A numerical viscometer via distributed computing and the completed double layer boundary element method

摘要

Using the completed double layer boundary element method, the parallel virtual machine message passing system, and an asynchronous iterative technique we calculate the viscosity of concentrated systems of large numbers of spherical particles confined by a rigid spherical container. As many as 200 particles are used in a configuration, and results are calculated for volume fractions as high as 40/100. We define the viscosity of the system to be the ratio of the velocity of a test sphere Driven by an external force or a torque, when alone in the container, to its velocity When it is the only sphere of a suspension acted upon by the same external force Or torque.