Rotating Machinery Analysis

Ansys has a full suite of advanced technologies that allow for timely and accurate modeling of rotating machinery.

The rotating frame of reference formulation of the Navier-Stokes equations is used to include the motion of rotating components like rotors, impellers, and mixers. This method does not require a remesh to capture the motion coupling to the standard stationary formulation of the Navier-Stokes equations. 

This process allows Ansys CFD software to accurately capture the fluid motion, and therefore performance, of rotating machinery like pumps, mixing tanks, fans, compressors, and turbines. Ansys technologies include advanced turbulent models, like the mentor laminar-transitional SST turbulent model, that have a long history of validated use in modeling rotating machinery. The real gas properties of the fluid can be included along with multiphase effects like cavitation to accurately calculate on and off design performance.

CFD Consulting Projects

Electrical Submersible Pump

Modeled the turbulent, single, and multiphase flow conditions in several electric submersible pumps using the advanced multiple frames of reference models in Ansys CFX to improve the pump’s performance.

Industrial Fan

Evaluated the effectiveness of different geometric fan design changes for a turbulent compressible application.

Pharmaceutical Mixing Tank

Calculated the species transportation and mixing time for a transient turbulent impeller-stirred bioreactor tank with different injection scenarios.

Underwater Turbine

Predicted the underwater turbine performance and the impact of the transient vortex shedding on the structural support.

Blood Pump Modeling

Predicted the hydraulic performance, flow residence time, and relative hemolysis levels for a centrifugal blood pump over intended range of use; incorporated Cross Non-Newtonian blood viscosity and Eulerian-based hemolysis generation models.