Publisher DOI: 10.1007/s00791-015-0246-y
Title: Numerical simulation of skin transport using Parareal
Authors: Kreienbuehl, Andreas 
Naegel, Arne 
Ruprecht, Daniel  
Speck, Robert 
Wittum, Gabriel 
Krause, Rolf 
Keywords: Load balancing;Parareal;Skin transport;Space–time parallelism;Weak scaling
Issue Date: 15-Aug-2015
Source: Computing and Visualization in Science 17 (2): 99-108 (2015-08-15)
Journal: Computing and Visualization in Science 
Abstract (english): 
In silico investigation of skin permeation is an important but also computationally demanding problem. To resolve all scales involved in full detail will not only require exascale computing capacities but also suitable parallel algorithms. This article investigates the applicability of the time-parallel Parareal algorithm to a brick and mortar setup, a precursory problem to skin permeation. The C++ library Lib4PrM implementing Parareal is combined with the UG4 simulation framework, which provides the spatial discretization and parallelization. The combination’s performance is studied with respect to convergence and speedup. It is confirmed that anisotropies in the domain and jumps in diffusion coefficients only have a minor impact on Parareal’s convergence. The influence of load imbalances in time due to differences in number of iterations required by the spatial solver as well as spatio-temporal weak scaling is discussed.
ISSN: 14329360
Document Type: Article
Peer Reviewed: Yes
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