These are chat archives for Fortran-FOSS-Programmers/General-Discussion

Feb 2017
Izaak "Zaak" Beekman
Feb 07 2017 21:27
Well it depends how the grid was generated... I have done some composition of analytic functions (conformal mapping which is investable, and 1-D stretching functions) or finite difference if the grid was elliptic or hyperbolic etc numerically generated. Obviously the difficulty becomes proving > 2nd order accuracy if you then also have a numerically generated grid and are using FD etc. to compute the jacobians or grid metrics... But the case that Stefano describes sounds very complicated... In particular with overset/chimera grids you lose conservation in the interpolated region... There is some work being done to ensure stable, conservative interpolation, but it's a real pain....