19.17. Using the Local Pseudo Time Step Method with the Pressure-Based Coupled Solver

When using the pressure-based coupled solver, you can select Local Time Step from the Pseudo Time Method drop-down list (for either steady-state or transient simulations) by performing the following steps:

  1. Enable beta feature access (as described in Introduction).

  2. In the General task page, select the Pressure-Based solver, with either Steady or Transient selected from the Time list.

     Setup →   General

  3. Go to the Solution Methods task page (Figure 19.6: The Solution Methods Task Page).

     Solution →   Methods

    Figure 19.6: The Solution Methods Task Page

    The Solution Methods Task Page

    1. Select the Coupled scheme under Pressure-Velocity Coupling.

    2. Select Local Time Step from the Pseudo Time Method drop-down list.

  4. In the Solution Controls task page, enter a value for the Pseudo Time Courant Number that will produce an appropriate local pseudo time step size for each cell in the domain (see Local Time Step Method in the Theory Guide).

     Solution →   Controls

Note:

  • The Local Time Step method is not available with the following:

    • the density-based solver

    • the structural model

    • multiphase models

    • the G Equation model (as part of the premixed or partially premixed combustion model)

    • the crevice model

    • Non-Iterative Time Advancement (NITA)

  • The Local Time Step method is not supported with the species transport model when the energy equation is disabled.