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Coupled solver and multigrid
Hi,
Suppose we solve the momentum equation and continuation equation in each element sequencely ( which is called coupled solver), I want to apply the multigrid technique into this solver to accelarate the convergence, the discretization on the fine grid is via FEM ( Q1~/Q0 elememt), I have tried both algeraic and geometric multigrid, but both of them don't work. I want to ask the following questions: 1. How to make prolongation of the velcoity and pressure coeficients( Algebraic Multigrid)? 2. How to transfer the residual ( geometric multigrid)? 3. Are there any one who have experience in this area? I am desperatly struggling with these qustions (kidding) , anyone who can give some clues are sincerely appreciated. Thanks Hongliang Yang |

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