# Oral Qualifying Exam Problems!

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 April 1, 2003, 04:55 Re: Oral Qualifying Exam Problems! #21 Prasad Guest   Posts: n/a What is the basic difference between Finite Volume Method (FVM), Finite Difference Method (FDM) and Finite Element Method(FEM)? Why is FVM & FDM preferred for CFD analysis where as FEM for Structural analysis?

 April 2, 2003, 04:55 Re: Oral Qualifying Exam Problems! #22 Peter J. Guest   Posts: n/a A bunch of interesting unanswered questions here... I think that it is time that we all start answering them. It seems like Wen Long has given up and needs some help

 April 3, 2003, 12:45 Re: Oral Qualifying Exam Problems! #24 Praveen Guest   Posts: n/a 1) Peter's question of blunt body flow: The questions refers to space-marching methods. You cannot use them for blunt bodies because of the presence of a subsonic region at the nose. Space marching requires that the equations be hyperbolic. 2) John Bradley's question of Chimney spiraling pattern: The spirals are put in to prevent periodic vortex shedding which can lead to unstable oscillations of the chimney, and final destruction.

 April 4, 2003, 09:13 Re: Oral Qualifying Exam Problems! #25 Peter Attar Guest   Posts: n/a Very good!!! You pass : )

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