CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > Siemens > STAR-CCM+

Floating Point Exception When I Add Rotation RBM

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

LinkBack Thread Tools Search this Thread Display Modes
Old   June 5, 2020, 11:06
Default Floating Point Exception When I Add Rotation RBM
New Member
Join Date: Jun 2020
Posts: 1
Rep Power: 0
akif_name is on a distinguished road
Hello, I am trying to run a simulation for a pump jet model. I drawed the geometry in Rhino and imported as parasolid.


In the ss above, there are two bladed geometries. Left one is stator, right one is impeller. Impeller is inside a cylinder volume which I am trying to give a rotation. There are two regions one being that cylinder which has the impeller substracted from it and the other one is rest of the geometry cylindirical region being substracted from it.

Simulation works fine when there is no rotating parts. But when I give a rotation to that cylindirical region, it gives floating point exception error.

I think the problem is that whatever I do, the mesh between the two regions always have some small gaps in between.

But I am not sure of that. What else could cause this problem? Please help out this is my thesis and my time is running out...

Last edited by akif_name; June 5, 2020 at 17:44.
akif_name is offline   Reply With Quote

Old   July 6, 2020, 22:33
Senior Member
Join Date: Mar 2009
Posts: 463
Rep Power: 16
ping is on a distinguished road
sounds like an interface issue so you need to check quality of the mesh across this as it rotates using the various ways to check interfaces - visual, report etc.
also run it as a moving reference frame rotating region first in steady state mode - maybe you have done this - and then restart from that solution since the sudden imposition of fluid motion might cause the crash.
ping is offline   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
icoFoam floating point exception (8) leizhao512 OpenFOAM Running, Solving & CFD 7 November 1, 2018 11:43
Floating point exception error after icoFoam Deepacfd OpenFOAM Bugs 1 February 10, 2017 05:35
A floating point exception has occurred: floating point exception [Overflow]. starlight STAR-CCM+ 4 May 4, 2016 09:08
A floating point exception - SEM Model yansheng STAR-CCM+ 1 April 4, 2016 04:57
Floating point exception from twoPhaseEulerFoam openfoammaofnepo OpenFOAM Running, Solving & CFD 1 March 19, 2016 13:56

All times are GMT -4. The time now is 10:14.