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

high CPU load with no computation going on & Pressure coefficient output problem

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

LinkBack Thread Tools Search this Thread Display Modes
Old   September 30, 2011, 05:25
Post high CPU load with no computation going on & Pressure coefficient output problem
New Member
Join Date: Sep 2011
Posts: 1
Rep Power: 0
spetsnaz26 is on a distinguished road
Hi, everyone. I'm new to Fluent. On my 4-core, 8-thread machine Fluent somehow uses the same CPU resources regardless of its state (computing or idling). I noticed this when once, after computation has converged, I checked Window's task manager and found to my surprise that 8 Fluent processes were still very much there and took all my CPU. Is this...normal? What CPU resource could Fluent possibly need when it's idling??

Another, seperate, problem with output data:
After calculating an inviscid, incompressible solution on an aircraft 3D flow field, I checked out Fluent's built-in display tool and was again suprised: instead of being on the order of -5.0~+5.0 that I expected to see, pressure coefficient spans the incredible range of -2500~+3500. I checked static pressure and found it spans from -2200~+1800. While the later could be "gauge pressure", how could the calculation of Cp be wrong?
spetsnaz26 is offline   Reply With Quote


cpu load, pressure coefficient

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 in the CFX12.1 parallel computation BalanceChen ANSYS 2 July 7, 2011 10:26
natural convection mehrdadeng CFX 10 February 25, 2011 05:25
Tutorial problem: "rhopSonicFoam - shockTube" with high pressure shangzung OpenFOAM 0 November 1, 2009 13:07
Hydrostatic pressure in 2-phase flow modeling (long) DS & HB Main CFD Forum 0 January 8, 2000 15:00
Problem in Result of the pressure coefficient Ken Choi Main CFD Forum 2 March 15, 1999 04:15

All times are GMT -4. The time now is 13:50.