Fluent 6.2 slower than 6.122?

April 13, 2005, 23:41

Hi guys,

I recently upgraded to 6.2 from 6.122. If I run exactly the same case with the same settings in 6.2 - it estimates 14hours for 3000 iterations....while 6.1.22 estimates 10 hours !

Thats 4 hours difference ! Any comments, suggestions? Why is 6.2 running slower?

April 14, 2005, 16:41

Is it *actually* running slower, is is it just a bad estimate?

April 14, 2005, 19:18

After checking again, I think the estimates are off in the beginnning. I can start the same case several times and the estimates will be way out.

I do not know what is causing this, but if it does it, all I do is restart and rerun and then it seems to be better.

April 14, 2005, 23:29

If you're using Windoze, you should place as little confidence as you can on the time for iteration statistics.

April 15, 2005, 17:44

Definetly. With the Eulerian model, which is the model I use more often, it's slower.

ap

April 13, 2005, 23:41	Fluent 6.2 slower than 6.122?	#1
Riaan Guest Posts: n/a	Hi guys, I recently upgraded to 6.2 from 6.122. If I run exactly the same case with the same settings in 6.2 - it estimates 14hours for 3000 iterations....while 6.1.22 estimates 10 hours ! Thats 4 hours difference ! Any comments, suggestions? Why is 6.2 running slower?

April 14, 2005, 16:41	Re: Fluent 6.2 slower than 6.122?	#2
Evan Rosenbaum Guest Posts: n/a	Is it actually running slower, is is it just a bad estimate?

April 14, 2005, 19:18	Re: Fluent 6.2 slower than 6.122?	#3
Riaan Guest Posts: n/a	After checking again, I think the estimates are off in the beginnning. I can start the same case several times and the estimates will be way out. I do not know what is causing this, but if it does it, all I do is restart and rerun and then it seems to be better.

April 14, 2005, 23:29	Re: Fluent 6.2 slower than 6.122?	#4
pUl\| Guest Posts: n/a	If you're using Windoze, you should place as little confidence as you can on the time for iteration statistics.

April 15, 2005, 17:44	Re: Fluent 6.2 slower than 6.122?	#5
ap Guest Posts: n/a	Definetly. With the Eulerian model, which is the model I use more often, it's slower. ap

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Modelling steam-dry reforming of methane in FLUENT 6.2.	Talliks	FLUENT	0	March 2, 2010 06:55
Fluent 12.0 is worst then Fluent 6.2	herntan	FLUENT	5	December 14, 2009 02:57
Fluent 6.2 and 6.3 compatibility	Ale	FLUENT	0	July 31, 2008 03:47
Implementing own PDF in to fluent 6.2 and higher	Paul	FLUENT	0	August 6, 2007 10:47
Fluent 6.2 or 6.0?	oliver	FLUENT	0	June 12, 2007 11:17