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Research Papers: Multiphase Flows

Motion of a Single Newtonian Liquid Drop Through Quiescent Immiscible Visco-Elastic Liquid: Shape and Eccentricity

[+] Author and Article Information
Ritu Gupta

Department of Chemical Engineering and Technology, Panjab University, Chandigarh 160014, India

R. K. Wanchoo1

Department of Chemical Engineering and Technology, Panjab University, Chandigarh 160014, Indiawanchoo@pu.ac.in

1

Corresponding author.

J. Fluids Eng 131(2), 021301 (Jan 09, 2009) (11 pages) doi:10.1115/1.3054284 History: Received January 05, 2008; Revised October 22, 2008; Published January 09, 2009

The shape of a single Newtonian liquid drop moving freely under gravity in quiescent non-Newtonian liquid (visco-inelastic and visco-elastic) has been studied. Strong effect of fluid elasticity on the shape of Newtonian liquid drop has been observed. Based on experimental observations, a shape regime graph has been suitably modified for elastic fluids. Correlations have also been proposed for the prediction of eccentricity of the Newtonian liquid drop moving through a non-Newtonian visco-elastic liquid.

Copyright © 2009 by American Society of Mechanical Engineers
Topics: Drops , Shapes , Fluids
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References

Figures

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Figure 7

Effect of continuous liquid viscosity on drop eccentricity for Newtonian liquids

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Figure 8

Effect of drop diameter on drop eccentricity for non-Newtonian (visco-inelastic) liquids

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Figure 9

Effect of interfacial tension on drop eccentricity for non-Newtonian (visco-inelastic) liquids

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Figure 10

Effect of flow consistency index (K) on drop eccentricity for non-Newtonian (visco-inelastic) liquids

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Figure 11

Effect of drop diameter on drop eccentricity for non-Newtonian (visco-elastic) liquids

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Figure 12

Effect of interfacial tension on drop eccentricity for non-Newtonian (visco-elastic) liquids

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Figure 1

Reference glass particle: (a) characterization of the drop shape

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Figure 2

(a) Representative photographs of Newtonian drops in Newtonian liquids, (b) representative photographs of Newtonian drops in non-Newtonian (visco-inelastic) liquids, and (c) representative photographs of Newtonian drops in non-Newtonian (visco-elastic) liquids

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Figure 3

Effect of drop diameter on drop eccentricity for Newtonian liquids

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Figure 4

Effect of interfacial tension on drop eccentricity for Newtonian liquids

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Figure 5

Effect of dispersed phase density on drop eccentricity for Newtonian liquids

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Figure 6

Effect of dispersed liquid viscosity on drop eccentricity for Newtonian liquids

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Figure 13

Effect of fluid characteristic time on drop eccentricity for non-Newtonian (visco-elastic) liquids

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Figure 14

Shape regimes for Newtonian liquid drop in Newtonian and non-Newtonian (visco-inelastic and visco-elastic) liquids

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Figure 15

(a) Parity between Ecalc (Eq. 13) and Eobs for viscous Newtonian systems (prolate) and (b) parity between Ecalc (Eq. 12) and Eobs for viscous Newtonian systems (oblate)

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Figure 16

Parity between Ecalc (Eqs. 12,13) and Eobs for non-Newtonian visco-inelastic systems

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Figure 17

Observed drop eccentricity data for non-Newtonian visco-elastic liquids

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Figure 18

Parity between Ecalc (Eq. 18) and Eobs for non-Newtonian visco-elastic systems (prolate)

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Figure 19

Parity between Ecalc (Eq. 19) and Eobs for non-Newtonian visco-elastic systems (oblate)

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Figure 20

Parity between eccentricity from literature data and calculated eccentricity using the present model (Eqs. 12,13 and Eqs. 18,19)

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