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Curvilinear Coordinate Method for the Solutions of Initial Value Problems Using the Third-Order Upwind Differencing Scheme

机译:利用三阶迎风差分格式求解初值问题的曲线坐标法

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A calculation procedure to solve highly unsteady incompressible Navier-Stokes equations in arbitrary shapes is presented. The boundary-fitted curvilinear coordinate system is used to generate a coordinate surface coincident with the boundary contours in the physical plane. A second-order forward difference approximation is used for the time derivative and a third-order upwind differencing method for the convective terms which suppress the instabilities is used. The third-order method for the space derivatives is based on the quadratic upstream interpolation for convective kinematics (QUICK) algorithm. The solutions for a time-marching square cavity flow and a channel flow with a bump at the Reynolds number of 10 to the 4th are obtained.

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