A Quasi-Variational Inequality Problem Arising in the Modeling of Growing Sandpiles

Details A Quasi-Variational Inequality Problem Arising in the Modeling of Growing Sandpiles A Quasi-Variational Inequality Problem Arising in the Modeling of Growing Sandpiles

2012-03-07

arxiv.org/abs/1203.1611v1

Mathematics

Analysis of PDEs

51 p., low resolution figs

Scientific paper

Existence of a solution to the quasi-variational inequality problem arising in a model for sand surface evolution has been an open problem for a long time. Another long-standing open problem concerns determining the dual variable, the flux of sand pouring down the evolving sand surface, which is also of practical interest in a variety of applications of this model. Previously, these problems were solved for the special case in which the inequality is simply variational. Here, we introduce a regularized mixed formulation involving both the primal (sand surface) and dual (sand flux) variables. We derive, analyse and compare two methods for the approximation, and numerical solution, of this mixed problem. We prove subsequence convergence of both approximations, as the mesh discretization parameters tend to zero; and hence prove existence of a solution to this mixed model and the associated regularized quasi-variational inequality problem. One of these numerical approximations, in which the flux is approximated by the divergence-conforming lowest order Raviart-Thomas element, leads to an efficient algorithm to compute not only the evolving pile surface, but also the flux of pouring sand. Results of our numerical experiments confirm the validity of the regularization employed.

Affiliated with

Also associated with

No associations

Rating

A Quasi-Variational Inequality Problem Arising in the Modeling of Growing Sandpiles does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A Quasi-Variational Inequality Problem Arising in the Modeling of Growing Sandpiles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Quasi-Variational Inequality Problem Arising in the Modeling of Growing Sandpiles will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-395607