|Authors||O. Al-Khayat and H. P. Langtangen|
|Title||Computational Aspects of Multiscale Simulation With the Lumped Particle Framework|
|Afilliation||, , Scientific Computing|
|Project(s)||Center for Biomedical Computing (SFF)|
|Publication Type||Journal Article|
|Year of Publication||2012|
|Journal||Communications in Computational Physics|
First introduced in , the lumped particle framework is a flexible and numerically efficient framework for the modelling of particle transport in fluid flow. In this paper, the frame- work is expanded to simulate multicomponent particle-laden fluid flow. This is accomplished by introducing simulation protocols to model particles over a wide range of length and time scales. Consequently, we present a time ordering scheme and an approximate approach for ac- celerating the computation of evolution of different particle constituents with large differences in physical scales. We apply the extended framework on the temporal evolution of three parti- cle constituents in sand-laden flow, and horizontal release of spherical particles. Furthermore, we evaluate the numerical error of the lumped particle model. In this context, we discuss the Velocity-Verlet numerical scheme, and show how to apply this to solving Newton's equations within the framework. We show that the increased accuracy of the Velocity-Verlet scheme is not lost when applied to the lumped particle framework.