I have a doubt regarding interpolation.I'm solving a 2-dproblem where I have to calculate the value of pressure on te boundary using interpolation.The only form of interpolation I'm familiar with is lagrange interpolation.Is there a more efficient way of interpolating the data onto the boundary using a compact stencil of at least second order.

Thanks a lot

This may help, it's a good book for free readable onthe web:

http://library.lanl.gov/numerical/bookfpdf/f3-0.pdf http://library.lanl.gov/numerical/bookfpdf/f3-1.pdf etc..

hi,

Try biquadratic interpolation. You can read it from Ye's and Udaykumar's paper about cartesian grid method to solve problem with complex geometry.