Solvers

On the Solver tab different solvers for velocity and pressure correction equation can be selected.

Note

Usually the defaults should not be changed.

Convection dialog, Solver tab 

Figure 48. Convection dialog, Solver tab

Item

Description

Velocity solver and Preconditioner

Determines which solver will be used, see Linear system equations solvers , default is STABBiCG.

The default preconditioner is ILU.

Pressure solver and Preconditioner

Determines which solver will be used, see Linear system equations solvers , default is GSSV.

The default preconditioner is ILU.

parameters

Specifies the parameters for the selected solver, left hand side for the velocity solver, right hand side for the pressure solver:

  • Max. inner iterations: Number of maximum allowed iterations needed to solve one linear system of equations, integer number, default is 1000.

  • Desired residuum: Desired accuracy of the computation, real number, default is 1e-12.

Related Procedures

Selecting solvers