Accession Number : ADA295612

Title :   Parallel Simulation of Subsonic Fluid Dynamics on a Cluster of Workstations.

Descriptive Note : Memorandum rept.,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE ARTIFICIAL INTELLIGENCE LAB

Personal Author(s) : Skordos, Panayotis A.

PDF Url : ADA295612

Report Date : NOV 1994

Pagination or Media Count : 19

Abstract : An effective approach of simulating fluid dynamics on a cluster of non-dedicated workstations is presented. The approach uses local interaction algorithms, small communication capacity, and automatic migration of parallel processes from busy hosts to free hosts. The approach is well-suited for simulating subsonic flow problems which involve both hydrodynamics and acoustic waves; for example, the flow of air inside wind musical instruments. Typical simulations achieve $80/%$ parallel efficiency (speedup/processors) using 20 HP-Apollo workstations. Detailed measurements of the parallel efficiency of 2D and 3D simulations are presented, and a theoretical model of efficiency is developed which fits closely the measurements. Two numerical methods of fluid dynamics are tested: explicit finite differences, and the lattice Boltzmann method.

Descriptors :   *COMPUTERIZED SIMULATION, *PARALLEL PROCESSING, *SUBSONIC FLOW, *FLUID DYNAMICS, ALGORITHMS, DISTRIBUTED DATA PROCESSING, MODELS, CAPACITY(QUANTITY), INTERACTIONS, TWO DIMENSIONAL, ACOUSTIC WAVES, THEORY, AIR FLOW, EFFICIENCY, THREE DIMENSIONAL, FINITE DIFFERENCE THEORY, CLUSTERING, WORK STATIONS, COMMUNICATION AND RADIO SYSTEMS, ARTIFICIAL INTELLIGENCE, MIGRATION, SUBSONIC CHARACTERISTICS, NUMERICAL METHODS AND PROCEDURES, AUTOMATIC, HYDRODYNAMICS, BOLTZMANN EQUATION.

Subject Categories : Computer Programming and Software
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE