An empirical model of the wetted wall fraction in separated flows of horizontal and inclined pipes

Ahn, Taehwan; Moon, Joonho; Bae, Byeonggeon; Jeong, Joseph; Bae, Byoung-Uhn; Yun, Byong-Jo

doi:10.1016/j.ces.2017.12.031

Cited by 18 publications

(2 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, it is essential to understand the heat transfer process and its thermal performance. Generally, many studies have considered and investigated the two-phase flow in different geometries and different orientations using different approaches such as [3][4][5][6][7][8]. Basically, the heat transfer coefficient and temperature distribution inside the tube are the main parameters that need to be considered.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Coolant Side Characteristic on the Performance of Air-Cooled Condenser Structured by Horizontal Flattened Tube

Kamil¹,

Kassim²,

Mahmood³

2022

IJHT

View full text Add to dashboard Cite

The steam condensation process has been experimentally investigated in an air-cooled condenser (ACC). The ACC has been designed and built using a flattened cross-section horizontal tube. The flattened tube has an internal dimension of 102 mm x 12 mm with 4030 mm length. A range of vacuum operating conditions are applied to operate the ACC. In the experiments, parameters such as vacuum pressure, saturated temperature, wall tube temperature, rate of heat transfer, and local average steam heat transfer coefficient have been considered along the flow direction with the variation of cooling water temperature. The experimental results revealed that the steam saturated temperature and the related pressure decrease with the reduction of the cooling water temperature, and the temperatures of the upper and lower parts of the horizontal flattened tube. The results also showed that the local steam condensation heat transfer coefficient decreases along with the direction of the flow, but it there is incrementing with the decreasing of saturated steam temperature at a certain range of cooling water temperature.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Coolant Side Characteristic on the Performance of Air-Cooled Condenser Structured by Horizontal Flattened Tube

Kamil¹,

Kassim²,

Mahmood³

2022

IJHT

View full text Add to dashboard Cite

show abstract

“…In the reviewed literature, attention has been especially paid to the interface configuration with experimental measurement and numerical modelling, which would be expected to affect the wall perimeter wetted by the phase, flow area, and further velocity ratio. It is suggested that the shape of the interface exists at a certain degree of curve and can be roughly divided into three configurations: the flat, concave, and convex interface.…”

Section: Introductionmentioning

confidence: 99%

Discussion on the pressure drop calculation for oil‐water separated flow using a one dimensional two‐fluid model

et al. 2019

View full text Add to dashboard Cite

The purpose of this work is to seek the key factors influencing the pressure drop calculation for oil‐water separated flow using a one dimensional two‐fluid model. Closure relations published for the two‐fluid model such as interface configuration, wall, and interfacial shear stress correlations are summarized. Interface configurations are established by numerically solving the Young‐Laplace equation, correlated with the Bond number, contact angle, and water holdup. Results show that the interface transforms from concave to convex with the enlargement of the contact angle and becomes flat as the Bond number increases. For the pressure drop calculation, a limited difference of predicted accuracy between the curve and flat interface is found. Discussions of both the wall and interfacial friction factor correlation on the pressure drop calculation are performed. In contrast to the effect of the interfacial friction factor, the correlation of the wall friction factor is found to have more contributions. We validate the prediction accuracy of different wall frictions factors using eight groups of published experiment results, and one correlation is recommended and being further extended.

show abstract

Two-dimensional two-fluid model for air-oil wavy flow in horizontal tube

2019

View full text Add to dashboard Cite

An empirical model of the wetted wall fraction in separated flows of horizontal and inclined pipes

Cited by 18 publications

References 21 publications

Experimental Investigation of Coolant Side Characteristic on the Performance of Air-Cooled Condenser Structured by Horizontal Flattened Tube

Experimental Investigation of Coolant Side Characteristic on the Performance of Air-Cooled Condenser Structured by Horizontal Flattened Tube

Discussion on the pressure drop calculation for oil‐water separated flow using a one dimensional two‐fluid model

Two-dimensional two-fluid model for air-oil wavy flow in horizontal tube

Contact Info

Product

Resources

About