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Which grid is used to find the flow field properties using finite difference solutions?(a) Rectangular grid(b) Non – rectangular grid(c) Square grid(d) Circular gridI got this question in an interview.My query is from Philosophy of Method of Characteristics in division Numerical Techniques for Steady Supersonic Flow of Aerodynamics

Answer»

Right answer is (a) RECTANGULAR grid

The best I can explain: For computing the flow FIELD properties at points in the flow, there is OFTEN grid considered in a plane with known properties at one of the grid point. USING that, properties at other grid points can be computed. In the method of characteristics, non – rectangular grid point is considered and for finite – difference solution, rectangular grid is considered.



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