Gravity-driven flow of liquid films and droplets in horizontal tube banks

Killion, Jesse D.; Garimella, Srinivas

doi:10.1016/s0140-7007(03)00009-4

Cited by 81 publications

(22 citation statements)

References 23 publications

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“…The flow patterns over rectangular horizontal tubes are similar to those over horizontal round tubes, which were described in detail by Killion and Garimella (2003). A brief description is presented here.…”

Section: Progression Of the Interfacementioning

confidence: 72%

“…Such interactions are frequent occurrences, particularly at high flow rates. The possible behaviors resulting from these interactions are similar to those in flow over round tubes, which were documented by Killion and Garimella (2003). They are not examined in detail here.…”

Section: Progression Of the Interfacementioning

confidence: 75%

“…Yung et al (1980) investigated the droplet spacing, droplet diameter, and droplet deflection due to crossflow in falling-film evaporators with horizontal round tubes, and established conditions under which these considerations are important. More recently, Killion and Garimella (2003) used highspeed video to identify deviations from the idealized film behavior often assumed in horizontal tube falling-film models. These characteristics included development of droplet formation sites, the progression of shapes during droplet development, the formation, stretching, and breakup of the liquid bridge, satellite droplets, waves, and interaction between each mechanism.…”

Section: Introductionmentioning

confidence: 99%

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Dominant flow mechanisms in falling-film and droplet-mode evaporation over horizontal rectangular tube banks

Bustamante

Garimella

2014

International Journal of Refrigeration

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Flow visualization with high-speed video of evaporating water films falling over flat horizontal tubes, representative of the external surfaces of microchannel tubes, is presented. Experiments were conducted with 1.4 mm thick and 27 mm tall tubes over a film Reynolds number range of 23 < Re < 126. In addition to a qualitative description of the flow mechanisms, this work quantifies key droplet and wave characteristics using image analysis techniques. A semi-autonomous edge-detection technique is used to develop a mathematical description of the droplets and waves, allowing the surface area, volume, velocity, and frequency of the droplets, as well as the width, surface area, and velocity of the waves, to be measured. The results are useful for developing accurate, phenomena-based models for falling-film evaporation over flat horizontal tube banks.

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Section: Progression Of the Interfacementioning

confidence: 72%

Section: Progression Of the Interfacementioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

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Dominant flow mechanisms in falling-film and droplet-mode evaporation over horizontal rectangular tube banks

Bustamante

Garimella

2014

International Journal of Refrigeration

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“…Concentration and temperature boundary conditions at the inlet (6). Concentration and temperature boundary conditions on the tube wall surface (7).…”

Section: Mathematical Descriptionmentioning

confidence: 99%

Predicted Effect Of Flowrate And Cooling Temperature On Horizontal Round Tube Absorber Of A Pair Working Fluid NH3- H2O

Nguyen¹,

Le²,

Hoang³

2016

IOSR

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The performance of the absorption refrigeration system depends much on the absorber. The falling film absorption and bubbleabsorption studies performedexperimentallyand numericallyfor completed absorbers. This paper focuses on evaluating the parameters affecting the coupled heat-mass transfer as NH 3 -H 2 O diluted solution flowing on horizontal round tubes absorbsNH 3 vapor to become the stronger concentratedsolution. The fields ofvelocity, temperature, concentration and thickness of the falling film solution varied by the input conditions of diluted solution and cooling water temperature flowing in the tube represented by a test volume element of thetube.The two-dimensional numerical simulation is written by the Matlab programming language to solve partial differential equations predicting absorption efficiency while changing the parameters affecting the absorption process.

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“…Most of the already conducted investigations have been focused on the analysis of the heat-mass transfer phenomena and have attempted to combine the two other levels of modelling based on simplifying assumptions. Killion and Garimella [1,2] have recently presented two comprehensive review papers, covering all the modelling and experimental studies of absorption of water-vapour in liquid falling films that have been published during the years. Various absorber geometries and working fluids have been investigated.…”

Section: Introductionmentioning

confidence: 99%

A detailed analysis of water-vapour absorption in LiBr–H2O solution on a cooled horizontal tube

Papaefthimiou

Karampinos

Rogdakis

2006

Applied Thermal Engineering

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Gravity-driven flow of liquid films and droplets in horizontal tube banks

Cited by 81 publications

References 23 publications

Dominant flow mechanisms in falling-film and droplet-mode evaporation over horizontal rectangular tube banks

Dominant flow mechanisms in falling-film and droplet-mode evaporation over horizontal rectangular tube banks

Predicted Effect Of Flowrate And Cooling Temperature On Horizontal Round Tube Absorber Of A Pair Working Fluid NH3- H2O

A detailed analysis of water-vapour absorption in LiBr–H2O solution on a cooled horizontal tube

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