The effect of polyacrylamide drag reducing agent on friction factor and heat transfer coefficient in laminar, transition and turbulent flow regimes in circular pipes with different diameters

Varnaseri, M.; Peyghambarzadeh, S.M.

doi:10.1016/j.ijheatmasstransfer.2020.119815

Cited by 17 publications

(7 citation statements)

References 56 publications

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“…This can be attributed to the significant level of turbulence, and the frictional pressure gradient in the smaller pipe diameter compared to the larger diameter. These results are in good agreement with the findings of (Varnaseri and Peyghambarzadeh 2020). According to the elastic sub-layer model proposed by Virk (Virk, Sherman et al 1997), as the concentration of additives increases, the elastic sub-layer expands, and the friction factor decreases.…”

Section: Effect Of the Pipe Diametersupporting

confidence: 90%

“…Furthermore, the mechanism of DRPs and the level of drag reduction have been investigated extensively and attributed to the flowrate (Li, Sun et al 2022), the concentration of DRPs (Wei, Jia et al 2022), temperature (Orang and Pouranfard 2022), flow channel geometry (Varnaseri andPeyghambarzadeh 2020, Ayegba, Edomwonyi-Otu et al 2021), flow orientation (Al-Wahaibi, Abubakar et al 2017), phase distribution (Shah, Ghaemi et al 2022, Tan, Hu et al 2022, and DRP molecular weight and its bond structure Mowla 2013, Eshrati, Al-Wahaibi et al 2022).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Drag Reducing Polymers in Multi-phase Flow Pipelines: Energy-Saving and Future Directives

Alsurakji

Al–Sarkhi

El‐Qanni

et al. 2023

Preprint

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Frictional pressure drop has been grasping the attention of many industrial applications associated with multi-phase and academia. Alongside the United Nations, the 2030 Agenda for Sustainable Development calls for the exigency of giving attention to economic growth, a considerable reduction in power consumption is necessary to co-up with this vision and to adhere to energy-efficient practices. Thereinto, drag-reducing polymers (DRPs), which do not require additional infrastructure, are a much better option for increasing energy efficiency in a series of critical industrial applications. Therefore, this study evaluates the effects of two DRPs―polar water-soluble polyacrylamide (DRP-WS) and nonpolar oil-soluble polyisobutylene (DRP-OS)―on energy efficiency for single-phase water and oil flows, two-phase air-water and air-oil flows, and three-phase air-oil-water flow. The experiments were conducted using two different pipelines; horizontal polyvinyl chloride with an inner diameter of 22.5 mm and horizontal stainless steel with a 10.16 mm internal diameter. The energy-efficiency metrics are performed by investigating the head loss, percentage saving in energy consumption (both per unit pipe length), and throughput improvement percentage (%TI). Irrespective of flow types and variation in liquid and air flow rates, experiments conducted for both DRPs in larger pipe diameter were found to reduce head loss and increase saving in energy consumption and throughput improvement percentage. In particular, DRP-WS is found to be more promising as an energy saver and the consequent savings in the infrastructure cost. Hence, equivalent experiments of DRP-WS in two-phase air-water flow using a smaller pipe diameter show that the head loss drastically increases. However, the percentage saving in power consumption and throughput improvement percentage is significantly compared with that found in the larger pipe. Thus, this study found that DRPs can improve energy efficiency in various industrial applications, with polar water-soluble polyacrylamide being particularly promising as an energy saver. However, the effectiveness of these polymers may vary depending on the flow type and pipe diameter.

