Numerical Simulation Of Flow Field Using Unstructured Multigrid Algorithm

In the field of numerical simulation of fluid flow, multigrid algorithm is an effective way to accelerate the convergence. In this paper, applications of the principles of the multigrid approach to unstructured mesh problems are described. Both the overlapping multigrid algorithm and the agglomeration multigrid algorithm have been illustrated and examples of practical applications have been given. Especially for the agglomeration multigrid algorithm, a new robust method to generate coarse grids has been developed, by which we can generate coarse meshes with good quality. When the multigrid algorithm is applied, the finite volume method is adopted on each layer to solve the Euler equations.Besides, in subsequent sections, some research about the related software engineering and visualization of data is dealt with.