Turbulence

Turbulent flows are abundant in engineering and nature. QuickerSim CFD Toolbox for MATLAB® provides basic RANS (Reynolds-Averaged Navier-Stokes) turbulence models.

For now, those include:

  • van Driest
  • k-l  Prandtl’s mixing length
  • Srebric (for environmental turbulence)
  • CITM

The Toolbox contains Boundary-Layer generating functions that can be used to generate appropriate mesh in the solid-wall vicinity after external mesh has already been read. They are crucial in proper resolving of turbulent

Turbulent models can be also linked with convective heat transfer or passive scalar transport. In this way one obtains a basic tool of engineering interest. That enables design of heat exchangers or Heat, Ventilation and Air Conditioning (HVAC) cases.

Case 1: Simulation of the flat plate boundary layer development using the van Driest model. Velocity profile, computational mesh and comparison to reference data shown.

Case 2: Simulation of the backward facing step with the Prandtl’s k-l model. Horizontal velocity and turbulence intensity visualized.