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Simulating liquid metal in Fluent

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Old   October 14, 2014, 12:35
Default Simulating liquid metal in Fluent
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Hi,

I want to simulate the effect of liquid metal pool and solid metal (combined). The liquid metal is constantly being heated due to the presence of heat source. This will melt the surrounding metal which is currently in the solid state.

What I did was that
1. I made a rectangular geometry and made a small rectangle on its top side.
2. I then specified the small rectangle as fluid zone and the lower big rectangle as solid. In fluent, I then specified liquid metal properties.
3. I made interface between solid and liquid parts.
4. I specified the newly created walls (formed from the interfaces) the Marangoni stress (as saw in a tutorial of solidfication and melting in ANSYS FLUENT).
5. I also turned on the solidification adn melting option. Specified the fluid zone in Cell Zone condition with Source term and then add the energy source term as 10,000 W/m3. I specifed the top wall of small rectangle as wall but with Mar. stress and gave temperature of 1000K.
6. I ran unsteady simulation but the melting effect is not appearing.
7. The temperature is high in the liquid metal region but only 50% rest of the liquid metal region and solid are mostly at 300K. There should be temperature variation w.r.t time. It should be like T shape (the melted region)

Please help me out.
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Old   January 22, 2015, 08:27
Default Simulating liquid metal flow
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Please help me out in this problem
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Old   January 22, 2015, 08:34
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Hi, the macro error is that you defined two zones: fluid and solid.
You must defined only one fluid zone.
When you define the liquid properties you must set liquidus and solidus temperatures.
When initialize patch appropriate temperatures, then before starting calculation check from countour charts if all is initialized correctly.
Once you start the calculation if the heat source is strong enough you will see the solid phase melting.

Daniele
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Last edited by ghost82; January 22, 2015 at 10:01.
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Old   January 22, 2015, 08:54
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I know that solidus and liquidus temperatures are activated only if solidification and melting model is turned on in Fluent. How I can see solid zone melting if not defined initially. From your reply I can assume to model only one region and that is the fluid. Do I need to give properties of liquid metal there? Where to specify the Marangoni stresses?
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Old   January 22, 2015, 08:58
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By patching temperatures at time 0 in post processing you can see where solid and liquid are (contours of liquid fraction).
Read carefully this tutorial:
http://www.engr.uconn.edu/~barbertj/...2012/tut22.pdf
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Old   January 22, 2015, 10:35
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In my case I have no pull velocity, what to do?
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Old   January 22, 2015, 10:39
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Just uncheck "include pull velocities".
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Old   January 22, 2015, 11:09
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Thanks ghost82. Would you mind if I send you my case and data files so that you may have some additional comments/suggestions?
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Old   January 22, 2015, 11:46
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I have no problem to check your files; however, I suggest you to setup your simulation, check results, try to understand if something goes wrong and try to fix it, and post here your problems if you can't solve them.
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Old   January 22, 2015, 11:50
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I have solved the problem , thanks for your help, but I want to show you for my confidence. Please send me your email address.
Thanks
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Old   April 30, 2016, 08:01
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Can u give the snapshot for the boundary setting of ur successful melting process in fluent. @Shamoon Jamshed
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