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Fast Imaging Technique to Study Drop Impact Dynamics of Non-Newtonian Fluids

Fast Imaging Technique to Study Drop Impact Dynamics of Non-Newtonian Fluids

Published on: March 5, 2014

Optical technique for the study of convective diffusion from falling drops.

T P Pandya¹, A K Saxena, B C Srivastava

¹Department of Physics, Lucknow University, Lucknow, India.

The Review of Scientific Instruments

|January 1, 1978

Summary

A new deflection mapping technique accurately measures mass transfer rates from falling liquid drops. This method also enables simultaneous measurement of the diffusion coefficient, aligning well with theoretical predictions.

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Published on: March 6, 2020

Area of Science:

Chemical Engineering
Fluid Dynamics
Physical Chemistry

Background:

Mass transfer is crucial in chemical processes.
Accurate measurement of mass transfer coefficients is essential for process design and optimization.
Existing methods may have limitations in dynamic scenarios like free-falling drops.

Purpose of the Study:

To apply a novel deflection mapping technique for measuring mass transfer rates.
To validate the technique's accuracy against theoretical models.
To simultaneously determine the diffusion coefficient of the liquid system.

Main Methods:

Utilized a deflection mapping technique to analyze liquid drop behavior.
Conducted experiments with freely falling liquid drops in a distinct liquid medium.
Performed simultaneous measurements of mass transfer and diffusion coefficients.

Main Results:

The deflection mapping technique successfully measured the rate of mass transfer.
Experimental results showed good agreement with theoretical predictions.
The diffusion coefficient was accurately determined concurrently with mass transfer measurements.

Conclusions:

The deflection mapping technique is a reliable method for quantifying mass transfer from falling drops.
The study validates the theoretical understanding of mass transfer in such systems.
This technique offers a dual capability for measuring both mass transfer and diffusion coefficients.