heat transfer in an oven 2

[Amine A]

Hello,
I put a piece in an oven.
can I impose boundary conditions of the room and see the evolution of temperature on the surface of the piece ?
can I do that in COMSOL ?

 

[IRstuff]

https://www.comsol.com/heat-transfer-module#what

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[FEA way]

Yes, in COMSOL you can perform regular heat transfer simulation (Heat Transfer in Solids) and apply convection/radiation as boundary conditions. But you can also do Conjugate Heat Transfer simulation (multiphysics: Heat Transfer in Solids + Laminar/Turbulent Flow) to include air flow effects.

 

[Amine A]

FEA way do you know how to put that temperature profile (ramp up holding ramp down) in comsol

 

[FEA way]

When specifying temperature as boundary condition directly or defining external temperature for convection/radiation, you can enter a function instead of fixed value. It can be a name of a function created before in Definitions --> Functions (several types available) or expression written using Matlab syntax. Just be careful with units and with names of variables used by COMSOL. For example if you create a step function named step1, you should enter step1(t[1/s]) in the expression field where temperature is specified. COMSOL will warn you about unexpected units, unknown variables and incorrect syntax, if they occur in your expression.

 

[Amine A]

Thank you so much . I began with a ramp function to get used to it better but I didn't know about the units it doesn't work , for example if I want to bake the piece with this ramp function until 120degC what should I put there in the expression

 

[FEA way]

There's no need to define a variable. Just create a ramp function amd then enter rm1(t[1/s]) as temperature in boundary condition settings.

 

[Amine A]

thanks. FEA way I need your help brother !
I need tut this model in comsol , but I didn't know what physics exactly should I use to resovle the problem I told you before. what is the different if I use "turbulent flow" or "heat transfer in fluid" and what are the boundary conditions that I should put to enter that temperature profile.

 

[IRstuff]

Seems to me you'd be better served posting your question in the COMSOL user's forum

https://www.comsol.com/forumor

or talk directly to a COMSOL applications engineer

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