Erik Schnetter <>

January 09 2012


1 Introduction

PeriodicCarpet applies periodic boundary conditions to Carpet grids. In particular, it provides correct behaviour for the case where a reļ¬nement level overlaps the periodic boundaries, and may therefore be made up of more than one component on the same process. Thorn Periodic, by constrast, will not handle this case properly.

2 Using This Thorn