摘要
用时间相关法、LU SGS隐式求解经过预处理后的二维可压Navier Stokes方程 ,数值模拟了低速情况下不同马赫数、不同雷诺数的驱动空腔流动。为了使时间相关法能应用于计算低速流动及加快收敛 ,在控制方程的时间导数项前乘了一个预处理矩阵 ,实现了对方程的预处理。数值模拟结果表明 ,预处理确实加快了计算的收敛性 ,而定常解却没有改变。
The time dependent method&LU SGS implicit scheme has been used to solve 2D compressible Navier Stokes equations which are preconditioned and simulate the driven cavity flow field at different low Mach numbers and different Reynold numbers. To apply the time dependent method to simulate the flow field at low speeds validly and accelerate the convergence rates, a matrix called preconditioning matrix has multiplied the time derivative terms of Navier Stokes equations. This is known as preconditioning. Convergence rates are accelerated for a certainty, while providing solutions are identical to those obtained without preconditioning methods. The results are compared with available data.
出处
《国防科技大学学报》
EI
CAS
CSCD
2000年第1期89-93,共5页
Journal of National University of Defense Technology
基金
中科院大气物理所资金
