Book ChapterDOI
Direct Contact Heat Transfer Between Immiscible Liquids
TLDR
In this paper, heat transfer to drops moving in a constant-temperature field and continuously varying temperature field is discussed, and three models are taken into account: rigid drop, completely mixed drop, and drop with internal circulation.Abstract:
Publisher Summary The basic characteristics of heat transfer between dispersed and continuous media are of both scientific and practical interest. The advantages of direct-contact heat transfer over the conventional processes using metallic transfer surfaces have lately stimulated research on its utilization for water desalination projects. Despite intensive efforts toward better understanding of transfer phenomena between drops and continuous media, accurate prediction of the transfer coefficients for a given system can as yet only be hoped for. Nevertheless, accumulated experience may provide an indication of the transfer mechanism to be encountered and the relevant coefficients may be estimated accordingly. This chapter discusses heat transfer to drops moving in a constant-temperature field and continuously varying temperature field. Heat is transferred to drops and bubbles with simultaneous phase change. While discussing about constant-temperature field, three models are taken into account: rigid drop, completely mixed drop, and drop with internal circulation. Work on direct-contact heat exchangers was stimulated earlier by the quest for economic water-desalination units. Multiphase exchange, where latent heat is transferred among the immiscible fluids, has been effectively used in direct-contact freezing units in which a dispersed volatile fluid evaporates in the saline water with simultaneous freezing of part of the water.read more
Citations
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Longitudinal dispersion in two-phase continuous-flow operations: solution and tables for cocurrent flow
TL;DR: In this article, the mathematical derivation of solutions for longitudinal dispersion in chemical-process equipment is extended to the case of cocurrent flow and the extent of completion of the process, in dimensionless form, is given as an analytical function of rates of dispersion.
Journal ArticleDOI
Investigation of flow and temperature patterns in direct contact condensation using PIV, PLIF and CFD
TL;DR: In this paper, the authors used Particle Image Velocimetry (PIV) and Planar Laser Induced Fluorescence (PLIF) to measure the velocity and temperature of steam injected centrally at the bottom of a vertical rectangular water vessel.
Journal ArticleDOI
Gas‐Liquid Direct‐Contact Evaporation: A Review
TL;DR: In this paper, a review of the literature regarding gas-liquid direct contact evaporators is presented, addressing classic and potential applications, bubble regimes, gas holdup and bubble size distributions, as well as mathematical models proposed for simulating the unit.
Book ChapterDOI
Direct Contact Condensation
TL;DR: Direct contact condensation (DCC) as mentioned in this paper is used in many chemical process industries, usually for quenching and partial or total condensation, particularly when corrosive vapors are involved.
Simulation of heat and mass transfer in spray drying
TL;DR: In this article, a survey of heat and mass transfer around droplets in spray dryers and the diffusional transport inside them is given, which includes variable diffusion coefficients in the drying liquid and swelling or shrinking of droplets.
References
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Journal ArticleDOI
Liquid-Liquid Extraction from Single Drops
Journal ArticleDOI
Solute Transfer from Single Drops in Liquid-Liquid Extraction
William Licht,William F. Pansing +1 more
Journal ArticleDOI
Mass Transfer from Individual Gas Bubbles
Journal ArticleDOI
Direct contact heat transfer with change of phase: Effect of the initial drop size in three-phase heat exchangers
TL;DR: The initial drop size of volatile fluids evaporating within immiscible, nonvolatile liquids was experimentally related to the overall heat transfer coefficient in single and multiparticle systems.
Journal ArticleDOI
A Study of Circulation Patterns within Liquid Drops moving through a Liquid
TL;DR: The technique used to reveal the circulation patterns was developed by Hagerty, and depends on the striae which appear in glycerine and glycerina-water mixtures when sheared as mentioned in this paper.
Related Papers (5)
Direct-contact heat transfer with change of phase: Evaporation of drops in an immiscible liquid medium
Samuel Sideman,Yehuda Taitel +1 more
Direct contact heat transfer with change of phase: Spray‐column studies of a three‐phase heat exchanger
Samuel Sideman,Yehuda Gat +1 more