کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
522233 867817 2011 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A pressure boundary integral method for direct fluid–particle simulations on Cartesian grids
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
A pressure boundary integral method for direct fluid–particle simulations on Cartesian grids
چکیده انگلیسی

We consider a new Cartesian grid method for direct numerical simulations of fully coupled interaction of incompressible flow and spherical particles, based on a discontinuous extension of the pressure Poisson equation (PPE) across particle boundaries. We give a complete mathematical description of the boundary-integral treatment of the discontinuous PPE that includes the derivation of a new pressure boundary condition for accelerating boundaries and the solution of the system of boundary integral equations using spherical harmonics expansions. The model was validated with the standard test for finite Reynolds number flow around a sphere and with a novel test using the analytical solution for the Stokes flow past two adjacent spheres moving with the same velocity. The model capability and numerical efficiency was demonstrated with simulations for the collective settling of groups of 64–512 particles.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Computational Physics - Volume 230, Issue 5, 1 March 2011, Pages 1749–1765
نویسندگان
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