The implementation of variation approach to calculation of 2D grids in nonstationary problems

Universal variation functionals are supposed to be used for calculation of moving 2D grids in nonstationary problems. For their basic part the coefficients are defined by grid metric parameters calculated on the previous time step. They are corrected by others variation functionals with weighted coefficients proportionally to time step along the time coordinate. The possibilities to construct such functionals are considered in detail. The implementation of corresponding algorithms are discussed.