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Introduction to Computational Fluid Dynamics (CFD) - page 23 / 47

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Solvers and numerical parameters

Solvers include: tridiagonal, pentadiagonal solvers, PETSC solver, solution-adaptive solver, multi-grid solvers, etc.

Solvers can be either direct (Cramer’s rule, Gauss elimination, LU decomposition) or iterative (Jacobi method, Gauss-Seidel method, SOR method)

Numerical parameters need to be specified to control the calculation.

Under relaxation factor, convergence limit, etc.

Different numerical schemes

Monitor residuals (change of results between iterations)

Number of iterations for steady flow or number of time steps for unsteady flow

Single/double precisions

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