LIQUID EVAPORATION BY DIRECT CONTACT IN ANOTHER IMMISCIBLE LIQUID

1986 ◽  
Author(s):  
Lounes Tadrist ◽  
Ibraheem Shehu Diso ◽  
M. Larini ◽  
J. Pantaloni
Keyword(s):  
Direct Contact ◽  
Immiscible Liquid ◽  
Liquid Evaporation

scholarly journals Direct contact evaporation of a single two-phase bubble in a flowing immiscible liquid medium. Part I: two-phase bubble size

2019 ◽  
Vol 55 (9) ◽  
pp. 2593-2603
Author(s):  
Hameed B. Mahood ◽  
Ali Sh. Baqir ◽  
Al-Dunainawi Yousif ◽  
Anees A. Khadom ◽  
Alasdair N. Campbell
Keyword(s):  
Liquid Medium ◽  
Bubble Size ◽  
Direct Contact ◽  
Immiscible Liquid ◽  
Two Phase

Electrically Induced Shape Oscillation of Drops as a Means of Direct-Contact Heat Transfer Enhancement: Part 1—Drop Dynamics

1988 ◽  
Vol 110 (3) ◽  
pp. 695-699 ◽  
Author(s):  
N. Kaji ◽  
Y. H. Mori ◽  
Y. Tochitani
Keyword(s):  
Direct Contact ◽  
Low Frequency ◽  
Immiscible Liquid ◽  
Contact Heat ◽  
Resonant Oscillation ◽  
Liquid Drops ◽  
Contact Heat Exchange ◽  
Second Mode ◽  
Shape Oscillation ◽  
Sinusoidal Waveform

The shape oscillation of liquid drops passing through an immiscible liquid medium subject to a low-frequency (1 ∼ 16 Hz) alternating electric field having a sinusoidal waveform has been studied experimentally with the intention of investigating the enhancement of the direct-contact heat exchange between the two liquids. We have found that the field can induce, depending on its frequency, not only the resonant oscillation of the second mode of the drops, but also another peculiar oscillation that is related to the resonant oscillation of the third mode superposed on the second-mode oscillation.

Heat Transfer With Vaporization of a Liquid by Direct Contact in Another Immiscible Liquid: Experimental and Numerical Study

1991 ◽  
Vol 113 (3) ◽  
pp. 705-713 ◽  
Author(s):  
L. Tadrist ◽  
J. Sun ◽  
R. Santini ◽  
J. Pantaloni
Keyword(s):  
Heat Transfer ◽  
Theoretical Model ◽  
Void Fraction ◽  
Direct Contact ◽  
Numerical Study ◽  
Water System ◽  
Immiscible Liquid ◽  
Transfer Model ◽  
Two Phase ◽  
Spray Column

An experimental setup was designed to study direct-contact evaporators using a liquid dispersed in another immiscible liquid. The study was carried out on an n-pentane–water system to determine the influence of different parameters on these systems, and consequently to construct a model for this type of evaporator. An optical probe was used to measure the local void fraction. At different column abscissas along a selected diameter, the local void fraction variations were determined. The shape of the curves can be attributed to the different processes occurring in the spray column. A one-dimensional heat transfer model in the spray column was established. Simplifying assumptions were used to establish and resolve the set of equations governing heat transfer and two-phase flow. The vaporization process induces a volumetric expansion of the two-phase mixture. A theoretical model was used, in which the coalescence between the spherical fluid particles is taken into account. Different coalescence laws dependent on particle density were introduced into the theoretical model and then tested. The numerical results are discussed and compared with the experimental data obtained for the n-pentane–water system.

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