Numerical Studies on Natural Convection in a Trapezoidal Enclosure With Discrete Heating

Gowda, Krishne Gowda B. Mote; Rajagopal, M.S.; Aswatha,; Seethramu, Kankanhalli N.

doi:10.1080/01457632.2018.1546948

Cited by 10 publications

(2 citation statements)

References 28 publications

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“…Their study focused on heat transfer by natural convection within the enclosure and the resulting generation of entropy. Mote Gowda et al [10] explored free convection within a trapezoidal-shaped enclosure featuring discrete heating. Reddy et al [11] studied extensively the heat transfer phenomenon by natural convection originating from a heated cylinder positioned within a square-shaped cavity containing micro-polar fluid.…”

Section: Introductionmentioning

confidence: 99%

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2024

J. Eng. Adv.

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The effects of cavity shape by inclination angle on laminar natural convection inside trapezoidal and square-shaped cavities have been numerically investigated in this work. Several simulations had been conducted for various inclinations of the trapezoidal cavity at Rayleigh numbers (Ra) =10 5 to 10 6 in a laminar flow regime. The walls at the left and right sides of the cavities were heated isothermally, while the walls at the top and bottom sides were adiabatic. The problem was assumed to be 2-D and solved using the software package ANSYS Fluent 16.2. Cavity filled with air is examined in two distinct instances; varying boundary layers and the flow generated for the natural convection. This numerical study analyzed the flow characteristics, temperature distribution, and Nusselt number. The analysis reveals that as the Rayleigh number increases, the Nusselt number also increases, with a more pronounced effect at higher Rayleigh numbers. It has been observed that there is a substantial effect of cavity shapes on the Nusselt number. The presence of an angled wall inhibits convection resulting in stronger flow in the squared cavity compared to the trapezoidal cavity. From numerical results, it is also found that the temperature distribution at Ra = 10 5 is wider than the temperature distribution at Ra= 10 6 .

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Section: Introductionmentioning

confidence: 99%

Untitled

2024

J. Eng. Adv.

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“…In several industrial applications, the physical representation may not be regularly shaped, where the flow rate could be significantly controlled by various geometrical parameters arising in non-regular enclosures. The effect of geometrical shape subjected to various boundary conditions has been numerically analyzed under different constraints [33][34][35][36][37][38][39][40][41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Impact of thermal and solute source-sink combination on thermosolutal convection in a partially active porous annulus

Kemparaju¹,

Swamy

Sankar³

et al. 2022

Phys. Scr.

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The objective of the current paper is to investigate the thermosolutal flow along with heat and mass dissipation rates in an upright porous annular space subjected to discrete heating and salting along the vertical boundaries with insulated and impermeable horizontal boundaries. To solve the model equations, an implicit finite difference scheme with over relaxation technique has been implemented. The numerical predictions focus specifically on the effect of buoyancy ratio, Lewis number, Darcy number and source-sink arrangements on fluid flow behavior, thermal and solutal characteristics, average Nusselt and Sherwood numbers. The simulations were performed for an extensive range of dimensionless parameters (-10≤ N ≤ 10, 0.1 ≤ Le ≤ 1, 10-5 ≤ Da ≤ 10-1) by considering two different types of source-sink arrangements and found that the flow circulation strength is maximum with in-line arrangement of source and sink compared to alternative arrangement. Also, we found that in case-I, regardless of Lewis number, the maximum heat and mass dissipation rates takes place through top source during opposing flow, and through bottom source for aided flow. However, in case-II arrangement, irrespective to type of flow, the greater amount of heat and mass transport is found through the bottom source at the inner cylinder compared to top source placed at outer cylinder.

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