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Section: Effect Of the Pipe Diametersupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Drag Reducing Polymers in Multi-phase Flow Pipelines: Energy-Saving and Future Directives

Alsurakji

Al–Sarkhi

El‐Qanni

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…In some investigations, it was argued that there was an interaction between the viscoelastic property of drag-reducing polymer solution and the intensity of the turbulent flow. The viscoelastic property of the polymer solution could reduce the intensity of the turbulent flow. − Large aggregates and polymer entanglements may play a significant part in the turbulent DR mechanism. − The existence of a polymer in the turbulent flow reduces the shear stress at the wall as a result of the viscoelastic properties of the polymer solution. , As can be seen from Figures and , zwitterionic PAM exhibits the most excellent viscosity-enhancing property in solution and therefore the most obvious viscoelasticity in water, thus maximizing the suppression of energy dissipation due to turbulent vortices during flow.…”

Section: Resultsmentioning

confidence: 99%

Critical Role of Ionic Properties on the Turbulence Drag Reduction Performance of Various Polyacrylamide Polymers in Liquid

Yang

Jing

et al. 2023

Ind. Eng. Chem. Res.

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Polymer-induced drag reduction flow has been widely investigated. However, the underlying mechanism of how the ionic properties of polymers affect their turbulence drag reduction performance remains unclear. This study reports an experimental investigation of the turbulent drag reduction performance of polyacrylamides (PAMs) with different ionic properties. The factors influencing the drag reduction performance of PAM solutions were explored, including flow time, concentration, turbulence intensity, and solution pH value. Meanwhile, the experimental results of turbulence drag reduction over a circular tube were verified against the classical Virk's asymptote. It turned out that the experimentally obtained friction factors for the chosen PAM solutions of four ionic properties were close to the theoretical values and lie between the classical Newtonian turbulence and the Virk maximum drag reduction asymptote. The mechanism of turbulent drag reduction induced by PAMs with different ionic properties has been explored, and it turned out that the ionic properties of polymers play an important role in their drag reduction performance. In general, zwitterionic PAM shows the best turbulence drag reduction, anionic and nonionic PAMs are similar, and cationic PAM ranks last in terms of the effect of turbulence drag reduction. The increase of turbulence intensity and flow time will lead to the decrease of drag reduction effect; the increase of polymer solution concentration and pH value is beneficial to improve drag reduction rate.

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“…Since as the pipe diameter and flow velocity increase, there is a reduction in the estimated error. Pipes with smaller diameters present an impediment in the flow of energy, resulting in changes in the viscosity of the fluid, making it difficult to pass (Varnaseri & Peyghambarzadeh, 2020).…”

Section: Resultsmentioning

confidence: 99%

Modelling the Darcy–Weisbach friction factor and the energy gradient of the lateral line*

Jardim

Silva

et al. 2021

Irrigation and Drainage

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The objective was to adjust explicit mathematical models to determine the friction factor ( f ). Besides, an adaptation of the Blasius model is presented and an application of the Darcy-Weisbach equation to estimate the energy loss along the lateral line for four types of microsprinklers. f was determined by the model of Offor and Alabi and the model of Blasius for velocities between 0.5 to 3.0 m s À1 and internal pipe diameters of 0.0130, 0.0161, 0.0206, 0.0270, 0.0288, and 0.0368 m. The friction factor determined by Offor and Alabi was associated with the pipe diameters utilizing regression, and based on that an adaptation to the Blasius model was proposed. From the results of f, the energy and flow gradient along the lateral line for four NaanDanJain microsprinklers was simulated. The models of Offor and Alabi, Blasius, and Adapted Blasius showed excellent precision in determining f. The results of unit head loss, determined by the three mathematical models, showed dispersion close to zero among the pairs, showing a high correlation between the models (R 2 = 0.99).The Blasius equation is the most suitable to be inserted into the Darcy-Weisbach model to determine the maximum length of the lateral line.

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The effect of polyacrylamide drag reducing agent on friction factor and heat transfer coefficient in laminar, transition and turbulent flow regimes in circular pipes with different diameters

Cited by 17 publications

References 56 publications

Drag Reducing Polymers in Multi-phase Flow Pipelines: Energy-Saving and Future Directives

Drag Reducing Polymers in Multi-phase Flow Pipelines: Energy-Saving and Future Directives

Critical Role of Ionic Properties on the Turbulence Drag Reduction Performance of Various Polyacrylamide Polymers in Liquid

Modelling the Darcy–Weisbach friction factor and the energy gradient of the lateral line*

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