Hydrodynamics of non-Newtonian two-phase flow in pipes

Srivastava, Raunak; Narasimhamurty, G. S. R.

doi:10.1016/0009-2509(73)80052-1

Cited by 9 publications

(2 citation statements)

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“…As an annular flow is often understood through triangular relationship, the empirical relationship among film thickness, pressure drop, and flowrates (Srivastava and Narasimhamurty, 1973;Tyagi and Srivastava, 1976;Xu et al, 2007) has been previously analyzed. Srivastava and his co-worker (Srivastava, 1977;Tyagi and Srivastava, 1976) proposed a non-Newtonian liquid-gas annular flow model to predict liquid holdup and two-phase pressure drop.…”

Section: Introductionmentioning

confidence: 99%

A simple model for predicting the pressure drop and film thickness of non-Newtonian annular flows in horizontal pipes

Wong

Skote

et al. 2013

Chemical Engineering Science

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Section: Introductionmentioning

confidence: 99%

A simple model for predicting the pressure drop and film thickness of non-Newtonian annular flows in horizontal pipes

Wong

Skote

et al. 2013

Chemical Engineering Science

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“…The injection of gas reduced the internal friction in the pipe when conveying the shear-thinning fluid. As a result, the pressure gradient was reduced, and drag reduction was achieved (Srivastava & Narasimhamurty, 1973). These studies indicate that gas-assisted transport can reduce drag under certain conditions, but specific methods have not been proposed.…”

mentioning

confidence: 98%

Determination of the Drag Reduction Mechanism Associated with the Pneumatic Regulation of Slurry Pipeline Transport using a Numerical Method

Chen¹,

Xing²,

Wu³

et al. 2019

JAFM

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The technological parameters associated with the pneumatic regulation of slurry pipeline transport have been explored to reduce the energy consumption of the transport system and prolong the transport distance in dredging cases. In this study, a numerical method is employed to discretize and solve the established threedimensional physical model, which consists of a dual Eulerian model of multiphase flow, the standard k-ε model of turbulence, and a homogeneous flow model for slurry. The simulated pressure drop values are consistent with the experimental results for transport with gas injection. In addition, the influence of the gas phase on the flow characteristics in the pipeline is analyzed, and the mechanism of the drag reduction is revealed. The presence of the gas film reduces the wall shear stress between the slurry and the pipe wall, which is the root cause of the drag reduction. Under the control of pneumatic regulation, the flow state tends to stabilize in the fully developed section of the pipe, and injection does not interfere with transport.

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