CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM

InterPhaseChangeFoam NACA0015 Pressure diverges

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   August 11, 2019, 04:17
Default InterPhaseChangeFoam NACA0015 Pressure diverges
  #1
Senior Member
 
chandra shekhar pant
Join Date: Oct 2010
Posts: 125
Rep Power: 11
chandra shekhar pant is on a distinguished road
Hello All,
I am trying to simulate the NACA0015 (RANS) using InterPhaseChangeFoam to understand the cavitation for cavitation number (\sigma)=1.09, the p_rgh=100000, U=13.38 , P_sat=2300 (all in SI unit). It seems that the flow (pressure) from the outlet is coming inside the computational domain and creating pressure oscillation into the domain thus, many times just crashing the code. Since I had to put the pressure of the outlet fixed at 100000 to calculate the cavitation number, thus could not modify the outlet BC for the P_rgh.


In the bounday_conditions.c I had included all the BCs. Similar problem arises if I am trying to simulate the LES also. I guess some thing is not correct with the P_rgh outlet condition. I am calculating the cavitation number (\sigma)= (p_rgh (outlet)-P_sat)/(0.5*(\rho=1000)*(U=13.38)^2)=1.09. Any help is this regard is highly welcomed since I am facing the same issue while simulating the sphere etc.


Many thanks!
Attached Images
File Type: png mesh_naca0015.png (48.4 KB, 10 views)
Attached Files
File Type: c fvSchemes.c (1.7 KB, 3 views)
File Type: c checkMesh.c (3.2 KB, 3 views)
File Type: c fvSolution.c (2.6 KB, 1 views)
File Type: c boundary_conditions.c (10.7 KB, 4 views)
chandra shekhar pant is offline   Reply With Quote

Old   August 15, 2019, 02:30
Default
  #2
Senior Member
 
chandra shekhar pant
Join Date: Oct 2010
Posts: 125
Rep Power: 11
chandra shekhar pant is on a distinguished road
Different files are attached with the post. If some needs I can put the video/screenshot of the fields. Hoping to get some response.


Thanks and regards
chandra shekhar pant is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wind tunnel Boundary Conditions in Fluent metmet FLUENT 6 October 30, 2019 13:23
Getting divergence while increasing the back pressure at pressure outlet greenfields15 FLUENT 0 March 19, 2018 00:39
Outlet pressure aja1345 FLUENT 5 August 18, 2015 12:02
High negative pressure with interPhaseChangeFoam legione OpenFOAM Running, Solving & CFD 7 July 5, 2015 11:28
Calculation of the Governing Equations Mihail CFX 7 September 7, 2014 07:27


All times are GMT -4. The time now is 23:29.