Portable Parallelization of Industrial Aerodynamic Applications (POPINDA)

This volume contains the summarizing of the most important developments and results obtained in the project "Portable Parallelization of Industrial Aerodynamic Applications (POPINDA)" which was supported by the German Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie (Federal Ministry of Education, Science, Research and Technology, BMBF) and carried out between summer 1993 and 1997. In this project four block-structured industrial aerodynamic application codes have been unified, standardized and parallelized in a portable way by the development of a high-level communications library. Large scale benchmarks demonstrate the obtained benefits. In addition to these topics this volume describes algorithmic adaptations to the needs of parallel computing and new algorithmic developments in order to accelerate the multigrid algorithms employed. A special focus is laid upon the development of appropriate methods for the support of adaptive grid structures on parallel computers.

Inhalt
1 Overview.- 1.1 Basis, Goals and Results of POPINDA.- 1.2 POPINDA the Industrial Qualification.- 2 Parallelization and Benchmarking.- 2.1 Unified Block Structures the Basis for Parallelization.- 2.2 The High-Level Communications Library CLIC.- 2.3 Porting CLIC from PARMACS to MPI.- 2.4 FLOWer.- 2.5 NSFLEX-P.- 2.6 Benchmarks and Large Scale Examples.- 3 Algorithmic Aspects.- 3.1 Singularities of Block-Structured Meshes a Special Parallelizable Approach.- 3.2 Dual-Time Stepping Method.- 3.3 Scalability of Parallel Multigrid.- 3.4 Convergence for Increasing Numbers of Blocks.- 3.5 New Smoothers for Higher Order Upwind Discretizations of Convection-Dominated Problems like the Euler Equations.- 3.6 Krylov Subspace Acceleration for Linear and Nonlinear Multigrid Schemes.- 3.7 Multiple Semi-Coarsening for 3D Singularly Perturbed Scalar Partial Differential Equations.- 4 Adaptive Local Refinements.- 4.1 Why to Use Adaptive Grids?.- 4.2 Self-Adaptive Local Refinements Supported by the CLIC-3D Library.- 4.3 Load-Balancing Strategies.- 4.4 Experiences LiSS.- 4.5 Experiences FLOWer.- 5 Special Aspects and Related Activities.- 5.1 Software Engineering and Software Quality Issues.- 5.2 Real Applications on Parallel Systems the RAPS Initiative.- 5.3 MEGAFLOW.