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use of PCM's in a storage tank

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Old   June 11, 2018, 10:07
Default use of PCM's in a storage tank
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Abhishek Srivastava
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Dear members,

I am trying to simulate heat transfer and thermal stratification in a storage tank with the use of PCM placed on the top side of the tank in the form of spherical marbles inside a cylindrical container.

The problem i am facing is that the fluent automatically stops after 30 minutes of flow time. I cannot understand the problem because i already got the results without PCM and with insulation on outside. Also i don't understand why the simulation stops after running fine for 30 minutes of flow time. These 30 minutes of flow takes around 1 full day in my PC and it becomes frustrating to see it stops after a day of running. As soon as most of the water temperature in the tank reaches around 50 c the run automatically stops. I have to run the simulation till the water temperature reaches 60-65c.

Firstly i thought it was due to the fact that i am taking time step size as 5s, i reduced it to 0.01s then also it didn't solve the problem.

Model parameters:

PISO,PRESTO, Solidification/Melting model,


The error is:

cx1810.exe has stopped working
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energy storage, pcm, solidification/melting, thermal stratification

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