## Solid-liquid phase change

Elmer cases by the users for the users
Martin2000
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Joined: 02 Jan 2016, 22:45
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### Solid-liquid phase change

Hi Elmer users,

I wanted to simulate the phase change of water from liquid to solid with the enthalpy method. I am not sure, if I get the right input parameters because the time until phase change is happening is very short, so it would be nice if anybody who is practised in phase change simulations could take a look at the sif. First I had also Problems with the convergence tolerance. I solved this problem in decreasing the nonlinear relaxation factor to 0.25. My Problem is in 2D and the water is in a ractangular box with the size of 0.25*0.5 m.

I appreciate any hints.

Yours sincerely, Martin.
Attachments
case.sif

raback
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Joined: 22 Aug 2009, 11:57
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Location: Espoo, Finland
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### Re: Solid-liquid phase change

Hi

For various phase change strategies the test case of Julien may be very usefull. See,
viewtopic.php?f=3&t=3846&start=0&hilit=phase+change

-Peter

XisZero
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Joined: 11 Sep 2014, 12:10
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### Re: Solid-liquid phase change

Hi Martin,

As far as i can see in your SIF, the Enthalpy is way too small.
I dont know what values you are using, but try with multiplying by 1000 as the unit of enthalpy should be J/m^3 . (333 kJ / kg, density = 1000 kg/m^3 --> 333 MJ/m^3).
Your cp is in J/kg K i think?

In addition to Peters link, you could take a look at a phase change UDF i have written for some tests:
viewtopic.php?f=3&t=3639

Hope it helps.

Greetings,

X=0

Martin2000
Posts: 5
Joined: 02 Jan 2016, 22:45
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Hi XisZero,