PROGRAM COMPLEX LEGAK FOR COMPUTING TIME-DEPENDENT MULTI-CONSTITUENT CONTINUUM FLOW AND PRINCIPLES OF THE COMPLEX IMPLEMENTATION ON MULTIPROCESSOR DISTRIBUTED MEMORY COMPUTERS
P.A. Avdeev, M.V. Artamonov, S.M. Bakhrakh, S.V. Velichko, N.A. Volodina, N.M. Vorob'eva, S.P. Egorshin, E.N. Esaeva, A.D. Kovaleva, M.V. Luchinin, S.N. Pronevich, V.F. Spiridonov, I.Yu. Taraday, A.N. Tarasova, E.V. Shuvalova
VANT. Ser.: Mat. Mod. Fiz. Proc 2001. Вып.3. С. 14-18.
The paper describes fundamentals of the method implemented in the program complex LEGAK intended for time-dependent multi-constituent continuum flow computations.
The principles of LEGAK program complex parallelization using multiprocessor distributed-memory computers are discussed.
LEGAK implementation on multiprocessor computer systems allowed computations with a significantly larger number of computational points than using non-scalar computers which is of especial importance when numerically simulating contact boundary instabilities.
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THE IMPLEMENTATION OF A DIFFERENCE SCHEME FOR CALCULATING ELASTICITY-PLASTICITY WITH ESTIMATION OF ACCELERATION ON THE SIDES OF COMPUTATIONAL CELLS IN LEGAK COMPLEX AND ITS USE TO COMPUTE MATERIALS DESTRUCTION
S.M. Bakhrakh, S.V. Mikhaylov, A.O. Naumov, V.F. Spiridonov, E.V. Shuvalova
VANT. Ser.: Mat. Mod. Fiz. Proc 2001. Вып.3. С. 72-79.
The paper deals with the matters centred around constructing difference scheme to solve an equation of motion at calculating time-dependant elastic-plastic flows. The difference scheme, which determines accelerations on the computational cell sides and interpolates them on the cell nodes is introduced into LEGAK complex.
A new and an old difference schemes are compared on test computations.
The advantages of the new scheme have shown themselves in computing material destruction according to a binary test accounting for both tensions and shearing strains.
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English
