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>Verification of the Standard Model of Shear Stress Transport and Its Modified Version That Takes into Account the Streamline Curvature and Estimation of the Applicability of the Menter Combined Boundary Conditions in Calculating the Ultralow Profile Drag for an Optimally Configured Cylinder-Coaxial Disk Arrangement
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Verification of the Standard Model of Shear Stress Transport and Its Modified Version That Takes into Account the Streamline Curvature and Estimation of the Applicability of the Menter Combined Boundary Conditions in Calculating the Ultralow Profile Drag for an Optimally Configured Cylinder-Coaxial Disk Arrangement
A modification of the popular model of shear stress transport aimed at calculating the separation flow of an incompressible viscous liquid is justified. The modification eliminates the nonphysical pumping of the vortex viscosity in the cores of large-scale vortices. It has been verified with regard to the influence of the streamline curvature on the vortex viscosity by introducing a reciprocal linear function of the turbulent Richardson number with the Isaev-Kharchenko-Usachov constant equal to 0.02. Verification is based on solving the test problem an axisymmetric steady flow about a disk-cylinder tandem with an optimally configured nose, which has an ultralow profile drag for a Reynolds number of 5 x 10(5). It has been shown that the Menter combined boundary conditions are valid if y(+) y of the wall does not exceed two.
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机译:有理由对旨在计算不可压缩粘性液体分离流的剪切应力传输流行模型进行修改。该修改消除了大型旋涡芯中旋涡粘度的非物理泵送。通过引入湍流理查森数的倒数线性函数(Isaev-Kharchenko-Usachov常数等于0.02),验证了流线曲率对涡流粘度的影响。验证是基于解决测试问题而进行的,即具有优化配置鼻部的圆盘圆柱体串联的轴对称稳定流,其雷诺数为5 x 10(5)的超低轮廓阻力。已经表明,如果墙的y(+)y不超过2,则Menter组合边界条件有效。
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