Fluent 6.2 slower than 6.122?

April 14, 2005, 00:41

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, 17:41

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

April 14, 2005, 20:18

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 15, 2005, 00:29

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

April 15, 2005, 18:44

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

ap

April 14, 2005, 00:41	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, 17:41	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, 20:18	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 15, 2005, 00:29	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, 18:44	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

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