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Computer Specification For The CFD Analysis

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Old   September 1, 2012, 15:54
Default Computer Specification For The CFD Analysis
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can someone please tell a good computer specification of the cfd analysis such as the meshing and the aerodynamics simulation, of an entire f1 car and an entire boeing 747 airplane?

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Old   September 6, 2012, 16:50
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Depends a little on your requirements regarding accuracy and turnaround time and also on the used code.

For meshing an entire F1 car (and also the B747) with a good resolution (assuming it's not just to play around but to get reasonable results), you'll need a big machine. I gained some F1 experience two years ago, using Star-CCM+. We created meshes with approx. 120 million cells for a symmetric model of a F1 car (only one half was meshed).
Memory will be the most important thing while computing power is less important. Most meshers will not benefit of many cores.
We had machines with 48GB ram, but that was not nearly enough to mesh the whole car in one portion. I would say, 96 to 128 GB is the minimum as long as other codes don't need significantly less memory.

For solving, I would stick to a cluster. Solving of a 120 million cells mesh on 256 cpu's took about 20 hours, so you can easily calculate the duration on let's say a dual Xeon E machine with 16 cores. It will not scale linear, therefore it will be faster than 320 hours, but it will be painful long.

When you don't have the money to buy a f...ing expensive cluster, there are plenty of offers to buy computing time. Amazon should be one of the best-known, but there are many others as well. Just browse the web, and sometimes you can find offers in the ad banners here on this site.
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Old   September 7, 2012, 10:58
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Quote:
Originally Posted by abdul099 View Post
Depends a little on your requirements regarding accuracy and turnaround time and also on the used code.

For meshing an entire F1 car (and also the B747) with a good resolution (assuming it's not just to play around but to get reasonable results), you'll need a big machine. I gained some F1 experience two years ago, using Star-CCM+. We created meshes with approx. 120 million cells for a symmetric model of a F1 car (only one half was meshed).
Memory will be the most important thing while computing power is less important. Most meshers will not benefit of many cores.
We had machines with 48GB ram, but that was not nearly enough to mesh the whole car in one portion. I would say, 96 to 128 GB is the minimum as long as other codes don't need significantly less memory.

For solving, I would stick to a cluster. Solving of a 120 million cells mesh on 256 cpu's took about 20 hours, so you can easily calculate the duration on let's say a dual Xeon E machine with 16 cores. It will not scale linear, therefore it will be faster than 320 hours, but it will be painful long.

When you don't have the money to buy a f...ing expensive cluster, there are plenty of offers to buy computing time. Amazon should be one of the best-known, but there are many others as well. Just browse the web, and sometimes you can find offers in the ad banners here on this site.
From all terms of the computer parts you had mentioned above, I only understand on memory. What is cluster and cells?
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Old   September 7, 2012, 14:41
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Quote:
Originally Posted by sefde View Post
From all terms of the computer parts you had mentioned above, I only understand on memory. What is cluster and cells?

http://en.wikipedia.org/wiki/Computer_cluster

by Cells, he means mesh cells.
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Old   September 22, 2012, 12:08
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Quote:
Originally Posted by rwryne View Post
http://en.wikipedia.org/wiki/Computer_cluster

by Cells, he means mesh cells.
Thank you.
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