Electron. J. Diff. Equ., Vol. 2015 (2015), No. 104, pp. 1-19.

Three models for rectilinear particle motion with the Basset history force

Shujing Xu, Ali Nadim

Abstract:
We consider three model problems that describe rectilinear particle motion in a viscous fluid under the influence of the Basset history force. These problems consist of sedimentation starting from rest, impulsive motion in a quiescent fluid, and oscillatory sliding motion. The equations of motion are integro-differential equations with a weakly singular kernel. We derive analytical solutions to all three problems using Laplace transforms and discuss the mathematical relation between the sedimentation and impulsive start problems. We also compare several numerical schemes for solving the integro-differential equations and benchmark them against the analytical results.

Submitted November 7, 2014. Published April 21, 2015.
Math Subject Classifications: 76T20, 45J05, 65L05.
Key Words: Particle motion; history force; integro-differential equations; Laplace transforms; numerical methods; multiphase flow.

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  Shujing Xu
Institute of Mathematical Sciences
Claremont Graduate University
Claremont, CA 91711, USA
email: flora.xushujing@gmail.com
Ali Nadim
Institute of Mathematical Sciences
Claremont Graduate University
Claremont, CA 91711, USA
email: ali.nadim@cgu.edu

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