University of Twente Student Theses


Grid importing for CFD simulations of turbomachines

Lamboo, S. (2015) Grid importing for CFD simulations of turbomachines.

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Abstract:The turbomachinery department of the University of Queensland Mechanical and Mining Engineering group has CGNS format files that are not compatible with the in house gas dynamics simulation code Eilmer3. For this a conversion software has been designed to read the CGNS files and write the grid to an ASCII format VTK file. The conversion software also writes a text file with the boundary condtions stored in the CGNS file. The software has been proven to succesfully convert the CGNS files into Eilmer3 friendly format files. Next the converted files were read using Python andmade ready for simulations with Eilmer3. During preprocessing it became evident that the CGNS file used as a reference throughout the assignment as corrupted. The grid was constructed, but because it was corrupted no flow simulations were possible. Despite the fact that no full simulations could be run with the example CGNS file a number of things were learned throughout the project. The most important being that working with CGNS files can be time intensive and frustrating. It is therefore recommended that either time is dedicated to CGNS and to work consistently when writing CGNS files or to explore possible alternatives like GridPro, Pointwise, or OpenFOAM to work with grids in the future.
Item Type:Internship Report (Master)
University of Queensland, Australia
Faculty:ET: Engineering Technology
Subject:52 mechanical engineering
Programme:Sustainable Energy Technology MSc (60443)
Keywords:Turbomachinery, CFD, CGNS
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