Practical implications of fine-scale intermittency in turbulent flows

Podgórska, W.; Bałdyga, J.

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Tytuł artykułu

Practical implications of fine-scale intermittency in turbulent flows

Autorzy

Podgórska W. , Bałdyga J.

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Abstrakty

Many phenomena observed in chemical engineering and chemical technology processes and operations depend on the fine-scale properties of turbulence. Traditional theories are based on local average values of the rate of kinetic energy dissipation, the rates of strain, turbulent stresses, r.m.s. velocity fluctuations etc. A multifractal formalism is used to describe intermittency and in particular to express distributions of the above mentioned quantities. Multifractal formalism is used in this work to derive equations for the rates of drop breakage and coalescence, particle agglomeration, as well as maximum stable sizes of droplets and aggregates. It is shown how scaling-up intermittency changes the fine scale turbulence and its interactions with several processes. The limitations of CFD methods are discussed in this context.

Słowa kluczowe

agglomeration breakage coalescence turbulence

aglomeracja koalescencja turbulencja

Wydawca

West Pomeranian University of Technology. Publishing House

Czasopismo

Polish Journal of Chemical Technology

Rocznik

2006

Tom

Vol. 8, nr 1

Strony

79--86

Opis fizyczny

Bibliogr. 30 poz., rys.

Twórcy

autor

Podgórska W.

autor

Bałdyga J.

Department of Chemical and Process Engineering, Warsaw University of Technology, ul. Waryńskiego 1, 00-645 Warszawa, podgorsw@ichip.pw.edu.pl

Bibliografia

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Bibliografia

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