KIAM Main page Web Library  •  Publication Searh   

KIAM Preprint  38, Moscow, 2015
Authors: Gasilov V. A., Krukovskiy A. Y., Poveschenko Y. A., Tsygvintsev I. P., Boykov D.S.
Implicit two-stage Lagrangian-Euler difference scheme for gasdynamics calculations using concerted approximations to mass and momentum balance equations
We propose a variant of the two-stage Eulerian-Lagrangian difference scheme for gas dynamics calculations in the two-dimensional approximation. Energy balance equation in the original gas-dynamic system of equations is written in the 'entropy' form with respect to the gas medium internal energy. The initial equations of continuity and momentum are divergent-conservative, therefore they are approximated as conservative balance equations. Using the constructed difference approximations to gasdynamics equations we derive a kinetic energy balance equation that does not contain nonphysical source terms which in some other difference constructions can appear due to the method of differencing. Such sources usually are proportional to the time step, and may accumulate during the calculation. The kinetic energy balance can be combined with that of the internal energy thus producing the equation which is a gasdynamic form of the total energy conservation law. In accordance with the physical processes occurring inside the gas flow an internal energy and kinetic energy can pass through the mutual transformations without the influence of 'source terms' caused by approximation effects.
gasdynamics, mixed Euler-Lagrange method, concerted approximation, implicit two- stage totally conservative finite-difference scheme
Publication language: russian,  pages: 22
Research direction:
Mathematical problems and theory of numerical methods
Russian source text:
List of publications citation:
Export link to publication in format:   RIS    BibTeX
View statistics (updated once a day)
over the last 30 days 13 (+9), total hit from 01.09.2019 241
About authors:
  • Gasilov Vladimir Anatolievich, RAS
  • Krukovskiy Alexander Yurevich, RAS
  • Poveschenko Yuri Andreevich, RAS
  • Tsygvintsev Ilia Pavlovich, RAS
  • Boykov Dmitri Sergeevich, RAS