Hi I am supposed to do an elliptic grid generation as a project. I have to get the input as the coordinates of the boundaries, then generate an elliptic grid based on laplace equation on xi and eta.

My question is .. suppose i need a c grid around an aerofoil, and if the aerofoil is defined by 80 points on its boundary, can i only create a grid with 80 nodal points on the aerofoil surface? Is it good to do some curve fitting, so that i come up with some expression for the aerofoil profle from the 80 points? Or is it good to interpolate?

Please guide me..

thank you Prapanj

It is good to use an interpolation of the given airfoil points, because the grid nodes are to be assigned in such a way that they would cluster at airfoil's nose and other anticipated places of strong gradients (e.g. shock wave foot or a point of boundary layer separation).