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ISSN: 1065-3090 Print
ISSN: 1940-4336 Online
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DOI: 10.1615/JFlowVisImageProc.v14.i2
Pages: 105
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DOI: 10.1615/JFlowVisImageProc.v14.i2.60
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Article price - $35.00 |
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DIRECT NUMERICAL SIMULATION OF TURBULENT CHANNEL FLOW WITH MIXED SPECTRAL-FINITE DIFFERENCE TECHNIQUE
Giancarlo Alfonsi
Universitè della Calabria
Leonardo Primavera
CESIC — Supercomputing Center for Computational Engineering, Fluid Dynamics Division, Università della Calabria, Via P. Bucci 22b, 87036 Rende (Cosenza)
ABSTRACT
The flow of a viscous incompressible fluid in a plane channel is simulated numerically with the use of a computational code for numerical integration of the Navier−Stokes equations. The numerical method is based on a mixed spectral-finite difference algorithm. The calculations in the two homogeneous directions (the streamwise and the spanwise) are performed in the Fourier space and second-order finite differences are used in the direction orthogonal to the walls. A turbulent-flow database representing the turbulent statistically steady state of the velocity field through 10 viscous time units is assembled at a nominal friction Reynolds number Reτ = 180. A number of turbulence statistics is computed, showing a good agreement with numerical results in particular obtained by other authors with fully spectral codes.
pages 225-243
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