CFD Online Logo CFD Online URL
Home > Forums > CFX

ERROR #001100279,Floating point exception:Overflow

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

LinkBack Thread Tools Display Modes
Old   January 7, 2008, 09:13
Default ERROR #001100279,Floating point exception:Overflow
sohail ahmed
Posts: n/a
I am trying to simulate a centrifugal pump stage with transient conditions. In this case, Massflowrate and rotating speed of impeller are changing with time. I have set Total time = 1 hr and Time step= 1 min. Maximum coefficient loops are set to 3.

Unfortunately, I am getting Following error:

ERROR #001100279 has occurred in subroutine ErrAction. | | Message: | | Floating point exception: Overflow

Can anyone help me out plz.


  Reply With Quote

Old   January 7, 2008, 18:14
Default Re: ERROR #001100279,Floating point exception:Over
Glenn Horrocks
Posts: n/a

Your timesteps sound very large for a typical pump. Read the documentation section about Best practices for turbomachinery to give you some pointers.

Glenn Horrocks
  Reply With Quote

Old   January 8, 2008, 11:55
Default Re: ERROR #001100279,Floating point exception:Over
sohail ahmed
Posts: n/a
Dear Glenn Horrocks,

Reducing time step to 1 second eliminate this error. But If I have to simulate transient behavior of my pump for 3 hours, this means total 60 x 60 x 3 = 10,800 time step iterations and with inside coefficient loop iterations, this problem becomes HUGE!. Any suggestion and idea to simulate pump transient behavior in reasonable time?
  Reply With Quote

Old   January 8, 2008, 17:24
Default Re: ERROR #001100279,Floating point exception:Over
Glenn Horrocks
Posts: n/a

Why do you need to run for 3 hours? Surely the pump reaches steady state way before then.

Also, in CFD sometimes you just have to run huge problems. That is why CFD is run on supercomputers.

Glenn Horrocks
  Reply With Quote

Old   July 14, 2010, 02:18
Default ERROR #001100279,Floating point exception:Over
New Member
M. A.
Join Date: Jul 2010
Posts: 27
Rep Power: 7
motahar is on a distinguished road
Hi friends,

I'm simulating a vver-1000 reactor pressure vessel.
When I give pressure change to the interface boundaries, I encounter the same error of overflow.
I'm using the k-e model, and because I'm analyzing the heat transfer in the reactor, I have to use k-e model.
I change the turbulent model to SST and it answered, but can anybody helps me how to solve my problem when using k-e model.

Waiting for your help!
motahar 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
block-structured mesh for t-junction Robert@cfd ANSYS Meshing & Geometry 20 November 11, 2011 05:59
Problem with UDF compiling for kTkLW model Wantami FLUENT 0 July 18, 2011 05:11
Point flow exception:overflow Jwala CFX 6 January 29, 2009 03:08
Gmsh and samplesurface touf Open Source Meshers: Gmsh, Netgen, CGNS, ... 2 December 10, 2007 03:27
CFX4.3 -build analysis form Chie Min CFX 5 July 12, 2001 23:19

All times are GMT -4. The time now is 20:54.