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A modelling study of evolving particle-laden turbulent pipe-flow

DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf.1470
12 pages

T. Stromgren
Linné Flow Centre, Department of Mechanics, KTH, Osquars backe 18, SE-100 44, Stockholm, Sweden

Geert Brethouwer
Linne FLOW Centre, KTH Mechanics Royal Institute of Technology 100 44 Stockholm, Sweden

G. Amberg
Department of Mechanics, Linne Flow Center, Royal Institute of Technology, Osquars Backe 18, 10044 Stockholm, Sweden

Arne V. Johansson
Linne FLOW Centre, Dept. of Mechanics, Royal Institute of Technology SE-100 44 Stockholm, Sweden

Abstract

An Eulerian turbulent two phase flow model in cylindrical coordinates was developed in order to study evolving turbulent gas particle flows in a downward pipe flow. The model takes the feedback of the particles into account. Simulations showed good agreement with experiments and shows that the pipe length required for particle laden turbulent pipe flow to become fully developed is four times longer than for unladen flows, even for rather low mass loadings. The slip velocity was found to increase with Stokes numbers, St, and mass loadings. The accumulation of particles in the near wall region showed a nonmonotonic behaviour and was found to be strongest for St=0.5.

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