This article is cited in 8 papers

Comparison of the Eulerian and Lagrangian approaches in studying the flow pattern and heat transfer in a separated axisymmetric turbulent gas–droplet flow

M. A. Pakhomov, V. I. Terekhov

S.S. Kutateladze Institute of Thermophysics, Siberian Division of the Russian Academy of Sciences, Novosibirsk, 630090, Russia

Abstract: The Eulerian and Lagrangian approaches are used to perform a numerical study of the disperse phase dynamics, turbulence, and heat transfer in a turbulent gas–droplet flow in a tube with sudden expansion with the following ranges of two-phase flow parameters: initial droplet size $d_1= 0-200$ $\mu$m and mass fraction of droplets $M_{L1}=0-0.1$. The main difference between the Eulerian and Lagrangian approaches is the difference in the predictions of the droplet mass fraction: the Eulerian approach predicts a smaller value of $M_L$ both in the recirculation region and in the flow core (the difference reaches $15-20\%$). It is demonstrated that the disperse phase mass fraction calculated by the Lagrangian approach agrees better with measured data than the corresponding value predicted by the Eulerian approach.

Keywords: Eulerian and Lagrangian approaches, separated gas–droplet flow, turbulence, dispersion and evaporation of droplets.

UDC: 539.24

Received: 29.10.2012
Revised: 15.01.2013

 English version: Journal of Applied Mechanics and Technical Physics, 2013, 54:4, 596–607

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