When you want to use the Non-Iterative Time Advancement (NITA) scheme with a single-phase flow, hybrid NITA expert options are available that allow you to easily define a number of settings that are suitable for certain applications. These settings are designed to provide faster solver performance and better robustness without sacrificing accuracy. Depending on your case, the hybrid NITA expert settings may optimize NITA expert controls, explicit relaxation factors, and outer iterations.
To use the hybrid NITA expert options for a single-phase flow, perform the following steps:
Enable beta feature access (as described in Introduction).
Enter the following text command:
solve→set→nita-expert-controls→hybrid-nita-settingsYou will then be prompted to select from the following options:
0: This ensures no hybrid NITA expert options are used.1: This enables hybrid NITA settings that are recommended for flows with a constant density, such as LES simulations.2: This enables hybrid NITA settings that are recommended for flows with a variable density, such as combustion simulations.
If your selection results in a change to the settings, the changes will be printed in the console.