Author
M. Song
Bio: M. Song is an academic researcher. The author has contributed to research in topics: Nusselt number & Drop (liquid). The author has an hindex of 3, co-authored 4 publications receiving 46 citations.
Papers
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TL;DR: In this article, the population balance equation (PBE) is solved using operator splitting, in which size growth, coalescence, breakage and other phenomena of particles (such as nucleation) can be included.
28 citations
TL;DR: In this paper, a detailed analysis of the influence of several important parameters, such as the breakage of droplets, the driving temperature difference, the initial mean diameter of drops from the bottom distributor, and the maximum diameter of stable drobbles on the direct-contact evaporation process in a bubble column is presented.
11 citations
TL;DR: In this paper, the exact relationship between target quantities and influence quantities are given, from which the exact column height required for complete evaporation and the temperature of continuous phase at the end of a spray column are given.
6 citations
TL;DR: In this article, the authors established the mathematical model of heat transfer for a moving ellipsoidal drop in an immiscible liquid, and presented results from numerical calculation, which is suitable for a relatively large range of We and Pe.
Abstract: Since Sideman et al.[1] derived an analytical solution of the Nusselt number for a spherical drop in the direct contact evaporation in an immiscible liquid, many researchers have performed theoretical research on this field under different assumptions [2]-[6]. However drops moving in another immiscible liquid do not take a spherical form, but oblate form, which may be well approximated as an ellipsoid. This paper establishes the mathematical model of heat transfer for a moving ellipsoidal drop in an immiscible liquid, and presents results from numerical calculation. The relationship of the Nusselt number with the Weber number and the Peclet number is given, which is suitable for a relatively large range of We and Pe. The theoretical results for the Nusselt number show good agreement with experimental data. Some important conclusions are obtained.
2 citations
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01 Oct 2007
TL;DR: In this paper, a comprehensive introduction to the fundamentals and applications of flow and heat transfer in conventional and miniature systems is provided, providing a comprehensive review of single-phase flow fundamentals and interfacial phenomena, detailed and clear discussion is provided on a range of topics, including two-phase hydrodynamics and flow regimes, mathematical modeling of gas-liquid 2-phase flows, pool and flow boiling, flow and boiling in mini and microchannels, external and internal-flow condensation with and without noncondensables, condensation in small flow passages, and two-
Abstract: Providing a comprehensive introduction to the fundamentals and applications of flow and heat transfer in conventional and miniature systems, this fully enhanced and updated edition covers all the topics essential for graduate courses on two-phase flow, boiling, and condensation. Beginning with a concise review of single-phase flow fundamentals and interfacial phenomena, detailed and clear discussion is provided on a range of topics, including two-phase hydrodynamics and flow regimes, mathematical modeling of gas-liquid two-phase flows, pool and flow boiling, flow and boiling in mini and microchannels, external and internal-flow condensation with and without noncondensables, condensation in small flow passages, and two-phase choked flow. Numerous solved examples and end-of-chapter problems that include many common design problems likely to be encountered by students, make this an essential text for graduate students. With up-to-date detail on the most recent research trends and practical applications, it is also an ideal reference for professionals and researchers in mechanical, nuclear, and chemical engineering.
270 citations
TL;DR: In this article, a fixed-pivot (GFP) technique is used to discretize the droplet diameter (internal coordinate) in a convective dominant partial differential equation (PDE) model.
88 citations
01 Oct 2007
73 citations
TL;DR: In this paper, the authors use a discrete element simulation approach rather than direct application of population balance equations to determine the evolution of particle size distributions, by simulating the effects of particle interactions based on physically significant coalescence criteria.
68 citations
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.
Abstract: Gas-liquid direct-contact evaporators are characterized by the bubbling of a superheated gas through the solution to be concentrated. In other words, they are nonisothermal bubble columns. Despite their simplicity of construction, these units exhibit rather complex hydrodynamics and, similar to what occurs to isothermal bubble columns, the design of such units still poses a problem. The present paper reviews the literature regarding this kind of equipment, addressing both experimental studies and modeling efforts. The covered issues include classic and potential applications, bubbling regimes, gas holdup and bubble size distributions, as well as mathematical models proposed for simulating the unit. Additionally, pertinent literature on isothermal bubble columns is also discussed. Recommendations are made for future research.
57 citations