Modified Yield Power-Law fluid flow in narrow annuli with inner rotating pipe

Ofei, T.N. and Irawan, S. and Pao, W. and Osgouei, R.E. (2015) Modified Yield Power-Law fluid flow in narrow annuli with inner rotating pipe. Canadian Journal of Chemical Engineering, 93 (1). pp. 150-165. ISSN 00084034

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Abstract

A proposed viscosity model for Yield Power-Law fluid by Souza Mendes and Dutra (SMD), devoid of discontinuities at vanishing shear rate, is adopted in a 3D CFD simulation study. Radial distributions of axial, tangential, and coupled components of velocities are measured along concentric and eccentric narrow annuli. The flow is assumed to be fully-developed, laminar, and steady state. Several parameters such as diameter ratios, eccentricities, and inner pipe angular speeds were varied to analyze their influence on the flow distributions and annular pressure losses. The simulated results of radial distributions of axial and tangential velocities show good agreement with experimental data and analytic solutions from previous studies. Annular flow instabilities in the form of Taylor vortices in the flow fields are briefly discussed. This study shows how reliable CFD simulations can replicate the actual, yet complex, oil and gas drilling operations. © 2014 Canadian Society for Chemical Engineering.

Item Type: Article
Additional Information: cited By 10
Uncontrolled Keywords: Computer simulation; Oil well drilling; Viscosity; Vortex flow; Well drilling, Annular pressures; Drilling operation; Narrow annuli; Power law fluid; Radial distributions; Simulated results; Tangential velocities; Viscosity modeling, Computational fluid dynamics
Depositing User: Mr Ahmad Suhairi UTP
Date Deposited: 09 Nov 2023 16:18
Last Modified: 09 Nov 2023 16:18
URI: https://khub.utp.edu.my/scholars/id/eprint/6415

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