Computer Programs
NEA-1534 MESYST.
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NEA-1534 MESYST.

MESYST, Simulation of 3-D Tracer Dispersion in Atmosphere

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1. NAME OR DESIGNATION OF PROGRAM:  MESYST.
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2. COMPUTERS
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Program name Package id Status Status date
MESYST NEA-1534/02 Arrived 01-FEB-2000

Machines used:

Package ID Orig. computer Test computer
NEA-1534/02 CRAY family
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3. DESCRIPTION OF PROGRAM OR FUNCTION

Mesyst code is used for the simulation of 3D tracer dispersion in atmosphere.
Three packages are part of this system:
Cre_topo: prepares the terrain data for the Mesyst.
Noabl: code calculates three- dimensional free divergence windfields over complex terrain.  
Pas: Computing of tracer concentrations and depositions on a given domain.
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4. METHOD OF SOLUTION

NOABL - Line Over Relaxation + Special adaptation of GAUSS procedure.
PAS - Monte Carlo Method.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Computations: Mesh size: variable from some meters to some hundreds meters Mesh number: variable depending on availables real data (some hundreds points on each directions).
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6. TYPICAL RUNNING TIME

The running times are variable. The efficiencies are good for NOABL for few processors (up to 90%) and decreasing with the number of processors. For PAS, the efficiencies are excellents due to Monte Carlo method. Running times are variable depending on the accuracy required.
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7. UNUSUAL FEATURES OF THE PROGRAM

This model can take into account the spatial and temporal variation of wind, variable topography.
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8. RELATED AND AUXILIARY PROGRAMS:  Package for the simulation of the abnormal distribution.
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9. STATUS
Package ID Status date Status
NEA-1534/02 01-FEB-2000 Masterfiled Arrived
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10. REFERENCES

- Frank STEFFANY:
  Anwendungen eines massenkonsisten Strvmungsmodelles im
  ''Microscale'', Diplomarbeit, Institut fuer Geophysik und
  Meteorologie der Universitdt zu Kvln, Mai 1991.
- Georges AFKEN:
  Mathematical Methods for Physics, Academic Press Inc. 1985.
- C.A. Sherman, A Mass Consistent Model for Wind Field over
  Complex Terrain,
  Journal of Applied Meteorology 17, p.312-319., 1978.
  NEA-1534/01:
- S. Nakamura, Computational Methods in Engineering and Science,
  Robert E. Krieger Publishing Company, 1986
NEA-1534/02, included references:
- R.M. Traci et al.:
  Developing a Site Selection Methodology for Wind Energy Conversion
  Systems, (Final Report for the Period 15 June 77 to 15 Sept. 78)
  DOE/ET/20280-3, UC-60 (September 1978)
- V. Mastrangelo and I. Mehilli:
  Parallelization and Implementation of NOABL program on CRAY T3D,
  CRAY T3E and MEIKO-CS2 Parallel Machines
  (June 16, 1997)
- V. Mastrangelo, I. Mehilli, F. Schmidt, M. Weigele, J. Kaltenbach,
A. Grohmann and R. Kopetzky:
Parallel and Distributed Development and Simulation of Atmospheric Models
June 1998
- I. Mehilli:
Modelisation, Simulation de la Dispersion Atmospherique des Traceurs et Calcul
de Haute Performance. Validation sur des Experiences Internationales
PhD Thesis, Conservatoire National des Arts et Metiers, 2 Avril 1999
- Fiche Explicative de l'Utilisation du programme MESYST
User's Guide (to be translated)
- V. Mastrangelo and I. Mehilli:
Projet de Parallelisation du programme NOABL
Rapport relatif au contrat CNAM-OCDE (1996)
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11. MACHINE REQUIREMENTS

MESYST program can run CRAY T3E parallel machine. Main storage (minimal) requirements: ~ 3.0 Mbytes.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-1534/02 FORTRAN-77
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

NOABL: SOLARIS 2.3  +  MEIKO 1.4.08
Cre_topo, NOABL, PAS: UNICOS/mk 2.0
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS: Libraries requirements: PVM, MPI.
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15. NAME AND ESTABLISHMENT OF AUTHORS

     V. Mastrangelo, I. Mehilli
     Conservatoire National des Arts et Metiers
     292, Rue Saint Martin
     75141 Paris Cedex 03
     FRANCE

     Origin of the program (Serial Version): NOOA-USA, completed by
     IKE-GERMANY and JAERI-JAPAN
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16. MATERIAL AVAILABLE
NEA-1534/02
EXE\ Executables directory
IKE\ IKE directory
INPUT\ Input files
LIB\ Library directory
NOABL-VPP300\ Directory of NOABL module
SIESTA\ Material of SIESTA
SRC\ Source codes
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17. CATEGORIES
  • G. Radiological Safety, Hazard and Accident Analysis
  • H. Heat Transfer and Fluid Flow
  • R. Environmental and Earth Sciences

Keywords: Monte Carlo method, atmosphere, hydrodynamics.