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Heat Transfer

Posted 10.01.2012, 01:33 GMT-5 Fluid & Heat, Heat Transfer & Phase Change, Microfluidics, Chemical Reaction Engineering, Mesh, Studies & Solvers Version 4.1, Version 4.2 6 Replies

Bitia Chavez
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Hi!!! I would like to know more about heat transfer... How to make a new model, when i could use some ecuations and what are the principal prperties in comsl.
Thanks
6 Replies Last Post 24.02.2012, 15:10 GMT-5
ArseneNoume
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Posted: 1 decade ago 10.01.2012, 04:58 GMT-5
To give you an aswer, more details are needed.
Wich kind of system would you want to model? heat transfer in solid? in fluid?
What are the characterising parameters, boundary conditions?
To give you an aswer, more details are needed. Wich kind of system would you want to model? heat transfer in solid? in fluid? What are the characterising parameters, boundary conditions?
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 10.01.2012, 05:20 GMT-5
Hi

as for any "physics" in COMSOL, it's worth to: carefully read the related doc, check and perform several of the model library models (text in pdf, models ready), to look at a few of the numerous videos and demo, as well as follow a few of the related webinars. All this you find on the main web site of COMSOL

--
Good luck
Ivar
Hi as for any "physics" in COMSOL, it's worth to: carefully read the related doc, check and perform several of the model library models (text in pdf, models ready), to look at a few of the numerous videos and demo, as well as follow a few of the related webinars. All this you find on the main web site of COMSOL -- Good luck Ivar
Bitia Chavez
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Posted: 1 decade ago 20.02.2012, 12:17 GMT-5
Thank you very much for the reply,
I am simulating a furn built with different materials: brick, clay, etc.. In the oven you can see three phenomena of heat transfer: conduction convection and radiation.
I apply heat transfer in solid-with a heat flux within the furnace and outside of it.
But I'm not sure how to apply convection within the furn, should do as a new physical or in the physics of heat transfer in solids?
All the work I have been developing in the transient state.

Thank you for your help!
Thank you very much for the reply, I am simulating a furn built with different materials: brick, clay, etc.. In the oven you can see three phenomena of heat transfer: conduction convection and radiation. I apply heat transfer in solid-with a heat flux within the furnace and outside of it. But I'm not sure how to apply convection within the furn, should do as a new physical or in the physics of heat transfer in solids? All the work I have been developing in the transient state. Thank you for your help!
Nagi Elabbasi Facebook Reality Labs
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Posted: 1 decade ago 20.02.2012, 14:59 GMT-5
If you want to accurately capture the convection you should model the heat transfer problem coupled with fluid flow of the air in the furnace. You will find many examples on this conjugate heat transfer in the COMSOL model gallery that you can use as good starting points. Check, for example, the following model: “Convection Cooling of Circuit Boards: Forced and Natural Convection”.

Nagi Elabbasi
Veryst Engineering
If you want to accurately capture the convection you should model the heat transfer problem coupled with fluid flow of the air in the furnace. You will find many examples on this conjugate heat transfer in the COMSOL model gallery that you can use as good starting points. Check, for example, the following model: “Convection Cooling of Circuit Boards: Forced and Natural Convection”. Nagi Elabbasi Veryst Engineering
Bitia Chavez
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Posted: 1 decade ago 24.02.2012, 12:06 GMT-5
To do convection, I tried draw a geometry, adding air as material, defined pressure, velocity, heat transfer fluids and get error.
What can i do?
To do convection, I tried draw a geometry, adding air as material, defined pressure, velocity, heat transfer fluids and get error. What can i do?
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 24.02.2012, 15:10 GMT-5
Hi

as there are really many things that one can get wrong, specially in the beginning, I would really say play several of the models from the model libraary (print out the pdf and rebuild the model as written, do not load the finished models (nt to begin with), after having run carefully 2-3 and debugged them, I'm sure you will succeed here to

--
Good luck
Ivar
Hi as there are really many things that one can get wrong, specially in the beginning, I would really say play several of the models from the model libraary (print out the pdf and rebuild the model as written, do not load the finished models (nt to begin with), after having run carefully 2-3 and debugged them, I'm sure you will succeed here to -- Good luck Ivar

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