(2006). A Study of Flow and Mixing in Bubbly Gas-Liquid Pipe Flow Generated by a Grid. Iranian Journal of Chemical Engineering(IJChE), 3(4), 60-75.
. "A Study of Flow and Mixing in Bubbly Gas-Liquid Pipe Flow Generated by a Grid". Iranian Journal of Chemical Engineering(IJChE), 3, 4, 2006, 60-75.
(2006). 'A Study of Flow and Mixing in Bubbly Gas-Liquid Pipe Flow Generated by a Grid', Iranian Journal of Chemical Engineering(IJChE), 3(4), pp. 60-75.
A Study of Flow and Mixing in Bubbly Gas-Liquid Pipe Flow Generated by a Grid. Iranian Journal of Chemical Engineering(IJChE), 2006; 3(4): 60-75.
A Study of Flow and Mixing in Bubbly Gas-Liquid Pipe Flow Generated by a Grid
The spreading of a tracer in a bubbly two-phase grid-generated turbulent flow systemis studied. In this work both particle image velocimetry (PIV) and planer laser-inducedfluorescence (PLIF) are used to study the effect of the dispersed phase flow rate on themixing characteristics of the tracer. The turbulent intensity of the continuous phase inthe bubbly two-phase grid-generated turbulent flow is close to isotropic, and increasingthe gas void fraction reduces the degree of non-isotropicity. The self-similarity of meanand RMS values of the cross-stream concentration distribution is observed. A newmathematical model is suggested to describe the self-similarity of the cross-streamprofiles of the mean concentration based on two separate Gaussian curves into thecentral and outer region of the flow. The turbulent diffusivity is calculated using theTaylor hypothesis, which is based on the growth of the variance of the cross-streamprofiles of the mean concentration, with a position along the direction of the flow. Anincrease in the void fraction does not affect the diffusivity of the superimposeddistribution of the plume in the central region, however it did increase in the outerregion.
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