Mixed convection heat transfer from a spheroid to a Newtonian fluid

Sreenivasulu, B.; Srinivas, B.

doi:10.1016/j.ijthermalsci.2014.08.002

Cited by 19 publications

(7 citation statements)

References 22 publications

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“…The latter problem has been considered in numerous papers based on the numerical solutions to momentum and heat transfer equations in the ambient fluid (gas) in the ellipsoidal coordinate system. The analysis of [52,53,54,55,56] was based on the assumption that the body surface was fixed. Juncu [57] 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 infinitely high).…”

Section: Hydrodynamic Models (Mono-component Droplet Heating and Evapmentioning

confidence: 99%

Droplets and Sprays

Basu¹,

Ágarwal²,

Mukhopadhyay³

et al. 2018

Energy, Environment, and Sustainability

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Section: Hydrodynamic Models (Mono-component Droplet Heating and Evapmentioning

confidence: 99%

Droplets and Sprays

Basu¹,

Ágarwal²,

Mukhopadhyay³

et al. 2018

Energy, Environment, and Sustainability

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“…A good number of works have been reported earlier with cylinders [2,3] and spheres [4][5][6][7][8][9] as immersed objects. An examination of literature revealed that previous works pertaining to spheroids are focused on transport properties in case of Newtonian fluids [10][11][12][13], power law fluids [14][15][16] and tandem spheroids in Newtonian fluids [17][18][19] whereas studies on tandem spheroids in power law fluids is scarce [20].…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer from Two Spheroids in Tandem to a Power Law Fluid by Forced and Mixed Convection Modes

Sreenivasulu¹,

Sree²,

Srinivas³

et al. 2020

TI-IJES

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A numerical study is carried out on convective heat transfer from an unconfined and stationary tandem of two spheroids to the surrounding flowing power law fluid of constant physical properties. Two modes of convection viz., forced convection and mixed convection are considered for the present study. The surface of both the spheroids is maintained at constant temperature. The focus of the investigation is to obtain the effect of pertinent variables (Reynolds number, Prandtl number, Richardson number, aspect ratio, power law index and space between two spheroids) on the average Nusselt number. Reynolds number is taken as 1, 25, 50 and 100. Prandtl number considered is 1 and 100. Chosen range is 0.5 to 2.0 for power law index. Spacings taken are 4a and 8a (here 2a is the length of spheroid in direction parallel to flow). The study is also repeated for the case of mixed convection where in Richardson number is taken as 0.5, 12, 1.5 and 2.0.

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“…Mixed convection in finite channels occurred in numerous applications, such as solar systems [8], conventional flat plate collectors [9], and heat exchangers [10]. These studies used theoretical analysis [11], experiments [12] and calculations [13][14][15] to assess the effects of the Reynolds and Richardson numbers on the convection and heat transfer in terms of their respective assistance or opposition buoyancy and in consideration of cases that exhibited heating with high temperature or heat fluxes.…”

Section: Introductionmentioning

confidence: 99%

Energy conservation and heat transfer enhancement for mixed convection on the vertical galvanizing furnace

Mercola

Zhu

et al. 2020

THERM SCI

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The alloying temperature is an important parameter that affects the properties of galvanized products. The objective of this study is to explore the mechanism of conjugate mixed convection in the vertical galvanizing furnace and propose a novel energy conservation method to improve the soaking zone temperature based on the flow pattern and heat transfer characteristics. Herein, the present study applied the k-ε two-equation turbulence model to enclose the Navier-Stokes fluid dynamic and energy conservation equations, and the temperature distributions of the steel plate and air-flow field in the furnace were obtained for six Richardson numbers between 1.91 ⋅ 10 5 and 6.30 ⋅ 10 5. In the industrial practice, the side baffles were installed at the lateral opening of the cooling tower to alter the height of vertical flow passage, which affected the Richardson number. The results indicate that the Richardson number of 2.4 ⋅ 10 5 generated the highest heat absorption and maximal temperature in the steel plate due to the balance between natural and forced convection. Furthermore, the results of the on-line experiments validated the simulation research. The method enhanced the steel plate temperature in the soaking zone without increasing the heat power, thereby characterizing it as energy conservation technology.

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Mixed convection heat transfer from a spheroid to a Newtonian fluid

Cited by 19 publications

References 22 publications

Droplets and Sprays

Droplets and Sprays

Heat Transfer from Two Spheroids in Tandem to a Power Law Fluid by Forced and Mixed Convection Modes

Energy conservation and heat transfer enhancement for mixed convection on the vertical galvanizing furnace

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