CFD Online Logo CFD Online URL
Home > Forums > CFX

free surface simulation with parallel caculation?

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

LinkBack Thread Tools Display Modes
Old   July 27, 2013, 04:48
Default free surface simulation with parallel caculation?
New Member
Join Date: May 2013
Posts: 22
Rep Power: 6
rabbitmelon is on a distinguished road
1) I am running some free surface simulations. When i run a such simulation with more than one core, there is usualy a error "ERROR #004100018 has occurred in subroutine FINMES, Message: Fatal overflow in linear solver" at sometime during the simulation. I have read from somewhere, that it would be problematical, if any portion of a partition boundary is aligned with the free surface. Is there a solution, so that the parallel caculation can be used?

2) According to the solver modelling guide, it may be useful for free surface simulation to set the timestep for the volume fraction equation an order of magnitude smaller than for the momentum equation. But how can i do this? I have tried the equation class settings in the solver control, but there is no further settings for volume fraction (see bild1 in attach). Where else can the timestep for the volume fraction equation be adjusted?
rabbitmelon is offline   Reply With Quote

Old   July 27, 2013, 07:13
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 14,202
Rep Power: 110
ghorrocks is a jewel in the roughghorrocks is a jewel in the roughghorrocks is a jewel in the roughghorrocks is a jewel in the rough
If it runs serial but not parallel the first thing to try is a different partitioning algorithm to attempt to move the partitions away from critical areas.

I was not aware you could accelerate the VF equations by themselves.
ghorrocks is offline   Reply With Quote


Thread Tools
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 On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Simulation of varying contact angles for a large droplet of water on a surface cp703 CFX 5 July 20, 2013 06:08
Problem Concerning free surface wave simulation michaels STAR-CCM+ 3 February 25, 2011 08:28
How to define size of domain for free surface simulation? Sunya Main CFD Forum 2 June 8, 2009 23:33
VOF simulation free surface caused by gas inject rensb FLUENT 4 July 20, 2006 04:45
turbulence simulation and free surface vineet Main CFD Forum 3 September 23, 2001 11:25

All times are GMT -4. The time now is 09:39.