Problem with Linear System -- CFD Online Discussion Forums

October 20, 2018, 15:16	Problem with Linear System	#1
IbizaFR Member E Join Date: Mar 2018 Posts: 77 Rep Power: 8	Hello to everyone, I am modeling unsteady flow in prismatic open channel with St Venant equations and implicit finite difference scheme. Trying to solve the linear system of equations with direct method I receive the message: Matrix is singular, close to singular or badly scaled. I know that the inversion of the matrix is impossible to be done due to ill-conditioning of matrix. How can I solve this problem? Thank you.

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