By G. Bärwolff, H. Wengle, H. Jeggle (auth.), S. Gavrilakis, L. Machiels, P. A. Monkewitz (eds.)

Advances in Turbulence VI offers an replace at the nation of turbulence examine with a few bias in the direction of examine in Europe, because it represents a virtually entire choice of the paper displays on the Sixth ecu Turbulence Conference, backed through EUROMECH, ERCOFTAC and price, and held on the Swiss Federal Institute of know-how in Lausanne, July 2-5, 1996. the matter of transition, including the structural description of turbulence, and the scaling legislation of absolutely constructed turbulence have persisted to obtain so much cognizance by way of the examine neighborhood and masses growth has been made because the final eu Turbulence convention in 1994. the quantity is hence geared in the direction of experts within the region of stream turbulence who couldn't attend the convention, in addition to anyone who needs fast to evaluate the main lively present learn parts and the teams linked to them.

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Additional info for Advances in Turbulence VI: Proceedings of the Sixth European Turbulence Conference, held in Lausanne, Switzerland, 2–5 July 1996

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Conclusions For the unsteady and quasi-periodic flow in the baffled stirred tank reactor considered here, the LES results are much better than those obtained so far using the RANS technique, especially those for the turbulence intensities. A few reasons for this have already been mentioned in Section 1. This clearly indicates the applicability (and potential) of LES for industrially relevant flow problems. Furthermore, the availability of accurate, dynamic, flow information will become more and more important in our design studies of equipment, such that there is a clear need for time-dependeIlt simulation techniques such as LES.

This latter approach has also the advantage that the required number of boundary conditions is reduced by one. 2. e. circular jets. For these flows one can avoid the difficulties arising from the additional boundary conditions and the need for computing the space averaged boundary values. For the circular jet, we use cartesian grids with a sequence of local grid refinements, Fuchs (1986), so that adequate spatial resolution can be attained. The filtered equations, including the SGS terms are discretised using fourth order accurate finite-differences, with the exception of convective terms which are approximated by third order accurate upwind (not strictly positive) finite-differences.

Akselvoll, K. , 1995, "LES of turbulent confined co annular jets and turbulent flow over a backward-facing step", Report TF-63, Stanford University. , Lesieur, M. , 1992, "Large and small-scale stirring of vorticity and a passive scalar in a 3D temporal mixing layer", Phys. Fluids, A4, pp 2761-2778. K. , 1980, "Turbulent flow re-attachment: an experimental study of the flow and structure behind a backward-facing step", Stanford University, Rep. MD-39. Jovic, S. , 1994, "Backward-facing step measurement at low Reynolds number Reh = 5000", Nasa technical memorandum 108 807.

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