Mixed convection from a hemisphere in Bingham plastic fluids

Nalluri, Soumya; Patel, Swati A.; Chhabra, R.P.

doi:10.1016/j.ijheatmasstransfer.2014.12.059

Cited by 13 publications

(2 citation statements)

References 36 publications

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“…They found that heat transfer decreases with an increase of Bingham number and aspect ratio. Mixed convection in a Bingham plastic fluid from a heated hemi-sphere has been investigated numerically in the so-called aiding buoyancy configuration by Nalluri et al [Nalluri, Patel and Chhabra (2015)], for different Reynolds, Prandtl, Richardson and Bingham numbers.…”

Section: Introductionmentioning

confidence: 99%

Mixed Convection of Bingham Fluid in a Two Sided Lid-Driven Cavity Heated From Below

Benmalek

Souidi

Moderres

et al. 2019

Fluid Dynamics &Amp; Materials Processing

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This study aims to analyze mixed convection in a square cavity with two moving vertical walls by finite volume method. The cavity filled with Non-Newtonian fluid of Bingham model is heated from below and cooled by the other walls. This study has been conducted for certain parameters of Reynolds number (Re=1-100), Richardson number (Ri=1-20), Prandtl number (Pr=1-500), and Bingham number has been studied from 0 to 10. The results indicate that the increase in yield stress drops the heat transfer and the flow become flatter, while increasing Reynolds number augments it. The convective transport is dominant when increasing Richardson number which leads to enhance heat transfer in the cavity for both Newtonian and Non-Newtonian fluid. A correlation of Nusselt number is given in function of different parameters.

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Section: Introductionmentioning

confidence: 99%

Mixed Convection of Bingham Fluid in a Two Sided Lid-Driven Cavity Heated From Below

Benmalek

Souidi

Moderres

et al. 2019

Fluid Dynamics &Amp; Materials Processing

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“…Their results show that for Re ¼ 400, the splitter plate causes an increase in near-wake length, a decrease in near-wake maximum width, a secondary vortex formation and a decrease of the maximum velocity in the recirculating zone, while for Re ¼ 200, the near-wake keeps its symmetry and vortex shedding is inhibited. Nalluri et al [27] solved numerically the coupled momentum and energy equations for buoyancy-assisted mixed convection from an isothermal hemisphere in Bingham plastic fluids and reported results for streamline and isotherm contours, local and mean Nusselt number as a function of the Reynolds, Prandtl, Richardson and Bingham numbers. Bhinder et al [28] studied numerically the wake dynamics and forced convective heat transfer past an unconfined semicircular cylinder at incidence using air as the working fluid for Reynolds numbers in the range of 80 ≤ Re ≤ 180 and angles of incidence in the range of 0 o ≤ α ≤ 180 o .…”

Section: Introductionmentioning

confidence: 99%

Unsteady Mixed Convection from Two Isothermal Semicircular Cylinders in Tandem Arrangement

Salcedo¹,

Treviño²,

Cajas³

et al. 2017

Heat Exchangers - Design, Experiment and Simulation

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In this chapter, two-dimensional mixed convection heat transfer in a laminar cross-flow from two heated isothermal semicircular cylinders in tandem arrangement with their curved surfaces facing the oncoming flow and confined in a channel is studied numerically. The governing equations are solved using the control-volume method on a nonuniform orthogonal Cartesian grid. Using the immersed-boundary method for fixed Reynolds number of Re D ¼ u D D=υ ¼ 200, Prandtl number of Pr ¼ 7, blockage ratio of BR ¼ D=H ¼ 0:2 and nondimensional pitch ratio of σ ¼ L=D ¼ 3, the influence of buoyancy and the confinement effect are studied for Richardson numbers in the range −1 ≤ Ri ≤ 1. Here, u D is the average longitudinal velocity based on the diameter of the semicylinder. The variation of the mean and instantaneous nondimensional velocity, vorticity and temperature distributions with Richardson number is presented along with the nondimensional oscillation frequencies (Strouhal numbers) and phase-space portraits of flow oscillation from each semicylinder. In addition, local and averaged Nusselt numbers over the surface of the semicylinders are also obtained. The results presented herein demonstrate how the buoyancy and wall confinement affect the wake structure, vortex dynamics and heat transfer characteristics.

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Study on Laminar Natural Convection Heat Transfer from a Hemisphere with Uniform Heat Flux Surface

Zhang

Liu

2019

J. Therm. Sci.

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Mixed convection from a hemisphere in Bingham plastic fluids

Cited by 13 publications

References 36 publications

Mixed Convection of Bingham Fluid in a Two Sided Lid-Driven Cavity Heated From Below

Mixed Convection of Bingham Fluid in a Two Sided Lid-Driven Cavity Heated From Below

Unsteady Mixed Convection from Two Isothermal Semicircular Cylinders in Tandem Arrangement

Study on Laminar Natural Convection Heat Transfer from a Hemisphere with Uniform Heat Flux Surface

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