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HiFiLES / HiFiLES-solver

High Fidelity Large Eddy Simulation Solver
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help for "Subsonic inflow characteristic" boundary cond #48

Closed bizhishui closed 9 years ago

bizhishui commented 9 years ago

Hi, I've run a case (2D, Ma~0.1) in which the inflow boundary condition is "Subsonic inflow characteristic". And I got the u-velocity champ with value 0.4 !=1 (0.4 is just an example, what count is it < 1 ) far away from key zone of simulation (i.e., the zone where all variables vary smoothly). I think it could be the inflow boundary condition for my problem. I've checked in the SU2 code (file solver_direct_tne2.cpp, line 4178), but I don't get any further information. Can, anyone, give me some references for this boundary condition? Thanks in advance! maxime LV

jewatkins commented 9 years ago

Hi maxime LV,

Are you simulating an internal or external flow? If you're simulating an external flow, try using the "Char" boundary condition. This should work as a nearfield or farfield boundary condition. The "Subsonic inflow characteristic" boundary condition can be used for internal flows. See "Numerical Computation of Internal and External Flows: The Fundamentals of Computational Fluid Dynamics" by Charles Hirsch for more detail.

-Jerry

bizhishui commented 9 years ago

Hi Jerry, Thanks. I'm simulating an external flow. I'll change the corresponding boundary to "Char", and to compare the results. Maxime

bizhishui commented 9 years ago

Hi Jerry, What your suggest do works. Thanks! Maxime

jewatkins commented 9 years ago

Great! I'm glad it worked. Let me know if you have anymore questions.

-Jerry