about far field bounary condition
hi every body . is far boundary condition treatment depends on which numerical scheme will be use ?
I heard that if the scheme is upwind scheme it is enough to use initial boundary condition ( free stream condition ) as far field boundary condition. for example when using two dimensional unsteady euler equation to solve steady one. best regards CFD sutdent 
Re: about far field bounary condition
Characteristic boundary condition is commonly used.

Re: about far field bounary condition
Thanks versi for reply Do you know some good reference about Characteristic boundary condition?
best regrads 
Re: about far field bounary condition
See, for example, the following review paper on nonreflective boundary conditions:
Givoli, 1991, Journal of Computational Physics, vol. 94, page 1. 
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