Numerical and experimental investigation of thermal convection for a thermodependent Herschel-Bulkley fluid in an annular duct with rotating inner cylinder

Nouar, Chérif; Desaubry, C.; Zenaidi, H.

doi:10.1016/s0997-7546(99)80018-1

Cited by 41 publications

(17 citation statements)

References 18 publications

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“…Nouar et al (1987) used CMC at a much higher concentration (3%), which they also modelled as a power-law fluid. Nouar et al (1998), on the other hand, adopted the Herschel-Bulkley model for their experiments with 0.2% Carbopol…”

Section: Viscosity Modelsmentioning

confidence: 99%

“…Ta=0), are a consequence of differences in the fluid rheology and in the Reynolds numbers. The data of Nouar et al (1998) (Fig. 4) are for 0.2% Carbopol, a Herschel-Bulkley (i.e.…”

Section: Concentric Annulus No Rotationmentioning

confidence: 99%

“…The data of Nouar et al (1998) for helical flow (Figs. 4, 6) again correspond to very low Re and Ta values.…”

Section: Concentric Annulus With Centrebody Rotation and Bulk Axial Flowmentioning

confidence: 99%

“…We are aware of only ten papers that provide experimentally determined velocity distributions for the laminar flow of non-Newtonian liquids through an annulus, and only half of these include the influence of inner cylinder rotation: those of Xisheng and Yinghu (1986), Nouar et al (1987), Whitelaw (1994, 1997), and Nouar et al (1998). This paucity of detailed experimental data may be attributed to the fact that only recently has suitable nonintrusive instrumentation (in the form of laser Doppler anemometry) been commercially available.…”

Section: Introductionmentioning

confidence: 99%

“…Xisheng and Yinghu (1986) provided limited data for the helical flow of 0.25% polyacrylamide through a concentric annulus with the flow modelled as a power-law fluid. Naimi et al (1990) and Nouar et al (1998) detail measurements of 0.2% Carbopol 940 for a concentric annulus with centrebody rotation. Although primarily concerned with turbulent flow, some data for nominally laminar flow of 0.2% CMC are reported by Nouri et al (1993) for axial flow in both a concentric and an eccentric annulus, by Nouri and Whitelaw (1994) for a concentric annulus with centrebody rotation, and by Nouri and Whitelaw (1997) for the eccentric case with inner cylinder rotation.…”

Section: Introductionmentioning

confidence: 99%

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Fully developed laminar flow of non-Newtonian liquids through annuli: comparison of numerical calculations with experiments

et al. 2002

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Experimental data are reported for fully developed laminar flow of a shear-thinning liquid through both a concentric and an 80% eccentric annulus with and without centrebody rotation. The working fluid was an aqueous solution of 0.1% xanthan gum and 0.1% carboxymethylcellulose for which the flow curve is well represented by the Cross model. Comparisons are reported between numerical calculations and the flow data, as well as with other laminar annular-flow data for a variety of shear-thinning liquids previously reported in the literature. In general, the calculations are in good quantitative agreement with the experimental data, even in situations where viscoelastic effects, neglected in the calculations, would be expected to play a role.

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Section: Viscosity Modelsmentioning

confidence: 99%

“…Ta=0), are a consequence of differences in the fluid rheology and in the Reynolds numbers. The data of Nouar et al (1998) (Fig. 4) are for 0.2% Carbopol, a Herschel-Bulkley (i.e.…”

Section: Concentric Annulus No Rotationmentioning

confidence: 99%

“…The data of Nouar et al (1998) for helical flow (Figs. 4, 6) again correspond to very low Re and Ta values.…”

Section: Concentric Annulus With Centrebody Rotation and Bulk Axial Flowmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fully developed laminar flow of non-Newtonian liquids through annuli: comparison of numerical calculations with experiments

et al. 2002

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

et al. 2014

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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.

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Fluid dynamics study of the flow and pressure drop analysis of a non‐Newtonian fluid through annular ducts with unusual cross‐sections

et al. 2016

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This paper concerns an experimental and computational study of the laminar flow developed by a pseudoplastic fluid through a partially-obstructed annulus, considering the effects of eccentricity and inner cylinder rotation. For the eccentric cases the eccentric rotation of the inner tube is applied, which is a novelty in the literature. Pressure drop experimental data are reported for flows of 3 and 9 m 3 /h of a 1 mg/g xanthan gum aqueous solution through a concentric and a 46 % eccentric annulus with partial obstruction of 6 mm, for cases with and without rotation of the inner cylinder (0 and 400 rpm). Numerical simulations were performed using computational fluid dynamics (CFD) techniques which allowed for reporting of axial velocity profiles, apparent viscosity distribution, and pressure drops for a range of eccentricity values (0, 23, and 46 %) and obstruction heights (0, 6, and 12 mm), which were systematically compared for cases with and without rotation of the inner tube (0 and 400 rpm). Comparisons between numerical calculations and the flow data indicated, in general, very close agreement. Eccentric rotation of the inner cylinder presented a distortion effect on the axial velocity and apparent viscosity profiles for the high eccentricity case (46 %) with high obstruction (12 mm), where two maxima regions were observed, one of them near the inner cylinder.

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Numerical and experimental investigation of thermal convection for a thermodependent Herschel-Bulkley fluid in an annular duct with rotating inner cylinder

Cited by 41 publications

References 18 publications

Fully developed laminar flow of non-Newtonian liquids through annuli: comparison of numerical calculations with experiments

Fully developed laminar flow of non-Newtonian liquids through annuli: comparison of numerical calculations with experiments

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

Fluid dynamics study of the flow and pressure drop analysis of a non‐Newtonian fluid through annular ducts with unusual cross‐sections

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