Accuracy, Convergence and Mesh Quality

Another Fine Mesh

[This article was first published in the May/June 2012 issue of The Connector. It was so popular there it’s reposted here to reach a broader audience.]

“We know embarrassingly little about how the mesh affects the CFD solution,” said Prof. Carl Ollivier-Gooch of the University of British Columbia.

That statement is counter to what we all know to be true in practice, that a good mesh helps the computational fluid dynamics (CFD) solver converge to the correct answer while minimizing the computer resources expended. Stated differently, most every decent solver will yield an accurate answer with a good mesh, but it takes the most robust of solvers to get an answer on a bad mesh.

The crux of the issue is what precisely is meant by “a good mesh.” Syracuse University’s Prof. John Dannenhoffer points out that we are much better at identifying a bad mesh than we…

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About kcavatar

A 19-year old student of Aerospace Engineering at PEC, Chandigarh, (previously Mechanical Engineering at National Institute of Technology, Srinagar). I have a great fascination for learning, getting enlightened about the ever-changing scenario of the world. Crave to do the fullest to bring tremendous changes to bring the virtuous world back.
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