High-resolution turbulent simulations using the Connection Machine-2

Journal Article · Sun Nov 01 04:00:00 EST 1992 · Computers in Physics; (United States)

DOI:https://doi.org/10.1063/1.168444· OSTI ID:6991297

Chen, S; Shan, X ^[1]

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1. Center for Nonlinear Studies and Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

The spectral method provides an efficient algorithm for solving the three dimensional incompressible Navier--Stokes equations in periodic boundaries. Most people, so far, have used vectorized machines, such as the CRAY-2, to implement fast Fourier transformations and time integrations in the spectral calculations. In this paper, new results are presented using the spectral calculations on the Connection Machine-2 with a parallel algorithm. The large memory of the Connection Machine-2 and the parallel algorithm allows one, for the first time, to implement a 512[sup 3] mesh resolution for high Reynolds number flows. The computational speed of the present code is about 30% faster than the fastest CRAY-2 simulations with four processors. Parallel machines, such as the Connection Machine-2, will possibly provide new computational power for understanding the intermittency and cascade mechanism in fluid turbulence.

• DOE Contract Number: FG02-85ER53194
• OSTI ID: 6991297
• Journal Information: Computers in Physics; (United States), Journal Name: Computers in Physics; (United States) Vol. 6:6; ISSN 0894-1866; ISSN CPHYE2
• Country of Publication: United States
• Language: English

Related Subjects

661300* -- Other Aspects of Physical Science-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALGORITHMS
COMPUTERIZED SIMULATION
COMPUTERS
DIFFERENTIAL EQUATIONS
DIGITAL COMPUTERS
EQUATIONS
FLUID FLOW
INCOMPRESSIBLE FLOW
MATHEMATICAL LOGIC
NAVIER-STOKES EQUATIONS
NUMERICAL SOLUTION
PARALLEL PROCESSING
PARTIAL DIFFERENTIAL EQUATIONS
PROGRAMMING
REYNOLDS NUMBER
SIMULATION
SUPERCOMPUTERS
TURBULENT FLOW