TY - JOUR

T1 - PALM

T2 - A large-eddy simulation model performing on massively parallel computers

AU - Raasch, Siegfried

AU - Schröter, Michael

N1 - Funding Information: The authors would like to thank Klaus KETELSEN (SGI/Cray, Germany) and Wolfgang BAUMANN (Konrad-Zuse-Zentrum f ̈ur Informationstechnik (ZIB) in Berlin, Germany) for their technical support, as well as Ulrich SCHUMANN for his constructive com- ments on an earlier version of the manuscript. All runs mentioned above were performed on the SGI/Cray- T3E of the John von Neumann Institute for Comput- ing (NIC) in J ̈ulich, Germany. Most of the test runs during the period of development of PALM were per- formed on the SGI/Cray-T3Es of the ZIB and the Re- gionales Rechenzentrum f ̈ur Niedersachsen (RRZN) in Hanover, Germany. Parts of this research were supported by the Deutsche Forschungsgemeinschaft under Grant Ra 617/3-1.

PY - 2001/10

Y1 - 2001/10

N2 - An existing code of a large-eddy simulation (LES) model for the study of turbulent processes in the atmospheric and oceanic boundary layer has been completely recoded for use on massively parallel systems with distributed memory. Parallelization is achieved by two-dimensional domain decomposition and communication is realized by the message passing interface (MPI). Periodic boundary conditions, which are used in both horizontal directions, helped to minimize the parallelization effort. The performance of the new Parallelized LES Model (PALM) is excellent on SGI/Cray-T3E systems and an almost linear speed-up is achieved up to very large numbers of processors. Parallelization strategy and model performance is discussed and validation experiments as well as future applications are presented.

AB - An existing code of a large-eddy simulation (LES) model for the study of turbulent processes in the atmospheric and oceanic boundary layer has been completely recoded for use on massively parallel systems with distributed memory. Parallelization is achieved by two-dimensional domain decomposition and communication is realized by the message passing interface (MPI). Periodic boundary conditions, which are used in both horizontal directions, helped to minimize the parallelization effort. The performance of the new Parallelized LES Model (PALM) is excellent on SGI/Cray-T3E systems and an almost linear speed-up is achieved up to very large numbers of processors. Parallelization strategy and model performance is discussed and validation experiments as well as future applications are presented.

UR - http://www.scopus.com/inward/record.url?scp=0034773749&partnerID=8YFLogxK

U2 - 10.1127/0941-2948/2001/0010-0363

DO - 10.1127/0941-2948/2001/0010-0363

M3 - Article

AN - SCOPUS:0034773749

VL - 10

SP - 363

EP - 372

JO - Meteorologische Zeitschrift

JF - Meteorologische Zeitschrift

SN - 0941-2948

IS - 5

ER -