## 15.5. Advection Scheme Selection

This section describes the Basic Settings tab in the Solver Control panel in ANSYS CFX-Pre and how to choose these settings for your simulation.

You can select to use `Upwind`, `High Resolution`, or specify a blend factor to blend between first and second order advection schemes to calculate the advection terms in the discrete finite volume equations. Different schemes can be applied to each equation class by setting the Equation Class Settings in CFX-Pre.

The CDS Blending settings are available for the DES and SAS turbulence models only. They control the Courant-number-based blending between the specified advection scheme and the central difference scheme (CDS).

Additional information on the advection schemes used in ANSYS CFX is available; for details, see Advection Term in the CFX-Solver Theory Guide.

Release 18.2 - © ANSYS, Inc. All rights reserved.