calculation speed of fluent

Weiqiang Liu · December 19, 2018, 11:36

hello all,

I have a question of computation speed with fluent. The specification of my desk top is AMD Ryzen 7 1700X eight core processor and 8 GB ram. When I calculate methane catalytic combustion with detail mechanism, the iteration is very slow.

however, the usage of CPU and RAM is not very high while computing. Can anybody give me some suggestion?

by the way, I am using series solver of fluent.

thanks

weiqiang

LuckyTran · December 19, 2018, 11:41

The serial solver uses only 1 process so your other 7 processors will be idle. Run parallel with 8. You only occupy as much RAM as your calculation needs. You can only check the usage of RAM capacity, not bandwidth so it's difficult to know if the RAM is being underutilized unless you run a really big problem.

Weiqiang Liu · December 19, 2018, 11:42

Quote:

Originally Posted by LuckyTran

The serial solver uses only 1 process so your other 7 processors will be idle. Run parallel with 8.

ok, I get it. thanks very much

Weiqiang Liu · December 19, 2018, 14:36

Quote:

Originally Posted by LuckyTran

The serial solver uses only 1 process so your other 7 processors will be idle. Run parallel with 8. You only occupy as much RAM as your calculation needs. You can only check the usage of RAM capacity, not bandwidth so it's difficult to know if the RAM is being underutilized unless you run a really big problem.

you're amazing. you even know the number of cores of my computer!!!

December 19, 2018, 11:36	calculation speed of fluent	#1
Weiqiang Liu Senior Member Weiqiang Liu Join Date: Feb 2018 Posts: 278 Rep Power: 9	hello all, I have a question of computation speed with fluent. The specification of my desk top is AMD Ryzen 7 1700X eight core processor and 8 GB ram. When I calculate methane catalytic combustion with detail mechanism, the iteration is very slow. however, the usage of CPU and RAM is not very high while computing. Can anybody give me some suggestion? by the way, I am using series solver of fluent. thanks weiqiang

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December 19, 2018, 11:41		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,752 Rep Power: 66	The serial solver uses only 1 process so your other 7 processors will be idle. Run parallel with 8. You only occupy as much RAM as your calculation needs. You can only check the usage of RAM capacity, not bandwidth so it's difficult to know if the RAM is being underutilized unless you run a really big problem.