Peter Bastian - Böcker

This book presents the state-of-the-art in supercomputer simulation. It includes the latest findings from leading researchers using one of Europe’s top systems at the High Performance Computing Center Stuttgart (HLRS) in 2023. A wide variety of topics are discussed from all fields of computational science and engineering, ranging from CFD to computational physics and from chemistry to computer science, with a special emphasis on industrially relevant applications that deliver a high level of sustained performance.Covering the main methods in high-performance computing, and featuring a wealth of color illustrations and tables of results, the book will be of particular interest to scientists and engineers who seek to achieve the best performance for production codes.

Subsurface flow problems are inherently multiscale in space due to the large variability of material properties and in time due to the coupling of many different physical processes, such as advection, diffusion, reaction and phase exchange. Subsurface flow models still need considerable development. For example, nonequilibrium effects, entrapped air, anomalous dispersion and hysteresis effects can still not be adequately described. Moreover, parameters of the models are diffcult to access and often uncertain. Computational issues in subsurface flows include the treatment of strong heterogeneities and anisotropies in the models, the effcient solution of transport-reaction problems with many species, treatment of multiphase-multicomponent flows and the coupling of subsurface flow models to surface flow models given by shallow water or Stokes equations. With respect to energy and the environment, in particular the modelling and simulation of radioactive waste management and sequestration of CO2 underground have gained high interest in the community in recent years. Both applications provide unique challenges ranging from modelling of clay materials to treating very large scale models with high-performance computing. This book brings together key numerical mathematicians whose interest is in the analysis and computation of multiscale subsurface flow and practitioners from engineering and industry whose interest is in the applications of these core problems.