Momentum and heat transfer phenomena of spheroid particles at moderate Reynolds and Prandtl numbers

Kishore, Nanda; Gu, Sai

doi:10.1016/j.ijheatmasstransfer.2011.02.001

Cited by 88 publications

(48 citation statements)

References 37 publications

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“…The results are found to be in excellent agreement with literature values [20,21]. Therefore, based on our previous experience [4,5] and the present comparison, the results are considered to be reliable and accurate within ± 3-4 %. for different values of the Prandtl number.…”

Section: Validationsupporting

confidence: 90%

“…The detailed numerical procedure to obtain steady-state velocity, pressure, and temperature fields has been presented elsewhere [4,5]; hence, here only salient features are recapitulated. The semi-implicit method for pressure-linked equations (SIMPLE) together with the first-order upwind scheme for convective terms has been chosen.…”

Section: Numerical Methodology and Grid Independence Studymentioning

confidence: 99%

“…However, in the case of confined spheroid particles, the available literature on drag and heat transfer phenomena is rather scarce. The literature pertaining to the flow and heat/mass transfer phenomena of unconfined and confined spheroid particles have been thoroughly revised in our recent works [4,5] and elsewhere [6][7][8][9][10][11][12][13][14][15][16][17][18]. Delgado [19] analytically obtained the rate of mass transfer from prolate spheroids buried in granular beds of small inert particles to a Newtonian fluid for the two extreme cases of pure diffusion regime and high Peclet number regime.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Blockage on Heat Transfer Phenomena of Spheroid Particles at Moderate Reynolds and Prandtl Numbers

Kishore

2011

Chem. Eng. Technol.

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Effects of the confining wall or blockage on the heat transfer phenomena of spheroid particles were numerically investigated. The heated spheroid particles were maintained at constant temperature and allowed to sediment in cylindrical tubes filled with Newtonian liquids. In this flow configuration, the heat transfer took place from the heated spheroid particles to the surrounding Newtonian liquid. The governing conservation equations of the mass, momentum, and energy together with appropriate boundary conditions were numerically solved using commercial software based on computational fluid dynamics. A simple correlation for the average Nusselt number of the confined spheroid particles was developed which can be applied in new applications

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Section: Validationsupporting

confidence: 90%

Section: Numerical Methodology and Grid Independence Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Blockage on Heat Transfer Phenomena of Spheroid Particles at Moderate Reynolds and Prandtl Numbers

Kishore

2011

Chem. Eng. Technol.

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“…Equation (44) is identical to Equation (10). This equation is the same as given in [4] if c in the latter paper is replaced with c pv .…”

Section: Appendix 1 Energy Equation With Inter-diffusional Termsmentioning

confidence: 98%

“…The latter problem has been considered in numerous papers based on the numerical solutions to the momentum and heat transfer equations in the ambient gas in the ellipsoidal coordinate system. The analyses of [8,9,10,11,12] were based on the assumption that the body surface temperature was fixed. Juncu [13] took into account changes in body temperature with time, while assuming that there is no temperature gradient inside the body (the thermal conductivity of the body was assumed to be infinitely high).…”

Section: Introductionmentioning

confidence: 99%

Mathematical modelling of heating and evaporation of a spheroidal droplet

Zubkov

Cossali

Tonini

et al. 2017

International Journal of Heat and Mass Transfer

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Most of the currently used models for droplet heating and evaporation are based on the assumption that droplets are perfect spheres. At the same time the shapes of many observed droplets in engineering applications are far from spherical. We have studied the influence of droplet non-sphericity on their heating and evaporation, approximating droplet shapes as prolate and oblate spheroids. The previously developed exact solutions to the heat and mass transfer equations for the gas phase surrounding a spheroidal droplet have been used as boundary conditions for the solutions to these equations in the liquid phase. The temperature gradients inside and at the surface of the droplets, and the changes in their shape during the heating and evaporation process have been taken into account. The effects of surface tension and droplet motion on droplet heating and evaporation are ignored. The results are applied to the analysis of heating and evaporation of an n-dodecane fuel droplet in Diesel engine-like conditions. The effect of droplet nonsphericity is shown to be relatively small for the evaporation time of these droplets with initial eccentricities 2/3 ≤ ǫ ≤ 1.5.

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Heating of Non-evaporating Droplets

Sazhin

2014

Droplets and Sprays

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Momentum and heat transfer phenomena of spheroid particles at moderate Reynolds and Prandtl numbers

Cited by 88 publications

References 37 publications

Effect of Blockage on Heat Transfer Phenomena of Spheroid Particles at Moderate Reynolds and Prandtl Numbers

Effect of Blockage on Heat Transfer Phenomena of Spheroid Particles at Moderate Reynolds and Prandtl Numbers

Mathematical modelling of heating and evaporation of a spheroidal droplet

Heating of Non-evaporating Droplets

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