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Experimental investigation on the effect of vibration on flow of liquid film in a horizontal duct

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Abstract

Effect of vibration on characteristics of a thin liquid film in a horizontal rectangular duct was studied experimentally in two flow regions viz, prebreak-up and break-up for Re f =400–900. The lower surface of the duct on which liquid film flows was subjected to external vibration in the range of 25–1000 Hz. The instantaneous film thickness which was recorded by conductivity measurement gauges was analysed statistically. Results of structural changes in liquid film due to external vibration and without it are reported in this paper.

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Abbreviations

A :

amplitude (μ)

B :

width of duct (m)

f :

frequency (Hz)

K :

kurtosis

Q :

volumetric flow per unit width (m3/s · m)

Re :

Reynolds number = V ⋆ B/v

V :

velocity (m/s)

S :

skewness

Sr :

Strouhal number = 〈δ f 〉 ⋆f/V f

δ:

film thickness (μ)

δ max/min :

relative maximum/minimum film thickness = δ max/minfi /δ max/minf=0

σ:

standard deviation

ν:

kinematic viscosity (m2/s)

〈 〉:

mean value

cr :

critical

f :

film, frequency

g :

gas

i :

ith/instantaneous

max:

maximum

min:

minimum

w :

wave

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Author notes

  1. S. Saha

    Present address: Reactor Project Division, Bhabha Atomic Research Centre, 400 085, Bombay, India

Authors and Affiliations

  1. Department of Steam and Gas Turbines, Moscow Power Engineering Institute, St. Krasnokazarmennaya, 14, Moscow, Russia

    S. Saha, G. V. Tomarov & O. A. Povarov

Authors
  1. S. Saha
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  2. G. V. Tomarov
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  3. O. A. Povarov
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Additional information

The authors gratefully acknowledge the assistance of Dr. R. B. Grover of Reactor Project Division of Bhabha Atomic Research Centre through his helpful suggestions while preparing this manuscript

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Saha, S., Tomarov, G.V. & Povarov, O.A. Experimental investigation on the effect of vibration on flow of liquid film in a horizontal duct. Experiments in Fluids 19, 383–387 (1995). https://doi.org/10.1007/BF00190255

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  • DOI: https://doi.org/10.1007/BF00190255

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