CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > CFX

convergence problem with high viscosity

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

LinkBack Thread Tools Search this Thread Display Modes
Old   February 29, 2008, 04:01
Default convergence problem with high viscosity
Posts: n/a
Dear all, I am working on simulation of gear motor. It's 2D steady state simulation. I had quite good results but now, when I increase the dynamic viscosity from 0.02 to 0.8 kg/m*s there are poor convergence problem. Next info about the model: material-oil, turbulence model-komega, advection scheme-upwind, time step-1e-4, intlet-static pressure, outlet-static pressure, taken the velocity of gears... I heard that higher value of the viscosity is better for convergence. Thanks a lot for answers and sorry for my english.

  Reply With Quote


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
Continuity eq convergence problem carno FLUENT 4 February 8, 2008 04:04
High turbulent viscosity, problem with BC Narmin FLUENT 2 May 8, 2007 03:17
convergence problem limseokmin FLUENT 3 November 14, 2004 12:43
Convergence Problem Johnny B FLUENT 5 November 4, 2003 16:01
convergence problem Trushar Phoenics 5 August 27, 2002 23:40

All times are GMT -4. The time now is 09:16.