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#1 |
Senior Member
AH
Join Date: Apr 2014
Posts: 287
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Assume a pipe with fluid inside eg -5 degrees centigrade. Passing through a slab.
Above slab a layer of water eg 10 millimeters, and above the water layer air at eg 15 degrees centigrade. Meshed every thing, selected; fluids, solids temps, .. k-epsilon, ... Can not see any ice? What have I missed, please? Fluent please, or CFX. |
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#2 |
New Member
Ali Jafarizade
Join Date: May 2009
Posts: 22
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hi
did you activate the solidification or melting model? did you define the melting or solidification tepreature and so on? regards ali |
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#3 |
Senior Member
AH
Join Date: Apr 2014
Posts: 287
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Dear Al
Thank you for your response. 1. Have activated Solidification and Melting. This is by simply selecting this model, in the Models menu. 2. Can not see where I can define the melting & solidification temperature. Please explain how I can do this? Thanks. |
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#4 |
New Member
Ali Jafarizade
Join Date: May 2009
Posts: 22
Rep Power: 17 ![]() |
Hi visitor
in the material panel you can find the solidification and melting temperature and also the latent heat which is required for the melting or solidification best regards Ali |
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#5 |
Senior Member
AH
Join Date: Apr 2014
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Thank you for your reply.
I have entered 0C for solidification and melting, and 330kJ/kg for latent heat. The ice layer is now formed, but almost constant at 0C. Where as the slab below the ice layer is at lower temperature, and the immediate air layer above ice is also lower. Would expect the ice layer to be lower than just 0C, nothing changed, even when the slab temp was lowered further. Thanks again for your clarifications. |
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#6 |
New Member
Ali Jafarizade
Join Date: May 2009
Posts: 22
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HI VISITOR
would you post some detailed picture so that i can understand what is the difficulty? thank you very much best regards Ali |
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#7 |
Senior Member
AH
Join Date: Apr 2014
Posts: 287
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Dear friend
Thank you for your response. Please see attached file. It is upside down, but can be corrected. Ice temp appears fixed at 273K, while temps below ice layer and above, in the air layer, the temps are lower. thanks |
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#8 |
Senior Member
AH
Join Date: Apr 2014
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Another Q?
I assume that setting up initial start body temperature condition is done through the cell zone>Operating conditions, and then choose a temperature, in this case the beginning concrete slab temperature. Fluent will then start calculations and find the new starting temperature. The Q; Is there another way of doing this? |
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#9 |
Senior Member
AH
Join Date: Apr 2014
Posts: 287
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Divergence has occurred because of temperature !
Will further lower URF to 0.6, & continue with k e- realizable - near wall treatment. Hope this will work. The solver actually run fine 80% through the transient simulation. But suddenly sharp diversion. This sudden divergence could be due to ice forming. Will share with what ever I will come with, thanks. |
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#10 | |
New Member
Sajedeh
Join Date: Aug 2017
Posts: 6
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Quote:
I have similar problem, energy and melting is one; however, there is no melting temp option or latent heat in material panel. How can I fix this problem?? |
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