Boundary Integral Analysis for the Non-homogeneous 3D Stokes Equation
Abstract
A regular-grid volume-integration algorithm is developed for the non-homogeneous 3D Stokes equation. Based upon the observation that the Stokeslet is the Laplacian of a function , the volume integral is reformulated as a simple boundary integral, plus a remainder domain integral. The modified source term in this remainder integral is everywhere zero on the boundary and can therefore be continuously extended as zero to a regular grid covering the domain. The volume integral can then be evaluated on the grid. Applying this method to the Navier-Stokes equations will require obtaining velocity gradients, and thus an efficient algorithm for post-processing these derivatives is also discussed. To validate the numerical implementation, test results employing a linear element Galerkin approximation are presented.
Cite
@article{arxiv.1812.00853,
title = {Boundary Integral Analysis for the Non-homogeneous 3D Stokes Equation},
author = {L. J. Gray and Jas Jakowski and M. N. J. Moore and Wenjing Ye},
journal= {arXiv preprint arXiv:1812.00853},
year = {2018}
}