Experimental investigation on the performance of drag reducing polymers through two pipe diameters in horizontal oil–water flows

Al-Wahaibi, Talal; Al-Wahaibi, Yahya; Al-Ajmi, A.; Yusuf, Nurudeen; Al-Hashmi, A.R.; Olawale, A.S.; Mohammed, I.A.

doi:10.1016/j.expthermflusci.2013.05.014

Cited by 35 publications

(18 citation statements)

References 13 publications

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“…The focus of the current research is therefore to find the solution of reducing skin friction drag. Drag reduction can be achieved either by adding small amounts of additives such as polymers (Al-Wahaibi et al, 2013), surfactants (Li et al, 2006), particles (Pang et al, 2011), etc., which can alter the fluid composition and then affect its flow resistance, or by using passive devices such as grooves (Quintavalla et al, 2013) or superhydrophobic coatings (Moaven et al, 2013) which directly affect the flow without altering the fluid.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Collaborative Drag Reduction Performance of a Surfactant Solution in Grooved Channels

Huang

Wei

2017

Braz. J. Chem. Eng.

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Turbulence with a relatively larger vortex is obtained in drag-reducing surfactant solution, which provides an excellent condition for the application of small scale grooves. In this work, the coupling drag reduction performance of surfactant solution and grooves was experimentally investigated to explore the complementary possibility between their drag reduction mechanisms. The cationic surfactant cetyltrimethyl ammonium chloride (CTAC) mixed with the counterion salt sodium salicylate (NaSal) was experimented in smooth or grooved channel, respectively, at the mass concentrations of 50-150 ppm. It was found that the surfactant solutions gave more effective drag reduction in the grooved channel by the interaction between the "restriction effect" and "peak effect" of grooves. Moreover, the critical temperature and critical Reynolds number of the surfactant solution were smaller in the grooved channel, and the friction factor in the grooved channel increased much more rapidly than that in the smooth channel when Re is larger than a critical value.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on the Collaborative Drag Reduction Performance of a Surfactant Solution in Grooved Channels

Huang

Wei

2017

Braz. J. Chem. Eng.

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“…[127] reported that stratified flow (ST) regime (in the case of air-SCMC solution) occupied a larger region of the flow pattern map compared to air-water flow. The extension of the ST flow regime is an indication of turbulence suppression and this effect has been reported for DRPs application in straight pipes [122]. In a separate report that focuses on mass transfer characteristics of air-SCMC solution in helical coils, it was reported that mass transfer (kl) was higher for Newtonian water flow than for SCMC solution and it decreases with SCMC concentration [128].…”

Section: Two-phase Flow With Drag-reducing Agents In Curved Pipesmentioning

confidence: 86%

“…Research has shown that liquid-liquid properties such as density, viscosity and interfacial tension have profound effects of pressure drop and flow pattern characteristics [7,119,120]. It has also been established that flow patterns and fluid characteristics such as interfacial tension play important role in determining the effectiveness of drag reducing agents [121][122].…”

Section: Two-phase Flow With Drag-reducing Agents In Curved Pipesmentioning

confidence: 99%

Drag Reduction by Additives in Curved Pipes for Single-Phase Liquid and Two-Phase Flows: A Review

Ayegba¹,

Edomwonyi‐Otu²,

Abubakar³

et al. 2020

Preprint

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A review of influence of drag-reducing agents on curved pipe flows is presented in this work. In addition, this review outlined proposed mechanism, friction factor and fluid flux models for drag-reducing agents in curved pipe flows. Our finding reveals that drag reduction by additives in curved pipes is quite significant but generally lower than the corresponding drag reduction in straight pipes. It decreases with increase in curvature ratio and more pronounced in the transition and turbulent flow regimes. Drag reduction strongly depends on the polymers and surfactants' concentrations as well as the bubble fraction of micro-bubbles. It is also reported that drag reduction in curved pipes depends on temperature and existence of dissolved salts in the fluids. Maximum drag reduction asymptote differed between straight and curved pipes and between polymer and surfactant. No definite conclusion could be drawn as regards drag reduction for two-phase flow in curved pipes due to the limited studies in this area. Many questions such as the mechanism of drag reduction in curved pipes and how drag-reducing agents interact with secondary flows still remained unanswered. Hence, some research gaps have been identified with recommendations for areas of future researches.

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“…Also, the drag reduction was found to rise by about 24 % with higher nanofluid concentration in some tests. The effects of small changes of pipe diameter on drag reduction were reported by Karami and Mowla and Al‐Wahaibi et al . In addition, the influences of a copolymer of acrylamide and sodium acrylate on annular air‐water flow in pipes with an inner diameter ( ID ) of 9.53 and 2.54 cm, respectively, were investigated by Al‐Sarkhi and Hanratty .…”

Section: Introductionmentioning

confidence: 94%

Prediction of Field Drag Reduction by a Modified Practical Pipe Diameter Model

Zhao

Chen

Liu³

et al. 2018

Chem Eng & Technol

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Slick water fracturing is a successful stimulation technology for gas shales. Due to the high pumping rates associated with slick water fracturing, drag reduction (DR) is critical to the success of field operations. In this study, three drag-reducing agents were tested in a laboratory setup and the results were compared with data from numerous slick water fracturing treatments in the field in China. The results show that, as long as the slopes of effective pipe radius versus velocity from the laboratory-scale tubes and from the field pipes are close, field drag reduction can be predicted by a modified correlation between DR and velocity established in the laboratory. The modified practical pipe diameter model should be useful in the design of slick water fracturing treatments and the selection of drag-reducing agents in the laboratory.

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Experimental investigation on the performance of drag reducing polymers through two pipe diameters in horizontal oil–water flows

Cited by 35 publications

References 13 publications

Experimental Study on the Collaborative Drag Reduction Performance of a Surfactant Solution in Grooved Channels

Experimental Study on the Collaborative Drag Reduction Performance of a Surfactant Solution in Grooved Channels

Drag Reduction by Additives in Curved Pipes for Single-Phase Liquid and Two-Phase Flows: A Review

Prediction of Field Drag Reduction by a Modified Practical Pipe Diameter Model

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