fluent计算潜艇尾舵水动力性能应采用怎样的湍流模型

陈小山0109

计算经过缩尺的2.6米的潜艇，弦长为0.1米的尾舵的水动力性能（升力，阻力），为达到临界雷诺数，速度设为10m/s，雷诺数近似为2*10^7，请问应该选用k-omega模型还是k-epsilon模型。如果采用k-omega模型，是否要画边界层网格？如果画边界层，使用Viscous Grid Spacing Calculator 时y+取多少合适？谢谢

ringtail

FYI
Standard k–ε         Robust. Widely used despite the known limitations of the model. Performs poorly for complex flows involving severe pressure gradient, separation, strong streamline curvature. Suitable for initial iterations, initial screening of alternative designs, and parametric studies.
Realizable k–ε*         Suitable for complex shear flows involving rapid strain, moderate swirl, vortices, and locally transitional flows (e.g. boundary layer separation, massive separation, and vortex shedding behind bluff bodies, stall in wide-angle diffusers, room ventilation).
RNG k–ε         Offers largely the same benefits and has similar applications as Realizable. Possibly harder to converge than Realizable.
Standard k–ω         Superior performance for wall-bounded boundary layer, free shear, and low Reynolds number flows. Suitable for complex boundary layer flows under adverse pressure gradient and separation (external aerodynamics and turbomachinery). Can be used for transitional flows (though tends to predict early transition). Separation is typically predicted to be excessive and early.
SST k–ω*         Offers similar benefits as standard k–ω. Dependency on wall distance makes this less suitable for free shear flows.

通常，k-e+标准近壁函数，Y+大概30+左右
           k-w 一般要求y+ 1左右
具体，参阅FLUENT的用户手册
无论哪种RANS模型，一般都是需要边界层网格的吧？

陈小山0109

谢谢！