi, here there is a reference, solved with FOAM

http://www.cimec.org.ar/ojs/index.ph...File/3760/3682

Regards.
Thanks a lot for help me!!
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