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

Help with Boundary conditions for a two phase simulation.

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   May 10, 2019, 07:31
Default Help with Boundary conditions for a two phase simulation.
  #1
New Member
 
Florian
Join Date: Dec 2018
Posts: 20
Rep Power: 8
Archoncomando is on a distinguished road
Hello there,



i'm running a 2phase simulation (Water and Air) on a Hydrofoil wing. It took me a while but i finally managed to get it to converge on a value that makes sense and is pretty close to reality.



Now i wanna check how the wing performs when angled 1° up and down. All i changed was the arrangement of parts in the mesh. Mesh settings with influencebodies remain the same yet now the cases keep diverging again.



For the 0° simulation the fix seemed to be making the Boundaryconditions at the outlet more restrictive. I went from ZeroGradient for U, p_rgh and water to having u and water be fixedValues and p_rgh as fixedFluxPressure.


I kept those conditions the same for the -1° and +1° simulations yet they keep diverging. Does anyone have an idea what else i could try? CheckMesh only returns 3 high orthogonality faces out of 23million cells and says "Mesh OK" in general.



I'd be very grateful for some help.
Archoncomando is offline   Reply With Quote

Reply

Tags
boundary conditions, convergence, divergence, ltsinterfoam


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
Difficulty In Setting Boundary Conditions Moinul Haque CFX 4 November 25, 2014 18:30
Overflow Error in Multiphase Modelling with Two Continuous Fluids ashtonJ CFX 6 August 11, 2014 15:32
Radiation interface hinca CFX 15 January 26, 2014 18:11
Question about heat transfer coefficient setting for CFX Anna Tian CFX 1 June 16, 2013 07:28
Error finding variable "THERMX" sunilpatil CFX 8 April 26, 2013 08:00


All times are GMT -4. The time now is 03:55.