Periodic pressure B.C. on collocated SMAC code
Hi all,
I'd like to know how to set peridoic pressure B.C. on collocated SMAC FVM. Currently, I'm writing LES code in a square duct using SMAC method on hexahedral meshs. For the stream direction (x direction), I hope to set periodic boundary conditions, and I was just thinking to set at the cell faces of both inlet and exit cells like below: uf_inlet = uf_exit = 0.5*(u_inlet + u_exit), vf_inlet = vf_exit = 0.5*(v_inlet + v_exit), wf_inlet = wf_exit = 0.5*(w_inlet + w_exit), Tf_inlet = Tf_exit = 0.5*(T_inlet + T_exit) (temperature or some scalars). (Note thet "f" shows cell-face values, and others are cell-center values) But for pressure P and potential Phi ? For pressure P, pf_inlet = pf_exit = 0.5*(p_inlet + p_exit) would not be an adequate condition because of the pressure loss by the duct walls . Also for and potential Phi, I wonder if Phif_inlet = Phif_exit = 0.5*(Phi_inlet + Phi_exit) could be used in the solver of poisson eqn. of potential Phi. Does anyone tell me? :confused: Sincerely yours, waku2005 |
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