Результаты поиска по 'Particle Mesh method':
Найдено статей: 3
  1. Borodachev L.V., Kolomiets D.O.
    Parallel calculations in the Darwin PIC-model
    Computer Research and Modeling, 2015, v. 7, no. 1, pp. 61-69

    The approach to parallel implementation of low-frequency PIC-algorithms is proposed, taking into account peculiarity of the nonradiative (Darwin) field approximation. Its advantages and specifics of adaptation to the base computer types for high performance calculations are discussed.

    Keywords: Particle Mesh method, Vlasov–Darwin model, PIC-algorithm, parallel calculations.
    Views (last year): 2.
  2. Polyakov S.V., Podryga V.O.
    A study of nonlinear processes at the interface between gas flow and the metal wall of a microchannel
    Computer Research and Modeling, 2022, v. 14, no. 4, pp. 781-794

    The work is devoted to the study of the influence of nonlinear processes in the boundary layer on the general nature of gas flows in microchannels of technical systems. Such a study is actually concerned with nanotechnology problems. One of the important problems in this area is the analysis of gas flows in microchannels in the case of transient and supersonic flows. The results of this analysis are important for the gas-dynamic spraying techique and for the synthesis of new nanomaterials. Due to the complexity of the implementation of full-scale experiments on micro- and nanoscale, they are most often replaced by computer simulations. The efficiency of computer simulations is achieved by both the use of new multiscale models and the combination of mesh and particle methods. In this work, we use the molecular dynamics method. It is applied to study the establishment of a gas microflow in a metal channel. Nitrogen was chosen as the gaseous medium. The metal walls of the microchannels consisted of nickel atoms. In numerical experiments, the accommodation coefficients were calculated at the boundary between the gas flow and the metal wall. The study of the microsystem in the boundary layer made it possible to form a multicomponent macroscopic model of the boundary conditions. This model was integrated into the macroscopic description of the flow based on a system of quasi-gas-dynamic equations. On the basis of such a transformed gas-dynamic model, calculations of microflow in real microsystem were carried out. The results were compared with the classical calculation of the flow, which does not take into account nonlinear processes in the boundary layer. The comparison showed the need to use the developed model of boundary conditions and its integration with the classical gas-dynamic approach.

    Keywords: gas-dynamic microflows in channels with real wall structure, multiscale mathematical modeling, boundary conditions problem, combination of microscopic and macroscopic approaches, parallel computing.
  3. Pogorelova E.A., Lobanov A.I.
    High Performance Computing for Blood Modeling
    Computer Research and Modeling, 2012, v. 4, no. 4, pp. 917-941

    Methods for modeling blood flow and its rheological properties are reviewed. Blood is considered as a particle suspencion. The methods are boundary integral equation method (BIEM), lattice Boltzmann (LBM), finite elements on dynamic mesh, dissipative particle dynamics (DPD) and agent based modeling. The analysis of these methods’ applications on high-performance systems with various architectures is presented.

    Keywords: blood, hemodynamics, nonnewtonian fluid, red blood cells, high performance computing.
    Views (last year): 2. Citations: 3 (RSCI).

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