Parallelization of the Lagrangian Particle Dispersion Model

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Description

An advanced stochastic Lagrangian Particle Dispersion Model (LPDM) is used by the Atmospheric Technologies Group (ATG) to simulate contaminant transport. The model uses time-dependent three-dimensional fields of wind and turbulence to determine the location of individual particles released into the atmosphere. This report describes modifications to LPDM using the Message Passing Interface (MPI) which allows for execution in a parallel configuration on the Cray Supercomputer facility at the SRS. Use of a parallel version allows for many more particles to be released in a given simulation, with little or no increase in computational time. This significantly lowers (greater than an ... continued below

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16 p.

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Buckley, R.L. & O`Steen, B.L. August 1, 1997.

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Description

An advanced stochastic Lagrangian Particle Dispersion Model (LPDM) is used by the Atmospheric Technologies Group (ATG) to simulate contaminant transport. The model uses time-dependent three-dimensional fields of wind and turbulence to determine the location of individual particles released into the atmosphere. This report describes modifications to LPDM using the Message Passing Interface (MPI) which allows for execution in a parallel configuration on the Cray Supercomputer facility at the SRS. Use of a parallel version allows for many more particles to be released in a given simulation, with little or no increase in computational time. This significantly lowers (greater than an order of magnitude) the minimum resolvable concentration levels without ad hoc averaging schemes and/or without reducing spatial resolution. The general changes made to LPDM are discussed and a series of tests are performed comparing the serial (single processor) and parallel versions of the code.

Physical Description

16 p.

Notes

OSTI as DE97054345

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  • Other Information: PBD: Aug 1997

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  • Other: DE97054345
  • Report No.: WSRC-TR--97-00279
  • Grant Number: AC09-96SR18500
  • DOI: 10.2172/578683 | External Link
  • Office of Scientific & Technical Information Report Number: 578683
  • Archival Resource Key: ark:/67531/metadc691419

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  • August 1, 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • Feb. 9, 2016, 6:19 p.m.

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Buckley, R.L. & O`Steen, B.L. Parallelization of the Lagrangian Particle Dispersion Model, report, August 1, 1997; Aiken, South Carolina. (digital.library.unt.edu/ark:/67531/metadc691419/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.