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melting of pcm in cylindrical annnulus?

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Old   December 31, 2008, 08:42
Default melting of pcm in cylindrical annnulus?
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Hi all;

i want to modelling melting of pcm in cylindrical annnulus. Phase change material(pcm) is located in concentric annulus and fluid is passed thorough at inner tube. i want to model melting of pcm. i draw the geometry in GAMBIT as 2D. in FLUENT, i select solidifacation/melting model. i defined material.

at the surface of the inner tube, i could not define third type (convection) boundary condition. (thermal resistance of the wall is negligible). Even i select first type boundary condition, pcm does not melt logically. how can i solve this problem?


sorry for my bed english.

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