Which type of grids is the best for flow over an airfoil?(a) Stretched grids(b) Adaptive grids(c) Boundary-fitted grids(d) Elliptic gridsThis question was posed to me by my college director while I was bunking the class.I want to ask this question from Discretization Aspects topic in division Basic Aspects of Discretization, Grid Generation with Appropriate Transformation of Computational Fluid Dynamics

Which type of grids is the best for flow over an airfoil?(a) Stretched

1.	Which type of grids is the best for flow over an airfoil?(a) Stretched grids(b) Adaptive grids(c) Boundary-fitted grids(d) Elliptic gridsThis question was posed to me by my college director while I was bunking the class.I want to ask this question from Discretization Aspects topic in division Basic Aspects of Discretization, Grid Generation with Appropriate Transformation of Computational Fluid Dynamics
Answer» Correct choice is (c) Boundary-fitted grids The best I can EXPLAIN: The shape of the AIRFOIL is complex. So, generating a grid that FITS the boundary of this airfoil is best. STRETCHED grids are for flat surfaces. Adaptive grids are needed if the flow gradients are not known to the user. Elliptic grids are USEFUL when the transformation is elliptic.

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