Boiling of water in 4.0-4.1

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Kalle Lofgren

Kalle Lofgren

January 27, 2011 1:42pm UTC

Boiling of water in 4.0-4.1

Hi!
I am trying to follow the pdf-tutorial on how to make comsol boil water (www.comsol.com/showroom/documentation/model/3972/).
My problem is that the tutorial is written for comsol 3.5, and as you know pretty much nothing is the same in the newer versions!
I think i have understood everything in the tutorial exept the chapter "Physics settings" (s 17-18) where you are suppose to modify the continuity and phase field equations to allow for phase change.

I am successful in solving the Transient Initialization step, but I cant get the Time dep. study to work.
I would be very glad if someone could help me find out how i am supposed to type in those settings!

I have tried to add a Volume Force to my lan 2-face flow and typed in: "usource-chns.divU" for x, and "-u*phix-v*phiy+source.phi" for y, but then when i run the Time dep. study it fails to evaluate variable jacobian...
If i skip the volume force it fails to find consistant initial values...

You can download the 3.5 version mph-file at the link i posted earlier.

Thanks
/Kalle

Attachments:   Boiling4.0a.mph  

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Lechoslaw Krolikowski

Lechoslaw Krolikowski

February 10, 2011 3:55pm UTC in response to Kalle Lofgren

Re: Boiling of water in 4.0-4.1

My proposal is as follows. Run COMSOL 4.1 (You need COMSOL Multiphysics 4.1 + CFD Module + Heat Transfer Module). Open the file boiling_water.mph from www.comsol.com/showroom/documentation/model/3972/. When opening this file will be processed in accordance with the requirements of the Comsol 4.1 program. On the Model Builder window expand model tree. By left-clicking on the nodes you see all of the settings.
Regards
Andrzej Kolek

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Søren Erbs

Søren Erbs

April 27, 2011 2:33pm UTC in response to Lechoslaw Krolikowski

Re: Boiling of water in 4.0-4.1

Hi... I'm also trying to model boiling water in comsol 4.1 with great difficulty. If you manage to pull it off I would very much appreciate any assistance!

Kind Regards

Søren

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