کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
521407 867766 2010 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Cell-level canonical sampling by velocity scaling for multiparticle collision dynamics simulations
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
Cell-level canonical sampling by velocity scaling for multiparticle collision dynamics simulations
چکیده انگلیسی

A local Maxwellian thermostat for the multiparticle collision dynamics algorithm is proposed. The algorithm is based on a scaling of the relative velocities of the fluid particles within a collision cell. The scaling factor is determined from the distribution of the kinetic energy within such a cell. Thereby the algorithm ensures that the distribution of the relative velocities is given by the Maxwell–Boltzmann distribution. The algorithm is particularly useful for non-equilibrium systems, where temperature has to be controlled locally. We perform various non-equilibrium simulations for fluids in shear and pressure-driven flow, which confirm the validity of the proposed simulation scheme. In addition, we determine the dynamic structure factors for fluids with and without thermostat, which exhibit significant differences due to suppression of the diffusive part of the energy transport of the isothermal system.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Computational Physics - Volume 229, Issue 1, 1 January 2010, Pages 168–177
نویسندگان
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