Question For Euler–Lagrange Type Simulator
From A View Point Of Macroscopic Properties Of
Gas-liquid Multiphase Flow
Author(s)
K. Ueyama
Abstract
Corrections to the conventional two-fluid model equations are briefly illustrated,
showing the general expression of the two-fluid model equation without any
restriction on averaging, the general expression of the interaction term with
‘inside-out’ property, and the corrected two-fluid model equation with a new and
novel term reflecting the ‘inside-out’ property of the interaction term.
On the basis of the corrected two-fluid model equation, several questions are
stated and discussed for Euler–Lagrange type simulator with respect to the
moving velocity of individual drop and fluctuating motion of drops, and new
concepts for Euler–Lagrange and Euler–Euler type of simulators are proposed
focusing on the fluctuating motion of drops, which is one of the representative
phenomena in the dispersed multiphase flow.
Keywords: fluctuating motion of drops, dispersion of drops, Euler–Lagrange
type simulator, Euler–Euler type simulator.
1 Introduction
Recently, a flaw in the basis of the conventional two-fluid model equation based
on volume-averaging was revealed [8]. It was shown that the restriction, that the
control volume must be between the drop size and the scale of macroscopic
variations, was unrealistic for treating multiphase flow with spatial variation of
macroscopic properties, and the two-fluid equation has been derived without any
restriction on averaging, by combining volume-averaging and time-averaging.
The most important founding in the work is that the interaction term has \“inside-
Keywords
fluctuating motion of drops, dispersion of drops, Euler–Lagrangetype simulator, Euler–Euler type simulator
Related Book
Other papers in this volume
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