Multiphase Reference Frames (MRF)

Most CFD applications include fluid moving around or inside of stationary objects. Meshes are hence fixed. Incompressible Steady Navier-Stokes equations are solved if the flow is incompressible. Flow inside of pipes and flow around airfoils are two very typical uses. Since the airfoil and pipe are stationary in both situations, the incompressible steady Navier-Stokes equations are used to solve the meshes.

A steady-state approach used in industrial computational fluid dynamics to model challenges with rotating components is the Moving Reference Frame (MRF) approach. It is thought to need less computer power while efficient enough for most industrial situations.

This strategy’s underlying principles are straightforward but elegant. During the meshing phase, a small volumetric zone of mesh cells is produced around the spinning body, and the MRF zone encompasses this area.

The MRF zone is rotated around the body’s axis while the body remains still during the simulation phase. In a reference frame that rotates or moves at the same speed as the rotating or moving geometry, governing equations are solved. On a physical level, it means that we see the flow field around the moving body while seated on it. The flow field becomes stable concerning the geometry as a result.

When a turbine is rotating and we are on the ground, the flow field surrounding the turbine seems transitory to us. If we sat on a turbine blade and rotated with it, instead of seeing it from a distance, the flow field around us or the turbine would appear stable.

To expand your knowledge about this method and its application in the industry and academic fields, you can enter the Moving Reference Frame (MRF) tab by clicking on the link to find more projects, for instance, using this method, the following simulation models a Water Turbine (Horizontal Axis).

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MR-CFD, an Expert in the Field of Sliding/Moving Mesh Simulations

With several years of experience simulating various problems in various CFD fields using ANSYS Fluent software, the MR-CFD team is ready to offer extensive modeling, meshing, and simulation services. Simulation Services for Moving Reference Frame are categorized as follows:

• Various types of horizontal and vertical axis wind turbine
• Various types and situations of Tidal turbines (two and three and four-bladed)
• Simulation of turbomachinery include (pumps, compressors, etc.)
• Airplane propeller CFD simulation
• Simulation turbofan and AFT fan
• Simulation of cavitation in Francis, Kaplan, and Pelton turbine
• Simulation of the rescue helicopter
• …

You may find the related products in the categories mentioned above in our CFD shop by clicking on the following link:

https://www.ansysfluent.ir/services/fluent-modules/moving-reference-frame/

Our services are not limited to the mentioned subjects, and the MR-CFD team is ready to undertake different and challenging projects ordered by our customers. You can consult with our experts freely and without charge and order your project by sending the problem details to us using the following address.

[email protected]

By outsourcing your project to the MR-CFD as a CFD simulation freelancer, you will not only receive the related project’s files (Geometry, Mesh, …), but also you will be provided with an extensive tutorial video demonstrating how you can create the geometry, mesh, and define the needed settings(pre-processing, processing and post-processing) in the ANSYS Fluent software all by yourself. Additionally, post-technical support is available to clarify issues and ambiguities.