Karman vortex street
 

Dear All,

I would like to write a code that calculates the periodic force on a bluff body which is immersed in an unstable flow field. Can anyone direct me to possible techniques to achieve this? I am interested in easily programmable and elegant methods (possibly inviscid at high Re), no Navier Stokes solution or such.

Thanks in advance!

Hello,
what do you mean by an "unstable" flow field???
In general, if you are looking for a karman vortex street, you are talking about Euler equations in 2d (at least), so the easiest way to achieve that would be to program a finite volume 2d solver. Details can be found e.g. in the book by Blascek, though I forgot the title, maybe some else can help me here...

Discrete vortex method
 

Thanks for your reply. At the moment I am reading about the discrete vortex method, which looks a promising candidate, but I am still slightly confused about it. I am reading the paper by Chorin (1972). What I need to understand is how to get the forces on the body out of this analysis.