差分方程组 meaning in Chinese
system of difference equation
Examples
- The numerical models with the wall impulse as initial perturbation of turbulent spots were proposed . the above compact difference systems are used in the several typical flows , such as . the channel , open - channel and boundary layer flows the various complicated boundary conditions satisfying n - s equations are carefully conducted
建立了以壁面脉冲为初始扰动的湍斑数学模型,并将导出的navier - stokes方程的紧致差分方程组应用于槽道、明渠和平板边界层等典型流动,提出了严格满足navier - stokes方程的边界条件。 - The fourth - order explicit upwind - biased compact difference schemes are used in the spatial discretization of the nonlinear convection terms . these difference schemes can be used in all computational region including the boundary neighborhood , and can overcome the difficulty not adapting simultaneously in the boundary neighborhood for general three - dimensional fourth - order central difference schemes , and improve computational stability a nd resolution . the compact difference equations with high accuracy and resolution for solving the incompressible n - s equations and perturbation equations are composed of these compact difference schemes , and provides an effective numerical method for the investigations of the turbulent spots and coherent structures
文中发展了四阶时间分裂法用于navier - stokes方程及其扰动方程的时间离散;对分裂得出的关于压力的poisson方程和关于速度的helmholtz方程,建立三维耦合四阶紧致迎风差分格式;这些格式适用于包括邻近边界点在内的计算区域,克服了三维各自用四阶中心差分格式离散不适用于边界邻域的困难,并提高了稳定性和分辨率,用这些格式分别组成了数值求解navier - stokes方程及其扰动方程的高精度、高分辨率的紧致差分方程组,为湍斑及湍流相干结构的研究提供了有效的数值方法。