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Avtometriya

2016 year, number 6

DECOMPOSITION STRATEGIES IN THE PROBLEMS OF MODELING OF ADDITIVE LASER TECHNOLOGIES

M. D. Khomenko, A. V. Dubrov, F. Kh. Mirzade
Institute of Laser and Information Technologies, Russian Academdy of Sciences, ul. Svyatoozerskaya, 1, Shatura 140700
Keywords: декомпозиция области, численное моделирование, аддитивные технологии, OpenFOAM, domain decomposition, numerical simulation, additive technology

Abstract

The development of additive technologies and their application in industry is associated with the possibility of predicting the final properties of crystallized added material. The paper describes the problem characterized by a dynamic and spatially nonuniform complexity, which, in the case of uniform decomposition of a computational domain, leads to unbalanced loading on computing cores. The strategy of partitioning of the computational domain is used, which minimizes the CPU time losses in the serial computations of the additive technological process. The chosen strategy is optimal from the standpoint of a priori unknown dynamic computational loading distribution. The scaling of the computational problem on the cluster of the Institute of Laser and Information Technologies (RAS) that uses the InfiniBand interconnect is determined. As a result of using the parallel code with optimal decomposition, it was possible to significantly reduce the computational time (down to several hours), which is important in the context of development of the software package for support of engineering activity in the field of additive technology.