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TECHNICAL BRIEFS

Comments on Reynolds Number Definition for the Discharge of non-Newtonian Liquids from Tanks

[+] Author and Article Information
Marek Dziubiński

Faculty of Process and Environmental Engineering, Lodz Technical University, Wolczanska 213, 93-005 Lodz, Polanddziubin@wipos.p.lodz.pl

Andrzej Marcinkowski

Faculty of Process and Environmental Engineering, Lodz Technical University, Wolczanska 213, 93-005 Lodz, Poland

J. Fluids Eng 127(5), 1043-1046 (May 20, 2005) (4 pages) doi:10.1115/1.1989374 History: Received June 08, 2004; Revised May 20, 2005

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Copyright © 2005 by American Society of Mechanical Engineers
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Figures

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Figure 2

Formation of liquid velocity profiles during discharge of 1.6% CMC solution from a tank through the orifice of L∕d=3,d=8mm. Rheological liquid parameters k=0.115Pasn,n=0.756.

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Figure 3

Constant F in Eq. 3 in different cross sections of the discharge orifice at different distances z∕d. Symbols as in Fig. 5.

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Figure 4

Comparison of constant Fav obtained on the basis of numerical calculations and correlation equation 6 for different orifice geometries L∕d and different liquids. Symbols as in Fig. 5.

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Figure 5

Dependence of discharge coefficient on the Reynolds number 9 for selected orifice geometries L∕d

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Figure 6

Correlation of experimental data by Eq. 10

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Figure 1

Distribution of local velocities (m∕s) and pressure (Pa) in the orifice region for the discharge of 1.6% CMC solution, L∕d=1,d=17mm,H=0.13m

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