Number of elements x double precision

matheusguzella · October 2, 2009, 15:36

I'm running a simulation of wind tunnel and have a question related to the number of elements and double precision. On the computer that I'm running it's possible to run (without double precision) a mesh with 3 million elements (maximum). I'm worried about the results (because of single precision) so I decreased the mesh to 1.5 million to run it with double precision. It's always good to perform a simulation with high number of elements? Double precision is always important or it's better to use a higher mesh and run with single precision?

Thanks!

PSYMN · October 5, 2009, 11:53

What is your solver? Mesher? Application?

matheusguzella · October 7, 2009, 11:15

Quote:

Originally Posted by PSYMN

What is your solver? Mesher? Application?

Sorry:

Solver: ANSYS CFX Solver
Mesher: ANSYS (Advanced meshing)
Application: I'm need to validate experimental results (academic purposes).

October 2, 2009, 15:36	Number of elements x double precision	#1
matheusguzella New Member Matheus Guzella Join Date: Jun 2009 Posts: 12 Rep Power: 17	I'm running a simulation of wind tunnel and have a question related to the number of elements and double precision. On the computer that I'm running it's possible to run (without double precision) a mesh with 3 million elements (maximum). I'm worried about the results (because of single precision) so I decreased the mesh to 1.5 million to run it with double precision. It's always good to perform a simulation with high number of elements? Double precision is always important or it's better to use a higher mesh and run with single precision? Thanks! Last edited by matheusguzella; October 3, 2009 at 12:15.

October 5, 2009, 11:53	Details please...	#2
PSYMN Senior Member Simon Pereira Join Date: Mar 2009 Location: Ann Arbor, MI Posts: 2,663 Blog Entries: 1 Rep Power: 47	What is your solver? Mesher? Application?

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