%0 Journal Article
%@holdercode {isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S}
%@nexthigherunit 8JMKD3MGPCW/3ESGTTP
%@archivingpolicy denypublisher denyfinaldraft12
%@resumeid
%@resumeid
%@resumeid 8JMKD3MGP5W/3C9JHC3
%@usergroup administrator
%@usergroup sergio
%3 parallel implementation.pdf
%@dissemination WEBSCI
%@secondarykey INPE-13114-PRE/8374
%@issn 0885-7458
%A Roberti, Debora R.,
%A Souto, Roberto P.,
%A Campos Velho, Haroldo Fraga de,
%A Degrazia, Gervasio A.,
%A Anfossi, Domenico,
%T Parallel implementation of a Lagrangian stochastic model for pollutant dispersion
%B International Journal of Parallel Programming
%D 2005
%V 33
%N 5
%P 485-498
%8 Oct.
%2 sid.inpe.br/iris@1916/2005/10.26.16.44.11
%4 sid.inpe.br/iris@1916/2005/10.26.16.44
%K high performance application, MPI, pollutant dispersion.
%X Lagrangian dispersion models have shown to be effective and reliable tools for simulating the airborne pollutant dispersion. However, the main drawback for their use as regulatory models is the associated high computational costs. Consequently, in this paper a parallel version of a Lagrangian particle model-LAMBDA-is developed using the MPI message passing communication library. Performance tests were executed in a distributed memory parallel machine, a multicomputer based on IA-32 architecture. Portions of the pollutant in the air emitted from its source are simulated as fictitious particles whose trajectories evolve under stochastic forcing. This yields independent evolution equations for each particle of the model that can be computed by a different processor in a parallel implementation. Speed-up results show that the parallel implementation is suitable for the used architecture. .
%@language English
%@copyholder SID/SCD
%@secondarytype PRE PI
%@area COMP
%@group LAC-INPE-MCT-BR
%@affiliation Instituto Nacional de Pesquisas Espaciais, Laboratório Associado de Computação e Matemática  Aplicada, (INPE, LAC),
%@affiliation Univ Fed Santa Maria, Dept Phys, Santa Maria, RS BR-97119900 Brazil,
%@affiliation CNR, Italian Natl Res Council, Inst Atmospher Sci & Climate, Turin, I-10126 Italy,