Prediction and New Insight for the Drag Reduction of Turbulent Flow with Polymers and Its Degradation Mechanism

Zhang, Xin; Dai, Xiaodong; Han, Qiaorong; Zhao, Jianqiang; Jing, Dengwei; Liu, Fei; Li, Lei; Xin, Yanping; Liu, Kun

doi:10.1021/acs.jpclett.1c02027

Cited by 10 publications

(2 citation statements)

References 43 publications

(85 reference statements)

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“…Hoyt et al , proposed one model for the prediction of friction factor: R e f / d was a constant when polymer type, molecular weight, and polymer concentration were the same. In our previous work, , we extract data from previous research and rearrange them in a Prandtl–von Karman coordinate with log 10 ( Re f ) vs 1 / f . The results showed that all data can be fitted in a straight line, which follows the format in eq .…”

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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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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“…However, among these agents, DRPs have been considered the most efficient (Eshrati, Al-Wahaibi et al 2022). Additionally, a literature survey of the published work on DRPs in multi-phase flow pipelines assured the growing interest , Edomwonyi-Otu, Dosumu et al 2021, Zhang, Dai et al 2021, Eshrati, Al-Wahaibi et al 2022, Mortimer and Fairweather 2022, Tan, Hu et al 2022. In addition to drag reduction, the aforementioned studies reported that DRPs can change the configurations of the co-existing phases.…”

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

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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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Experimental insights into energy savings and future directions of drag reducing polymers in multiphase flow pipelines

Alsurakji

Al–Sarkhi²,

El‐Qanni

et al. 2023

Sci Rep

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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). The larger pipe diameter was used in experiments for both DRPs, and it was discovered that despite the type of flow or variations in liquid and air flow rates, there was a reduction in head loss, an increase in energy savings, and an increase in the 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 DRP-WS 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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Prediction and New Insight for the Drag Reduction of Turbulent Flow with Polymers and Its Degradation Mechanism

Cited by 10 publications

References 43 publications

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

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

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

Experimental insights into energy savings and future directions of drag reducing polymers in multiphase flow pipelines

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