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EXN/Aero: OpenFOAM To CGNS Converter & Rotating Frame

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As part of the ongoing development and improvement of the high-performance, cloud-hosted CFD tool, EXN/Aero, an OpenFOAM to CGNS converter and rotating frame model have been implemented.

OpenFOAM to CGNS Converter

Envenio has developed and implemented an OpenFOAM to CGNS converter on its cloud-hosted, on-demand CFD software tool, EXN/Aero. The converter allows users to convert OpenFOAM polymesh files to an equivalent CGNS mesh file.

As one of the most dominant open-source CFD solutions, OpenFOAM has wide appeal for a number of reasons, including the lack of licence costs. This makes it a particularly popular choice for small-shop and freelance CFD users. However, one still requires hardware for OpenFOAM to run and it also lacks a native GUI (although some can be purchased from independent providers). Due to EXN/Aero's speedup and on-demand resource model, users can actually enjoy a more cost-effective solution in some scenarios as explored in this article. (Scott W research study).

Rotating Frame

The recently launched rotating frame model (which continues to be refined) allows a user to solve part of a simulation in a frame of reference that is rotating with respect to the stationary inertial frame. 

"An example would be an impeller pump or a fan.  In this case the fan blades are moving relative to the inertial frame (surroundings) but stationary with respect to the rest of the fan (like how you are stationary on the earth relative to your house, but you and your house are spinning around the earth, around the sun, etc.)" says Kevin Wilcox, Head of Product Development.

"If we kept everything in the inertial frame, which is possible, the fan blades need to be repositioned every timestep, essentially becoming a moving mesh problem, which is very expensive.  Using rotating frame simplifies this process where the effect of the rotation is handled via frame transformation and source terms instead.  Our current implementation is an averaged effect moving from a stationary to rotating frame, but later it will be implemented where the rotating frame undergoes clocked motion" Kevin adds.

EXN/Aero: For The Future

EXN/Aero is a general purpose CFD cloud solver committed to embracing the needs of the engineering community. The EXN/Aero platform includes a meshing tool, the solver, and a post-processing tool, and plenty of storage for your files. There are a range of on-demand options available to users, helping them to better manage project cash flow. This affordable CFD software is sure to be an asset to companies or CFD freelancers like. We offer free trials of the product, starting with a walkthrough with one of our engineers. 

Try EXN/Aero


2017-11-3 | Categories: CFD

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