Calculating Peclet no. for problem
I need to calculate the Peclet no. to determine if an upwind scheme is better for my problem.
The Peclet no. is defined as LU/D
L = characteristic length, U = velocity, D the mass diffusion coefficient.
I am simulating a flow past an airfoil in air. Is U the inflow velocity?
L = airfoil length.
What about the mass diffusion coefficient? I only managed to get from wiki:
"Carbon dioxide in air has a diffusion coefficient of 16 mm2/s"
Hope someone can help. Thanks!
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