Plasma turbulence calculations on the Intel iPSC/860 (rx) hypercube

Conference · Mon Jan 01 04:00:00 EST 1990

OSTI ID:6378468

Lynch, V E ^[1]; Carreras, B A; Drake, J B; Leboeuf, J N ^[2]; Ruiter, J R ^[3]

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1. Oak Ridge National Lab., TN (USA). Computing and Telecommunications Div.
2. Oak Ridge National Lab., TN (USA)
3. Albion Coll., MI (USA)

One approach to improving the real-time efficiency of plasma turbulence calculations is to use a parallel algorithm. A serial algorithm used for plasma turbulence calculations was modified to allocate a radial region in each node. In this way, convolutions at a fixed radius are performed in parallel, and communication is limited to boundary values for each radial region. For a semi-implicity numerical scheme (tridiagonal matrix solver), there is a factor of 3 improvement in efficiency with the Intel iPSC/860 machine using 64 processors over a single-processor Cray-II. For block-tridiagonal matrix cases (fully implicit code), a second parallelization takes place. The Fourier components are distributed in nodes. In each node, the block-tridiagonal matrix is inverted for each of allocated Fourier components. The algorithm for this second case has not yet been optimized. 10 refs., 4 figs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6378468
• Report Number(s): CONF-910207-1; ON: DE91004773
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700103* -- Fusion Energy-- Plasma Research-- Kinetics
ALGORITHMS
CHARGED-PARTICLE TRANSPORT
COMPUTER CALCULATIONS
COMPUTERS
EQUILIBRIUM
HYPERCUBE COMPUTERS
MATHEMATICAL LOGIC
MHD EQUILIBRIUM
PARALLEL PROCESSING
PLASMA
PROGRAMMING
RADIATION TRANSPORT
TURBULENCE