Rotating Machinery | CD-adapco
State-of-the-art meshing for easy simulation of rotating components
Rotating machinery lies at the heart of the biomedical device and pharmaceutical processing industries and state-of-the art meshing in STAR-CCM+ now makes it possible to accurately and easily simulate such motions.
  • STAR-CCM+ closes the gap between meaningful results and engineering design by automating your work-flow in a unique single integrated environment. Shown here is a CFD analysis with STAR-CCM+ on a medical ventilator
  • Tablet coating in a rotating drum : STAR-CCM+ was used to improve inter-particle coating uniformity by using optimal spraying equipment settings

For the past 30 years, the ability to perform Computational Fluid Dynamics simulations of rotating objects has been severely curtailed by the need to generate an interconnected mesh between the objects (for example between a rotating impeller and mixer geometry). Not only did this requirement make the creation of "moving mesh" simulations an intensive manual process, it also often rendered it impossible in the case of objects with very close interaction.

Advanced meshing in STAR-CCM+ provides two easy-to-use motion options for time-accurate simulations of rotating components:

Rigid body motion (sliding mesh)

Allows parts of the domain to rotate and/or translate and with respect to each other and uses a sliding interface at the boundaries, yielding time accurate flow data that includes the effects of transient interactions between components.

Overset mesh

Overset (Chimera) meshing allows bodies to move and rotate freely throughout the computational domain without being artificially constrained by the mesh, allowing the simulations of very close moving bodies. Separate overlapping meshes are used, a background mesh, and a body fitted mesh around the moving geometry of interest. The body and fitted mesh are then able to move freely without the need to re-mesh, and data is interpolated between the two meshes. This is a game-changing feature for the simulation of multiple moving objects.

Both the Rigid Motion and  Overset Mesh capability are fully compatible with the full range of unstructured meshing options in STAR-CCM+. With no need to worry about interconnecting meshes or cell distortion, this capability brings genuine moving object simulation within the grasp of all engineers.

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