Introduction to CFX -Solver Settings

•Initialization

•Solver Control

•Output Control

•Solver Manager

Note: This chapter considers solver settings for steady-state simulations. Settings specific to transient simulation are discussed in a later chapter.

•Iterative solution procedures require that all solution variables are assigned initial values before calculating a solution

•A good initial guess can reduce the solution time

•In some cases a poor initial guess may cause the solver to fail during the first few iterations

•The initial values can be set in 3 ways:

1.Solver automatically calculates the initial values

2.Initial values are entered by the user

3.Initial values are obtained from a previous solution

•Initial values can be set on a per-domain basis or globally for all domains

•Insert Global Initialisation from the toolbar or by right-clicking on Flow Analysis 1

•Edit each Domain to set initial values on a per-domain basis

–When both are defined the domain settings take precedence

–Solid domain must have initial conditions set on a per-domain basis

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