Bejan’s heatline analysis of natural convection in right-angled triangular enclosures: Effects of aspect-ratio and thermal boundary conditions

Kaluri, Ram Satish; Anandalakshmi, R.; Basak, Tanmay

doi:10.1016/j.ijthermalsci.2010.04.022

Cited by 54 publications

(20 citation statements)

References 45 publications

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“…Kaluri et al [7] performed a numerical study on heat distribution and thermal mixing for steady laminar natural convective flow within fluid-saturated porous square cavities by using heatline technique. Basak et al and Kaluri et al [8][9][10] performed several studies on heat transport field for various domains under different boundary conditions. Waheed [11] studied the problem of the natural laminar convection in square enclosures filled with fluidsaturated porous medium by using the heatfunction formulation approach.…”

Section: Introductionmentioning

confidence: 99%

Visualization of heat flow in a vertical channel with fully developed mixed convection

Çelik

Mobedi

2012

International Communications in Heat and Mass Transfer

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A study on visualization of heat flow in three channels with laminar fully developed mixed convection heat transfer is performed. The first channel is filled with completely pure fluid; the second one is completely filled with fluid saturated porous medium. A porous layer exists in the half of the third channel while another half is filled with pure fluid. The velocity, temperature and heat transport fields are obtained both by using analytical and numerical methods. Analytical expression for heat transport field is obtained and presented. The heatline patterns are plotted for different values of Gr/Re, thermal conductivity ratio, Peclet and Darcy numbers. It is found that the path of heat flow in the channel strongly depends on Peclet number. For low Peclet numbers (i.e., Pe = 0.01), the path of heat flow is independent of Gr/Re and Darcy numbers. However, for high Peclet numbers (i.e., Pe = 5), the ratio of Gr/Re, Darcy number and thermal conductivity ratio influence heatline patterns, considerably. For the channels with high Peclet number (i.e., Pe = 5), a downward heat flow is observed when a reverse flow exits.

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Section: Introductionmentioning

confidence: 99%

Visualization of heat flow in a vertical channel with fully developed mixed convection

Çelik

Mobedi

2012

International Communications in Heat and Mass Transfer

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“…Furthermore, Yesiloz and Aydin developed a correlation for an isosceles rightangled triangular cavity heated from below and cooled from the side wall observing an increase in Nusselt number with an increase in Rayleigh number [7]. Kaluri et al studied heat transfer in a rectangular enclosure insulated from base considering different boundary conditions and aspect ratios [8]. They found the highest heat flux for top angle of 15 o .…”

Section: Introductionmentioning

confidence: 99%

CFD Modeling of Natural Convection in Right-Angled Triangular Enclosures

Mirabedin¹

2016

IJHT

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Two-dimensional numerical simulations have been performed to study natural convection in right-angled triangular enclosures filled with water considering different aspect ratios. Continuity, momentum and energy equations are solved assuming Boussinesq approximation utilizing COMSOL. Effect of Rayleigh number, Ra, on heat transfer rate is investigated by showing Nusselt number, Nu, for a range from to . It is shown that increasing aspect ratio of the cavity increases averaged Nusselt number in a cavity heated from below. Finally, a correlation for heat transfer rate is developed considering the effect of aspect ratio using simulation results.

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“…Enhancement in heat transfer was observed for upper location of heat source and high aspect ratio for high Rayleigh number. Kaluri et al (2010) have analyzed natural convection in right-angled triangular enclosures with various top angles. It was observed that for lower angle (15 0 ), the average nusselt number remains invariant with increase in Ra, but the enhanced convection at higher Ra significantly affects the heat flow distribution.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Natural Convection in a Right-Angle Triangular Enclosure

Sen¹,

Triveni²,

Panua³

2014

Frontiers in Heat and Mass Transfer

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A numerical investigation has been performed for heat transfer analysis in a right-angled triangular enclosure filled with water. The side wall of the enclosure is maintained at high temperature compare to the base wall while hypotenuse is kept thermally insulated. Two -dimensional steady-state continuity, momentum and energy equations along with the boussinesq approximation are solved by finite volume method using commercial available software, FLUENT 6.3. The computational results are shown in terms of isotherms, streamlines and velocity contour for Rayleigh number (10 5 ≤ Ra ≤ 10 7 ). The heat transfer is presented in terms of local and average Nusselt number. The result encapsulates that both flow field and temperature distributions are affected with Rayleigh number. The simulated results are validated with the experimental and numerical results and it shows a good agreement with the published results. Finally, a correlation for Nusselt number (Nu) with Rayleigh number (Ra) has been developed for vertical hot wall.

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Bejan’s heatline analysis of natural convection in right-angled triangular enclosures: Effects of aspect-ratio and thermal boundary conditions

Cited by 54 publications

References 45 publications

Visualization of heat flow in a vertical channel with fully developed mixed convection

Visualization of heat flow in a vertical channel with fully developed mixed convection

CFD Modeling of Natural Convection in Right-Angled Triangular Enclosures

Numerical Analysis of Natural Convection in a Right-Angle Triangular Enclosure

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