|
[Sponsors] |
initialising a thermal boundary layer at interface using funkySetFields |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
October 8, 2019, 12:34 |
initialising a thermal boundary layer at interface using funkySetFields
|
#1 |
Member
Sam
Join Date: May 2019
Posts: 64
Rep Power: 7 |
Hi all,
I am using interThermalPhaseChangeFoam to model a growing vapour bubble in a superheated liquid that can achieve results as shown in the following image. Apologies for the enlarged image. I have initialised the bubble using funkysetfields by using the following code. initFieldAlpha { field alpha1; expression "1"; keepPatches true; } initTemp { field T; expression "378.15"; keepPatches true; } alpha1.org { field alpha1; expression "0"; condition "pow(pos().x-0,2) + pow(pos().y-0,2) < pow((0.1E-3),2)"; keepPatches true; } BubbleTemp { field T; expression "373.15"; condition "pow(pos().x-0,2) + pow(pos().y-0,2) < pow((0.1E-3),2)"; keepPatches true; } However, I am trying to initialise a thermal layer around the interface of the bubble by the equation as shown in the image using the equation. δT = r(T = Tsat + 0.99(T∞ −Tsat)) −R0 where δT is initial thermal layer thickness (7.00 × 10−6) R0 is initial bubble radius It is suggested that the initial thermal boundary layer is to be misplaced about 1-2 cells outside the bubble interface on the liquid side. I am unsure whether this can be achieved by funkysetfields or groovyBC or through codeStream. Thanks for spending the time looking at my problem. If i need to provide you with more information please let me know. |
|
October 25, 2019, 16:56 |
|
#2 |
Member
Sam
Join Date: May 2019
Posts: 64
Rep Power: 7 |
Hey guys,
Does anyone have any suggestions/guidance for this problem? Last edited by saj216; October 26, 2019 at 16:26. |
|
November 12, 2019, 17:04 |
|
#3 |
Member
Sam
Join Date: May 2019
Posts: 64
Rep Power: 7 |
Anyone have any ideas, getting a bit desperate here . My knowledge so far, suggests that I use groovyBC however I'm unsure how to define the thickness of the boundary.
|
|
January 10, 2023, 10:32 |
|
#4 |
New Member
Nikhil Chitnavis
Join Date: Sep 2019
Location: India
Posts: 19
Rep Power: 7 |
Hi Sam,
Can you please tell me how you have initialized the temperature field (thermal boundary layer) in this pool boiling case. If possible can you share your test case? Thank you |
|
January 10, 2023, 12:56 |
|
#5 |
Member
Sam
Join Date: May 2019
Posts: 64
Rep Power: 7 |
Hi Nikhil,
Apologises I haven't been able to complete this. My project changed and I ended up doing something else. A way to do it is to initialise a space between the bubble and the liquid using the > and < commands. So added another two set of commands for the alpha field and the temperature field for the area when the bubble is greater than the radius and when the interface is between the bubble and liquid. I hope it makes sense to you. |
|
January 11, 2023, 02:45 |
|
#6 | |
New Member
Nikhil Chitnavis
Join Date: Sep 2019
Location: India
Posts: 19
Rep Power: 7 |
Quote:
Hi Sam, Thank you for the suggestion, I will try to implement this. Also in one of your page you posted that you converted interThermalPhaseChangeFoam for the newer version. If possible can you share that updated solver. Thankyou |
||
February 10, 2023, 14:17 |
|
#7 |
Member
Sam
Join Date: May 2019
Posts: 64
Rep Power: 7 |
Apologies for the late reply.
I have found a link for interThermalPhaseChangeFoam for a updated version 6. https://github.com/Swagga5aur/interThermalPhaseFoam I hope this helps as mine differs greatly from the original solver. |
|
February 25, 2023, 11:05 |
|
#8 | |
New Member
Nikhil Chitnavis
Join Date: Sep 2019
Location: India
Posts: 19
Rep Power: 7 |
Quote:
Hi Sam, Thankyou for your reply and suggestion for the updated version of interThermalPhaseChangeFoam. |
||
Tags |
boundaries, bubble, code stream, funkysetfields, groovybc |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Fluid Domain moving with Rigid body | Lloyd Sullivan | CFX | 3 | August 17, 2018 09:58 |
How to use the CFX periodic interface | zhihuawan | CFX | 61 | January 15, 2018 16:20 |
Error - Solar absorber - Solar Thermal Radiation | MichaelK | CFX | 12 | September 1, 2016 05:15 |
Basic Nozzle-Expander Design | karmavatar | CFX | 20 | March 20, 2016 08:44 |
An error has occurred in cfx5solve: | volo87 | CFX | 5 | June 14, 2013 17:44 |