Enhancing impinging jet heat or mass transfer by fluidically generated flow pulsation

2009 ◽  
Vol 87 (2) ◽  
pp. 181-192 ◽  
Author(s):  
V. Tesař
Keyword(s):  
Mass Transfer ◽  
Impinging Jet ◽  
Flow Pulsation

scholarly journals Gas-phase Mass Transfer by Impinging Jet on Liquid Surface in Crucible

1984 ◽  
Vol 70 (1) ◽  
pp. 58-64 ◽  
Author(s):  
Hiroshi SAITO ◽  
Akinori YOSHIZAWA ◽  
Tanekazu SOMA
Keyword(s):  
Mass Transfer ◽  
Gas Phase ◽  
Liquid Surface ◽  
Impinging Jet

scholarly journals Heat and mass transfer enhancement strategies by impinging jets: A literature review

2020 ◽  
pp. 227-227
Author(s):  
Florin Bode ◽  
Claudiu Patrascu ◽  
Ilinca Nastase
Keyword(s):  
Heat Transfer ◽  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Large Scale ◽  
Impinging Jet ◽  
Impinging Jets ◽  
Nozzle Geometry ◽  
Small Scale ◽  
Mixing Enhancement ◽  
Transfer Enhancement

Heat and mass transfer can be greatly increased when using impinging jets, regardless the application. The reason behind this is the complex behavior of the impinging jet flow which is leading to the generation of a multitude of flow phenomena, like: large-scale structures, small scale turbulent mixing, large curvature involving strong normal stresses and strong shear, stagnation, separation and re-attachment of the wall boundary layers, increased heat transfer at the impinged plate. All these phenomena listed above have highly unsteady nature and even though a lot of scientific studies have approached this subject, the impinging jet is not fully understood due to the difficulties of carrying out detailed experimental and numerically investigations. Nevertheless, for heat transfer enhancement in impinging jet applications, both passive and active strategies are employed. The effect of nozzle geometry and the impinging surface macrostructure modification are some of the most prominent passive strategies. On the other side, the most used active strategies utilize acoustical and mechanical oscillations in the exit plane of the flow, which in certain situations favors mixing enhancement. This is favored by the intensification of some instabilities and by the onset of large scale vortices with important levels of energy.

Enhanced mass transfer by superimposed flow pulsation on continuous flow

2020 ◽  
Author(s):  
Abir Chakravorty
Keyword(s):  
Mass Transfer ◽  
Acetic Acid ◽  
Continuous Flow ◽  
Power Input ◽  
Flow Mode ◽  
Pulsation Frequency ◽  
Flow Pulsation ◽  
Liquid Mass ◽  
Pulsed Flow ◽  
Liquid Mass Transfer

We demonstrate experimentally the augmentation in liquid-liquid mass transfer due to flow pulsation on a continuous flow. Based on the observations we propose a Linton and Sherwood-like correlation determining extracted concentration at the exit of the test section in semi pulsatile flow conditions using 1D mass balance. Acetic acid is the diffusing species, whose transfer is to be maximized from the organic phase (toluene) in pulsed flow mode, and the aqueous phase (water) which is in the continuous flow mode together forming a slug-dispersed type of flow pattern in which toluene phase is dispersed as slugs and droplets in water phase when they merge together at the T-junction. The pulsed flow and the continuous flow are established by means of a dosing pump and centrifugal pump respectively. It is established that while the absolute transfer of acetic acid from toluene to water is maximized as the pulsation frequency and amplitude are increased, an economically viable operation, assessed through the transfer of acetic acid per unit power input, is established for moderate frequencies and amplitudes. This work will shed light on the optimization of such liquid-liquid mass transfer operations.

scholarly journals Experimental investigation of heat and mass transfer of an annular impinging jet

2021 ◽  
Vol 2039 (1) ◽  
pp. 012028
Author(s):  
M V Philippov ◽  
I A Chokhar ◽  
V V Terekhov ◽  
V I Terekhov ◽  
I N Baranov
Keyword(s):  
Heat Transfer ◽  
Mass Transfer ◽  
Experimental Study ◽  
Heat And Mass Transfer ◽  
Impinging Jet ◽  
Surface Cooling ◽  
Effective Surface ◽  
Flow And Heat Transfer ◽  
Annular Jet ◽  
Characteristic Features

Abstract This work presents an experimental study of a turbulent flow and heat transfer of an annular impinging jet for organizing effective surface cooling. Heat and mass transfer of the impinging annular jet was studied at Re = 5500. At that, a distance from the nozzle to the wall was varied. The focus was made on configurations with small nozzle-to-wall distances. It is shown that, depending on the indicated distance, fundamentally different flow regimes with characteristic features of heat transfer distribution are observed.

Mass transfer of an impinging jet confined between parallel plates

1993 ◽  
Vol 37 (2) ◽  
pp. 143-155 ◽  
Author(s):  
O. A. Moreno ◽  
R. H. Katyl ◽  
J. D. Jones ◽  
P. A. Moschak
Keyword(s):  
Mass Transfer ◽  
Impinging Jet ◽  
Parallel Plates
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