|
[Sponsors] |
May 13, 2014, 08:22 |
Water to ice
|
#1 |
Senior Member
AH
Join Date: Apr 2014
Posts: 282
Rep Power: 13 |
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. |
|
May 13, 2014, 11:52 |
|
#2 |
New Member
Ali Jafarizade
Join Date: May 2009
Posts: 22
Rep Power: 16 |
hi
did you activate the solidification or melting model? did you define the melting or solidification tepreature and so on? regards ali |
|
May 15, 2014, 04:41 |
|
#3 |
Senior Member
AH
Join Date: Apr 2014
Posts: 282
Rep Power: 13 |
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. |
|
May 15, 2014, 05:12 |
|
#4 |
New Member
Ali Jafarizade
Join Date: May 2009
Posts: 22
Rep Power: 16 |
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 |
|
May 17, 2014, 00:01 |
|
#5 |
Senior Member
AH
Join Date: Apr 2014
Posts: 282
Rep Power: 13 |
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. |
|
May 17, 2014, 08:00 |
|
#6 |
New Member
Ali Jafarizade
Join Date: May 2009
Posts: 22
Rep Power: 16 |
HI VISITOR
would you post some detailed picture so that i can understand what is the difficulty? thank you very much best regards Ali |
|
May 18, 2014, 08:07 |
|
#7 |
Senior Member
AH
Join Date: Apr 2014
Posts: 282
Rep Power: 13 |
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 |
|
May 29, 2014, 01:21 |
setting intial starting body temperature
|
#8 |
Senior Member
AH
Join Date: Apr 2014
Posts: 282
Rep Power: 13 |
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? |
|
June 4, 2014, 09:27 |
Got back to work, but now divergence !
|
#9 |
Senior Member
AH
Join Date: Apr 2014
Posts: 282
Rep Power: 13 |
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. |
|
November 18, 2017, 02:13 |
|
#10 | |
New Member
Sajedeh
Join Date: Aug 2017
Posts: 6
Rep Power: 8 |
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?? |
||
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Mass imbalance problem in multiphase water and steam CFX case | Antech | CFX | 1 | October 26, 2020 04:03 |
pure melting of ice due to water at higher temp | ABH | Fluent Multiphase | 0 | April 2, 2014 06:00 |
Water subcooled boiling | Attesz | CFX | 7 | January 5, 2013 03:32 |
Terrible Mistake In Fluid Dynamics History | Abhi | Main CFD Forum | 12 | July 8, 2002 09:11 |
uptodate water distribution network | fredius,magige,tanzanian,(e.a) | Main CFD Forum | 0 | January 27, 2002 07:10 |