turbulence-models-db

To select a turbulence model for CFD simulations, evaluate your flow type, mesh capabilities, and physics goals against a catalog of models like k-epsilon, k-omega SST, or LES. The database provides decision criteria and best-practice guidance for matching model families to specific simulation setups.

The difference between k-epsilon and k-omega SST for external flows lies in their wall treatment and separation prediction. The database outlines model strengths and limits, recommending k-omega SST for separation-prone cases and providing validation test cases to compare their applicability.

You can use LES turbulence models for heat transfer simulations in OpenFOAM by following the database's compatibility guidelines. It provides specific decision support for LES and DES workflows, including mesh requirements and wall treatments for heat transfer cases.

Mesh requirements and y+ values for Spalart-Allmaras models depend on the target wall treatment. The database specifies necessary y+ ranges and mesh constraints for each turbulence model to ensure accurate resolution of internal and external flows.

You should use RSM turbulence models instead of RNG k-epsilon for swirling flows when strong anisotropy is present. The database provides best-practice decision criteria and reference data to determine when model families like RSM are necessary for rotating and swirling flow cases.

The turbulence model database provides recommended constants and validation test cases applicable across common CFD packages including ANSYS Fluent. It specifies scope such as reference data and model applicability to inform model setup and configuration.