We discuss the algorithm for calculating nonstationary stratified flows, using the Euler–
Lagrange coordinates. We numerically model the evolution of local density perturbation in a shear
flow of a linearly stratified fluid. The computational results demonstrate the considerable distortion of
a wave pattern by a shear flow.
The journal provides English translations of selected new original Russian papers on the theoretical aspects of numerical analysis and the application of mathematical methods to simulation and modelling. The editorial board, consisting of the most prominent Russian scientists in numerical analysis and mathematical modelling, select papers on the basis of their high scientific standard, innovative approach and topical interest.