Analysis of an organized turbulent structure using a pattern recognition technique in a drag-reducing surfactant solution flow

Hara, Shumpei; Ryusuke,; Tsukahara, Takahiro; Kawaguchi, Yasuo

doi:10.1016/j.ijheatfluidflow.2016.08.015

Cited by 7 publications

(1 citation statement)

References 31 publications

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“…The DRP pipeline injection problems include the following: Models that can illustrate particularly inter-phase interaction, dispersion, and mixing of DRP with the fluid of interest under turbulent flow dynamics are fairly inadequate [54,55]. Research in this area can significantly improve DRP injection methodology.…”

Section: Turbulent Mixing and Dispersion Models In Transportation Pipmentioning

confidence: 99%

Energy-Saving UHMW Polymeric Flow Aids: Catalyst and Polymerization Process Development

et al. 2019

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Crude oil and refinery products are transported worldwide to meet human energy needs. During transportation via pipeline, huge pumping power is required to overcome the frictional pressure drop and the associated drag along the pipeline. The reduction of both is of great interest to industry and academia. Highly expensive ultrahigh molecular weight (UHMW, MW a million Dalton) drag reducing polymers (DRPs) are currently used to address this problem. The present paper, therefore, emphasizes particularly the development of a high-performance catalyst system that synthesizes DRPs (using higher alpha-olefins)—a highly promising cost reduction alternative. This homogeneous catalyst system features a new concept that uses a cost-effective titanium-based Ziegler–Natta precatalyst and a cocatalystLewis base complex having both steric hindrance (around N heteroatom) and electronic effect. This novel work, which involves precatalyst–cocatalyst molecular separation and cocatalystmonophenyl amine association-dissociation phenomena, already generated several US patents. The subject catalyst prepares UHMW DRPs at room temperature, avoiding the use of zero and sub-zero temperatures. The resulting product almost tripled the rate of transportation of a selected grade of refinery product and saved about 50% pumping energy at ppm level pipeline concentration. It is also very easily soluble. Hence, massive modification of existing pipeline will be unnecessary. This will save additional infrastructure cost. This paper also summarizes challenges facing the development of improved heterogeneous catalysts, dispersed polymerization process, molecular simulation-based DRP product formulation, and model/theory of turbulent mixing and dispersion in the transportation pipeline setting.

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Section: Turbulent Mixing and Dispersion Models In Transportation Pipmentioning

confidence: 99%

Energy-Saving UHMW Polymeric Flow Aids: Catalyst and Polymerization Process Development

et al. 2019

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Formation of viscoelastic micellar solutions by a novel cationic surfactant and anionic salt system

Bao

Zhang

Gang

et al. 2021

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Experimental investigation of streamwise velocity fluctuation based on the Reynolds-number dependency in turbulent viscoelastic-fluid flow

Hara

Tsukahara

Kawaguchi

2017

International Journal of Heat and Fluid Flow

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Analysis of an organized turbulent structure using a pattern recognition technique in a drag-reducing surfactant solution flow

Cited by 7 publications

References 31 publications

Energy-Saving UHMW Polymeric Flow Aids: Catalyst and Polymerization Process Development

Energy-Saving UHMW Polymeric Flow Aids: Catalyst and Polymerization Process Development

Formation of viscoelastic micellar solutions by a novel cationic surfactant and anionic salt system

Experimental investigation of streamwise velocity fluctuation based on the Reynolds-number dependency in turbulent viscoelastic-fluid flow

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