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

SimpleFoam diverge problem

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 20, 2022, 17:03
Smile SimpleFoam diverge problem
  #1
New Member
 
zian cheng
Join Date: Mar 2022
Posts: 1
Rep Power: 0
WARMACHINEX is on a distinguished road
Hi,

I am trying to simulate the wind around a cube using the k-omega SST model to get the C_p value around the cube. When I run the solver, divergency happens after hundreds of timesteps, and I got high timestep errors, this is the error I got:

Time = 512

smoothSolver: Solving for Ux, Initial residual = 0.076812, Final residual = 6.03472e-07, No Iterations 3
smoothSolver: Solving for Uy, Initial residual = 0.077275, Final residual = 9.05036e-07, No Iterations 3
smoothSolver: Solving for Uz, Initial residual = 0.0608148, Final residual = 6.76609e-07, No Iterations 4
GAMG: Solving for p, Initial residual = 4.63556e-06, Final residual = 7.43667e-07, No Iterations 2
GAMG: Solving for p, Initial residual = 6.24736e-07, Final residual = 6.24736e-07, No Iterations 0
time step continuity errors : sum local = 31338.4, global = 1258.35, cumulative = 14145.1
smoothSolver: Solving for omega, Initial residual = 0.0005501, Final residual = 1.36789e-07, No Iterations 2
smoothSolver: Solving for k, Initial residual = 0.104849, Final residual = 8.41271e-07, No Iterations 3
bounding k, min: -6664.56 max: 3.28718e+25 average: 1.24281e+19
ExecutionTime = 1555.62 s ClockTime = 1559 s


I think most likely the problem is in boundary conditions but I still attached my mesh check file, any idea where should I look into it? The bounding K seems to be a problem, should I just look at the boundary condition for k or U and omega as well? A lot of thanks.

Regards,
Zian
Attached Files
File Type: txt log.04.checkMesh.txt (5.7 KB, 1 views)
WARMACHINEX is offline   Reply With Quote

Reply

Tags
openfoam, simple algorithm, timestep error

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
Problem with simpleFoam, laminar pipeCyclic fantaste OpenFOAM Running, Solving & CFD 0 January 14, 2015 03:37
Problem in running simpleFoam tutorial Lana OpenFOAM Running, Solving & CFD 1 April 10, 2013 11:08
SimpleFoam For cavity Problem himanshu28 OpenFOAM 1 January 16, 2013 01:49
simpleFoam: Problem with k-omega Model near Wall okroud OpenFOAM Running, Solving & CFD 0 June 13, 2012 10:13
SimpleFoam convergen problem maolongliu OpenFOAM 7 August 13, 2010 10:17


All times are GMT -4. The time now is 17:42.