Analysis of the convergency characteristics of simple algorithm with the choices of dependant variables and cell face velocity 求解变量与离散体元界面速度选择对SIMPLE算法收敛特性的影响分析
With the choices of dependant variables and cell face velocity, the convergency speed and computational accuracy of SIMPLE algorithm employed in the computation of complex flows are analyzed. 针对复杂区域中流动计算的SIMPLE算法,在选用不同的速度分量作为求解变量和离散体元的界面速度时,进行了算法收敛速度及收敛准确性的对比分析。
The rotational flux due to the rotating frame can be calculated exactly for each cell face using the Stokes theorem. 由于坐标系旋转引入的旋转通量能由网格单元面上Stokes定理精确得出。
The main feature of the algorithm is that the pressure and pressure correction equations are obtained by explicitly treating pressure cross-derivatives terms in interface contravariant velocities. A collocated arrangement of variables is introduced on numerical grids, and the cell face velocities are calculated by the momentum interpolation. 该算法的特点是显式处理界面速度中的压力交叉导数项,得出压力与压力修正方程,使得压力及压力修正值与界面逆变速度直接耦合。
Furthermore, if people become too reliant on the use of cell phones, our face to face skills may decline. 手机发出的辐射对健康不利。而且,如果人们过于依赖手机,那么我们面对面交往的能力会下降。