The Rotating Machinery, Turbulent Flow, Algebraic yPlus (spf) interface (), found under the Single-Phase Flow>Rotating Machinery branch () when adding a physics interface, is used to simulate flow at high Reynolds numbers in geometries with one or more rotating parts. The physics interface is suitable for incompressible, weakly compressible and compressible flows at low Mach numbers (typically less than 0.3).

Two study types are available for this physics interface. Using the Time Dependent with Initialization study type, the rotation is achieved through moving mesh functionality, also known as sliding mesh. Using the Frozen Rotor with Initialization study type, the rotating parts are kept frozen in position, and the rotation is accounted for by the inclusion of centrifugal and Coriolis forces. Both study types includes an initial Wall Distance Initialization step in order to compute the wall distance. See Theory for the Rotating Machinery Interfaces .

When this physics interface is added, the following physics nodes are also added in the Model Builder under Turbulent Flow, Algebraic yPlus — Fluid Properties, Wall and Initial Values. A Moving Mesh interface with a Rotating Domain node is added automatically in the Model Builder under the Definitions node. Then, from the Physics toolbar, add other nodes that implement, for example, boundary conditions and volume forces. You can also right-click Turbulent Flow, Algebraic yPlus to select physics features from the context menu. For information about the available physics features, see Domain, Boundary, Point, and Pair Nodes for the Rotating Machinery Interfaces.

A part for the settings below, see the advanced settings for The Rotating Machinery, Laminar Flow Interface, and The Creeping Flow, Laminar Flow, Turbulent Flow, and Large Eddy Simulation Interfaces.

The turbulence model parameters for the Algebraic yPlus model, κa and Ba, have been optimized for turbulent pipe flow. For certain cases, better performance can be obtained by tuning the model parameters.