[petsc-users] How to solve the pressure possion equations with four neuman bc

[Jed Brown]

丁老师 <ztdepyahoo at 163.com> writes:

> Dear friends:
>      In the projection method for the solution of incompressible flow,  a pressure equation with four neuman bcs need to be solved. 
> but the pressure matrix is singular. it gives divergence solution.  how to solve this kind of equations.

See the users manual section on solving singular systems.
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