[atoof]

Dear Bernhard,

Is there any possible to use a thermally coupled boundary condition between two regions by swak (or groovybc)?

I have two solid and fluid regions where the following boundary condition should be satisfied.

-Ks * grad(Ts) = h * (Tf - Ts)

where Ks and h are known constants.

Best Regards,

Hossein

[gschaider]

Originally Posted by atoof

Dear Bernhard,

Is there any possible to use a thermally coupled boundary condition between two regions by swak (or groovybc)?

I have two solid and fluid regions where the following boundary condition should be satisfied.

-Ks * grad(Ts) = h * (Tf - Ts)

where Ks and h are known constants.

Best Regards,

Hossein

If you manage to set them up as mapped patches this might be possible with the mapped-function (see examples and the incomplete reference)

But why do you want to do this. I think the BC you describe is already in the built in functions (don't know the name)

[atoof]

Originally Posted by gschaider

If you manage to set them up as mapped patches this might be possible with the mapped-function (see examples and the incomplete reference)

But why do you want to do this. I think the BC you describe is already in the built in functions (don't know the name)

Dear Bernhard,

Thanks to reply. I am looking around these functions in the forum, but I have not got to a definitive answer. The nearest function as I've known so far is turbulentTemperatureCoupledBaffleMixed that used in multi region conjugate heat transfer solver.

I intended to apply the BC defined in the previous simply between solid and fluid regions in a laminar incompressible flow by swak. Do you suggest to manipulate above BC to achieve my own BC or define a new BC according to the simulation?

Could you please introduce me a mapped patches is suitable for that BC?

Thanks again,

Hossein

[Tobi]

Hey Hossein,

in my opinion it should be possible to adapt the turbulent... BC on the Interface between both regions. I always use this BC but I never had a laminar flow Situation.

I think you should test it out.

[atoof]

Originally Posted by Tobi

Hey Hossein,

in my opinion it should be possible to adapt the turbulent... BC on the Interface between both regions. I always use this BC but I never had a laminar flow Situation.

I think you should test it out.

Thanks Tobias,

Indeed, I created a solver that the properties of fluid interpolate from a lookup table according to the fluid temperature. To develop my solver to simulate fluid flow and solid temperature in a multi region (solid+fluid) domain, I need the above boundary condition in the interface. Therefore h value in boundary condition should be interpolated in each cell of fluid region.

Do you think, the turbulent... BC can be adapted for laminar flow according to above simulation?

Hossein

[atoof]

Originally Posted by gschaider

If you manage to set them up as mapped patches this might be possible with the mapped-function (see examples and the incomplete reference)

But why do you want to do this. I think the BC you describe is already in the built in functions (don't know the name)

Dear Bernhard,

Can 2-Way coupling of patches in groovy-bc be used to couple solid and fluid region such that used in http://openfoamwiki.net/index.php/Co...ing_of_patches?

Thanks

[gschaider]

Originally Posted by atoof

Dear Bernhard,

Can 2-Way coupling of patches in groovy-bc be used to couple solid and fluid region such that used in http://openfoamwiki.net/index.php/Co...ing_of_patches?

Thanks

That can be done (syntax is a bit different but described on the swak-page). But that way only ONE uniform value can be passed from one patch to the other (not one value for every face)

[ancolli]

Originally Posted by atoof

Dear Bernhard,

Can 2-Way coupling of patches in groovy-bc be used to couple solid and fluid region such that used in http://openfoamwiki.net/index.php/Co...ing_of_patches?

Thanks

Could u solve it with a value for every face from one patch to the other? Do u mind to share?

[gschaider]

Originally Posted by ancolli

Could u solve it with a value for every face from one patch to the other? Do u mind to share?

For a coupled patch there is a function neighbourField that gives you the value on the "other" side. So "neighbourField(T)" should give you the T-field on the other side. Just not sure whether this will work with mult-region cases. Alternatively try "mapped(T)"

Sorry. No time to experiment. But that is what I found in the reference guide in the Documentation folder

[ancolli]

Originally Posted by gschaider

For a coupled patch there is a function neighbourField that gives you the value on the "other" side. So "neighbourField(T)" should give you the T-field on the other side. Just not sure whether this will work with mult-region cases. Alternatively try "mapped(T)"

Sorry. No time to experiment. But that is what I found in the reference guide in the Documentation folder

thanks for ur time, I tried with both, but it seems that groovyBC can not reconise the field (I named them differently: Tsolid and Tfluid) in the second region without specifing it in the following way: {solid_to_fluid/solid}