|October 21, 1999, 09:54||
Re: vortex street
I am doing simulations of 2D laminar (50 < Re < 150) flow past a fixed or moving cylinder. I use STAR-CD, but many others commercial codes can do it also. The problem is to have a good simulation of the karman street (correct Strouhal number and drag, pressure and lift coefficients for example).
I choosed STAR-CD than Fluent because when I started my reserach work, the version 4 of Fluent (only structured mesche) doesn't allow moving mesh with important amplitude. Also with STAR-CD you can compute streaklines.
In STAR-CD, which is a finite volume code, we can do unstructured meshes, so you have more possibilities in your simulation.
I have not any comparaison between STAR-CD and Fluent in this kind of simulation but STAR-CD gives good results in this intervale of Reynolds number.
For example : at Reynolds number of 100, you can see in most references that the Strouhal is beetween 0.164 and 0.167. With STAR-CD I find a Strouhal of 0.165 or 0.166, it depends on the time step and the numercial scheme.
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