[Dadou]

Dear everyone,

I start working in a company and they don't use OpenFOAM but they want to run some test cases to see if it worths using it.
So, I have installed it on my computer (Ubuntu virtualbox) just to run some tests and show to the boss it's capacity.
Now they want to install it on the their server, so they need to know what kind of CPU/GPU, RAM they need to run a "big" OpenFOAM test (by big I mean with more then 5,000,000 elements).

Thank you and hope someone can help as quick as you can.

Dadou

[mechy]

you can see the tutorial cases of openfoam and you will find that OF can solve many CFD problems

for 5 millions elements I propose the following

RAM 16 Giga bayt
cpu core i7 intel 3.6 GHz
Graphics 4 Giga bytes

[skyinventorbt]

Originally Posted by Dadou

Dear everyone,

I start working in a company and they don't use OpenFOAM but they want to run some test cases to see if it worths using it.
So, I have installed it on my computer (Ubuntu virtualbox) just to run some tests and show to the boss it's capacity.
Now they want to install it on the their server, so they need to know what kind of CPU/GPU, RAM they need to run a "big" OpenFOAM test (by big I mean with more then 5,000,000 elements).

Thank you and hope someone can help as quick as you can.

Dadou

I am using HP Z800 workstation with Xeon processors(12 cores) 16Gb Ram, 2Gb Graphics card...
From my experience Ram you need is around a Gb per million cell for simulation alone.

Processors (100,000 cells per processor - for parallel processing)
-----------------------------------------------------------------------------------------------------------------
My suggestion would be a workstation of the configuration said above - (slow)
or
A cluster with 60~70 cores (relatively fast)

But these configurations also depend on the problem you are simulating...

--
KANNAN

[Dadou]

Originally Posted by skyinventorbt

I am using HP Z800 workstation with Xeon processors(12 cores) 16Gb Ram, 2Gb Graphics card...
From my experience Ram you need is around a Gb per million cell for simulation alone.

Processors (100,000 cells per processor - for parallel processing)

Hi,
what model of XEON?
100k cells per processor, per core or per thread?

Thanks

[skyinventorbt]

Originally Posted by Dadou

Hi,
what model of XEON?
100k cells per processor, per core or per thread?

Thanks

X5650
100k cells per core

--
KANNAN B T

[Dadou]

Thank you

Dadou

[eRzBeNgEl]

100k cells per core

100k, this is just a rule of thumb. In my cases OF scales up to 10k cells each cpu. So after investing in your workstation make a scalability study.......

[Dadou]

Originally Posted by eRzBeNgEl

100k, this is just a rule of thumb. In my cases OF scales up to 10k cells each cpu. So after investing in your workstation make a scalability study.......

Which case can be a good scalability study ?

[Kaskade]

Since it's highly case dependent, the test case should represent what you are trying to do later on.

[Dadou]

Originally Posted by Kaskade

Since it's highly case dependent, the test case should represent what you are trying to do later on.

Thank you, I'll try to find sth that is similar to the cases I'll have

Dadou