Flow condensation in horizontal tubes

Lee, Hyoungsoon; Mudawar, Issam; Hasan, Mohammad M.

doi:10.1016/j.ijheatmasstransfer.2013.06.044

Cited by 25 publications

(11 citation statements)

References 46 publications

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“…For instance, the Hajal flow pattern map [9] is expected to be reliable when the tube diameter changes from 3.14 mm to 21.4 mm. It should be noted that interfacial waves play a vital role in the transport behavior of adiabatic, evaporating and condensing flow [10].…”

Section: Introductionmentioning

confidence: 99%

Viscous Kelvin–Helmholtz instability analysis of liquid–vapor two-phase stratified flow for condensation in horizontal tubes

Liu

Wang

Guojun

et al. 2015

International Journal of Heat and Mass Transfer

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Section: Introductionmentioning

confidence: 99%

Viscous Kelvin–Helmholtz instability analysis of liquid–vapor two-phase stratified flow for condensation in horizontal tubes

Liu

Wang

Guojun

et al. 2015

International Journal of Heat and Mass Transfer

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“…Greek Symbols : Volume fraction tp : Heat transfer coefficient of two phases, W m −2 K −1 : Interfacecurvature,m −1 : Molecularthermalconductivity,Wm −1 K −1 : Molecular dynamic viscosity, Pa s : Turbulent viscosity, Pas : Density,kgm −3 : Surface tension, N m −1 : Specific dissipation rate of , s −1 Φ : Pressure strain term in (10) : Dissipation term in (10).…”

Section: Discussionmentioning

confidence: 99%

Numerical Simulation on Forced Convective Condensation of Steam Upward Flow in a Vertical Pipe

Qiu

Cai

et al. 2014

Advances in Mechanical Engineering

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A transient three-dimensional volume of fluid (VOF) simulation on condensation of upward flow of wet steam inside a 12 mm i.d. vertical pipe is presented. The effect of gravity and surface tension are taken into account. A uniform wall temperature has been fixed as boundary conditions. The mass flux is 130∼6400 kg m −2 s −1 and the turbulence inside the vapor phase and liquid phase have been handled by Reynolds stress model (RSM). The vapor quality of fluid is 0∼0.4. The numerical simulation results show that, in all the simulation conditions, the bubbly flow, slug flow, churn flow, wispy annular flow, and annular flow are observed; in addition, the results of flow pattern are in good agreement with the regime map from Hewitt and Roberts. The typical velocity field characteristic of each flow pattern and the effect of velocity field on heat transfer of condensation are analyzed, indicating that the slug flow and churn flow have obvious local eddy. However, no obvious eddy is observed in other flow patterns and the streamlines are almost parallel to the flow direction. The simulation results of heat transfer coefficients and frictional pressure drop show good agreement with the correlations from existing literatures.

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“…Comparison of heat transfer coefficients predicted by the Rifert et al [14] method with experimental data in condensing propylene, propane, dimethyl ether, isobutene [17] and FC-72 [18] is shown in Figs. 1-2.…”

Section: Analysis Of Theoretical Solutionsmentioning

confidence: 99%

“…The analysis of the theory [10] shows that for β > 10 (under the influence of vapour velocity on heat transfer) and Pr l = 1-3 under the changes of Re l from 8 • 10 2 to 2 • 10 4 , the impact of Re l on Nu f can be neglected. Figure 3 shows the influence of [24] for steam at Pr l = 0.95, β = 150; 2 -data from Lee et al [18] for fluid FC-72 at Pr l = 8.2, β = 40; 3 -data from Yu et al [30], Rifert et al [14], Park et al [17], Kwon et al [31] for freon R22 and from Kim et al [28] for carbon dioxide at Pr l = 2.4, β = 10; 4 -data from Kim et al [28] for carbon dioxide at Pr l = 2.4, β = 100; 5 -data from Boyko et al [24] for steam at Pr l = 0.95, β = 100 Fig. 3 displays, only at high vapour velocities (β more than 100) there is an insignificant decrease of Nu f with an increase of Re l .…”

Section: Substantiation and The Range Of Application Of A New Semi-emmentioning

confidence: 99%

Substantiation and the range of application of a new method for heat transfer prediction in condensing inside plain tubes

Rifert¹,

Sereda²,

Горін³

et al. 2018

energetika

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Since the first work of Tepe and Mueller and until now, there have been published hundreds of studies with the results of heat transfer investigations in vertical and horizontal tubes with vapour condensing of various liquids. Dozens of methods and formulae based both on the results of the theoretical research and on the experimental data have been proposed. The existence of more than 50% discrepancy in different experimental data and various empirical and theoretical relationships is shown. Thus, the absence of both substantiation of different methods and explanations of methods disagreement both between themselves and with different experiments is noted. Also, there are often no remarks concerning boundaries for the use of proposed relationships. There is proposed a simple semi-empirical correlation for heat transfer prediction in condensing inside the plain tubes at the annular and intermediate flow of the phases. This correlation is based on the nature of film condensation process and on the specific features of the results of theoretical solutions. The range of application of complexes, which determine the heat transfer process, is also substantiated. Good convergence of the new method with the experimental data on condensation of steam, carbon dioxide, hydrocarbon refrigerants and other various fluids inside horizontal and vertical tubes is shown.

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Flow condensation in horizontal tubes

Cited by 25 publications

References 46 publications

Viscous Kelvin–Helmholtz instability analysis of liquid–vapor two-phase stratified flow for condensation in horizontal tubes

Viscous Kelvin–Helmholtz instability analysis of liquid–vapor two-phase stratified flow for condensation in horizontal tubes

Numerical Simulation on Forced Convective Condensation of Steam Upward Flow in a Vertical Pipe

Substantiation and the range of application of a new method for heat transfer prediction in condensing inside plain tubes

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