A review of drag reduction and heat transfer enhancement by riblet surfaces in closed and open channel flow

Soleimani, Shima; Eckels, Steven J.

doi:10.1016/j.ijft.2020.100053

Cited by 42 publications

(14 citation statements)

References 81 publications

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“…Zhu et al investigated the nature-inspired structures in this field [5]. Soleimani and Eckels obtained benefit of riblets to drag reduction in a circular closed channel [6]. However, lack of experimental data to validate the result is still prominent in most works.…”

Section: Riblets In Drag Reductionmentioning

confidence: 99%

Enhancing Surface Heat Transfer Characteristics Using Laser Texturing

Ghahramani¹,

Sharp²,

Morgan³

et al. 2023

Heat Transfer - Fundamentals, Enhancement and Applications

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The use of a pulsed laser system to manufacture parallel streamwise riblets on the plates of a heat exchanger is reported. There are certain laser system elements that can influence the quality of a micrometre texture geometry; among these, there was a focus on laser incubation effect on obtaining greater depth of the riblets. Surface roughness was always considered to keep the heat transfer efficiency high. The heat exchanging process was measured in two flow regimes: laminar and turbulent. In laminar flow, the surface texture slightly deteriorated the heat transfer rate. However, small improvement in the heat transfer rate was observed in turbulent flow.

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Section: Riblets In Drag Reductionmentioning

confidence: 99%

Enhancing Surface Heat Transfer Characteristics Using Laser Texturing

Ghahramani¹,

Sharp²,

Morgan³

et al. 2023

Heat Transfer - Fundamentals, Enhancement and Applications

View full text Add to dashboard Cite

show abstract

“…There is a theory that the surface based on the sharkskin groove structure will have a greater DR effect in circular cross-section channels than in rectangular channels. 27 Bechert and Bartenwerfer 28 tested the effect of adjustable surfaces with longitudinal riblets and additional slits on the shear stress of turbulence, studied the DR of microgrooves in oil channels, and found that using these surfaces can reduce the drag by 5−10%. They believed that the height and width of microgrooves determine the DR capability, and the DR can only be achieved within a certain range of aspect ratio.…”

Section: Biomimetic Microgroove Drag Reductionmentioning

confidence: 99%

Drag Reduction Related to Boundary Layer Control in Transportation of Heavy Crude Oil by Pipeline: A Review

Jing,

Guo,

Karimov

et al. 2023

Ind. Eng. Chem. Res.

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With the depletion of conventional light crude oil, heavy crude oil will occupy an increasing share of the energy structure in the 21st century. Heavy crude oil is characterized by an API gravity of 10 to 22.3 or a viscosity of 0.09 to 10 Pa·s. The flow of heavy crude oil in the pipeline is laminar in the higher viscosity range and turbulent in the lower viscosity range, and its flow resistance comes from the viscous force between the oil and the wall or the additional stress of turbulent flow. Hence, pipeline transportation of heavy crude oil is faced with a huge loss of frictional resistance, which means a reduction of the transportation efficiency. To decrease pump power consumption, improving the transportation efficiency of heavy crude oil pipelines is a key factor. In recent years, some biomimetic technologies that reduce the flow resistance of viscous oils have made new progress in improving their fluidity and have not yet been put into use in commercial pipelines. Therefore, it is important and appropriate to discuss the breakthrough achievements and progress made by researchers in the drag reduction (DR) of heavy crude oil and to summarize its advantages, disadvantages, and potential problems. This review discusses boundary layer control methods for heavy crude oil drag reduction. First, conventional DR technologies, such as polymers, surfactants, fiber suspensions, oil–water core annular flow (CAF) and oil–aqueous foam CAF, and potential DR technologies, including oleophobic surfaces, flexible walls, biomimetic microgrooves, and ferrofluid annular DR under magnetic confinement, are presented. Second, the mechanism of DR is investigated and summarized; the highlights and progress of the technology are reviewed, and new ideas to improve the existing DR technology are proposed. Finally, the challenges and prospects of DR are presented.

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“…In the last few decades, attempts have been made to make transport mediums more sustainable and energy efficient [12]. It is well-known that the turbulent wake aft of flat-back bluff bodies is characterized by massive separation resulting in large pressure drag and increased vehicle fuel consumption [13,14]. Sweeping jet actuators (SWJ) have been increasingly popular in the exploration of drag reduction, and have been applied to various generic models of terrestrial vehicles [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%