Statistics of numerically generated turbulence

✍ Scribed by H. I. Andersson; R. Kristoffersen

• Publisher: Springer Netherlands
• Year: 1992
• Tongue: English
• Weight: 968 KB
• Volume: 26
• Category: Article
• ISSN: 0167-8019
• DOI: 10.1007/bf00047209

✦ Synopsis

This paper considers numerically generated turbulence obtained by integrating the complete time-dependent three-dimensional Navier--Stokes equations. The simulated unidirectional turbulent flow, bounded by two parallel planes, is strongly inhomogeneous in the direction normal to the planes but homogeneous in the parallel directions. The resulting flow field, which is considered a numerical realization of fully developed turbulent channel flow, contains detailed information on spatial coherent flow structures as well as on the time-dependency and statistics of the three-dimensional velocity and pressure fields. Focussing here on the statistics of the numerically generated turbulence, second-moments and higher-moments are presented and compared with the most recent PTV and LDV laboratory measurements. It is concluded that direct numerical simulations are an invaluable approach to turbulence which complements field studies and laboratory investigations. Numerical experiments are now becoming a principal source of detailed and reliable information, which play a key role in the deepening of our understanding of turbulent flow phenomena.