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melting of a pcm

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Old   March 13, 2013, 10:46
Default melting of a pcm
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manuel
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hello,
i try to simulate a melting process. it alredy works in 2d. but now i want to simulate the same problem in 3D. For my first try i want to do this without gravity.

My model: there is a sixth part of a pipe (inner wall = convection with free steam temperature above the pcm melting temp). the pipe is surounded with pcm (it looks like a pice of cake).

summarizing: one wall is heated. all other geometric walls are set by symmetry

when i start my calculation it beginns to melt a the interface between the pipe and pcm. it happens in axial oriented lines (see the picture: pcm_melting_begin.jpg). at the point where the whole surface is molten (pcm_melting_end.jpg), there is no further increase of the melting process. So the melting front is not moving outside as it would be expected.

i took all the setting from the 2d.

please can anybody help me out!! this is for my master thesis. and it is now really urgent!

thank you!!
Attached Images
File Type: jpg grid_steel_pcm.jpg (83.1 KB, 20 views)
File Type: jpg pcm_melting_begin.JPG (9.2 KB, 21 views)
File Type: jpg pcm_melting_end.JPG (11.9 KB, 24 views)
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Old   March 14, 2013, 03:13
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manuel
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is that possible that nobody knows how to solve my problem??

i am really grateful for any help!!
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Old   April 8, 2013, 13:33
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ashish
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Quote:
Originally Posted by flex00 View Post
hello,
i try to simulate a melting process. it alredy works in 2d. but now i want to simulate the same problem in 3D. For my first try i want to do this without gravity.

My model: there is a sixth part of a pipe (inner wall = convection with free steam temperature above the pcm melting temp). the pipe is surounded with pcm (it looks like a pice of cake).

summarizing: one wall is heated. all other geometric walls are set by symmetry

when i start my calculation it beginns to melt a the interface between the pipe and pcm. it happens in axial oriented lines (see the picture: pcm_melting_begin.jpg). at the point where the whole surface is molten (pcm_melting_end.jpg), there is no further increase of the melting process. So the melting front is not moving outside as it would be expected.

i took all the setting from the 2d.

please can anybody help me out!! this is for my master thesis. and it is now really urgent!

thank you!!

hi...
My project is basically a heat transfer study of two solids touching eachother. One of the solids has an applied heat flux to one face, and the other solid (PCM) is supposed to melt.
at the begining when i define the wax as solid i can not define properties like solidus,liquidus temperature etc.how i can defne wax as solid at the begining
kindly help me ....
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