Heat and mass transfer analysis of combined convection in a horizontal rectangle

Ambethkar, V.; Basumatary, Lakshmi Rani

doi:10.1002/htj.22140

Cited by 4 publications

(4 citation statements)

References 22 publications

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“…Hussain and Rahomy 29 have made a comparative study of free convection with different geometries of cylinders inside a square enclosure filled with nanofluid layers. Ambethkar and Basumatary 30 have investigated combined convection in horizontal rectangular enclosure. Singh and Kolasani 31 have studied both energy dissipation and Hall effect MHD convective flow within an asymmetric channel having both arbitrary wall thickness and conductance.…”

Section: Introductionmentioning

confidence: 99%

Insight into the dynamics of a Newtonian fluid through a rectangular domain with an emphasis on heat transfer

Ambethkar,

Basumatary

2023

Heat Trans

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Fluid flow coupled with temperature effects has attained prime importance due to its huge applications in different fields like casting and welding industries, geothermal extraction, and lubrication technologies. The present study is a novel numerical method for computations for fluid flow with temperature effects in a rectangular domain. A control volume method is employed as a numerical method for solving continuity, momentum, and energy equations. Owing to the difficulties associated with solving these governing equations, numerical computations are presented in the computational grid by using the control volume method. A modified algorithm is suggested for the current problem. The magnitude of the velocity, temperature, and pressure at different nodes in horizontal and vertical directions of the computational domain is investigated. Along the diagonal nodes, the pressure declines and then grows consistently. The temperature for mercury is higher than for water at a particular node.

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Section: Introductionmentioning

confidence: 99%

Insight into the dynamics of a Newtonian fluid through a rectangular domain with an emphasis on heat transfer

Ambethkar,

Basumatary

2023

Heat Trans

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“…Analysis of combined convection, heat and mass transfer in a rectangular enclosure with wall heat and concentration sources was investigated by Ambethkar and Basumatary [1,2,3]. Alam et al [4] have investigated natural convection in a rectangular enclosure due to partial heating and cooling at vertical walls.…”

Section: Introductionmentioning

confidence: 99%

Impact of the Nusselt and Rayleigh Numbers on Heat Transfer in Rectangular Enclosure

Ambethkar

2023

Int. J. of Appl. Math.

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In this study, effect of the Nusselt and Rayleigh numbers on heat transfer in rectangular enclosure is investigated. The governing equations along with the boundary conditions are non-dimensionalized and discretized. The average Nusselt numbers (N u) for fluids of water (P r = 7) and air (P r = 0.7) at different Rayleigh numbers (Ra) are calculated. Details of empirical correlations used for calculating the average Nusselt numbers (N u) for specific fluids are presented. Mode of heat transfer in rectangular enclosure for suitable Nusselt and Rayleigh number is determined. Different factors which induce heat transfer in the rectangular enclosure are investigated. For each of these factors, appropriate numerical data is derived and elucidated. The numerical values of N u are obtained as less than 1 at different Rayleigh numbers in Ra < 1708. It is determined that the average Nusselt numbers for water (P r = 7) and air (P r = 0.7) increases curved linearly. For different Rayleigh numbers in Ra > 1708, it is found that the average Nusselt numbers for water (P r = 7) and air (P r = 0.7) increases linearly. At Ra = 1708, the critical Rayleigh number, the fluid layer remains stable and hence quiescent. The transfer of heat from the top wall to the bottom wall within the enclosure is by conduction for liquid (water, P r = 7) and through conduction and radiation for gas (air, P r = 0.7).

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“…Also, the chemical reactions play a major in enriching the mass accumulation rate of the fluid in both cases. Apart from the above works, there are a few more works that have provided knowledge of research related to hydrogen–air mixtures such as Ambethkar and Basumatary 27 explored the heat and mass transfer effects on combined free and forced convection in the horizontal rectangle using empirical correlations. Murthy et al 28 performed a study on modeling and predicting the formation of NO x emission in a duel fuel liquefied petroleum gas (LPG)–diesel engine.…”

Section: Introductionmentioning

confidence: 99%

Optimization of flame stabilization methods in the premixed microcombustion of hydrogen–air mixture

Jha

Velidi

Emani³

2022

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The premixed combustion of a lean hydrogen–air mixture is analyzed in this study to examine various properties and flame stabilization. A two‐dimensional (2D) analysis of a microscale combustor is performed with various shapes of bluff bodies (e.g., circular and triangular). Nine bluff bodies are placed at the entrance of the microscale combustor and solved with 2D governing equations. The analysis is performed with the three velocities of 10, 20, and 30 m/s, but the equivalence ratio is fixed in all cases. The various characteristics of the microscale combustor are studied such as the temperature of the wall, difference in peak temperature, the mean velocity at the outlet, and temperature of the exhaust gases. Flame stabilization depends on various factors such as bluff body shape and size, and the velocity of the fuel–air mixture at the inlet and recirculation zone. In comparison to all bluff body cases, we observe that the wall blade bluff body is the most efficient (low exhaust gas temperature, large recirculation zone, low mean velocity at the outlet of the microcombustor, and high wall temperature) compared with all eight other bluff body cases. Combustion efficiency is directly proportional to the wall temperature, meaning that the microcombustor with wall blade bluff bodies is more efficient with a stabilized flame. The simulation results are compared with published data on an L/D ratio of 15.

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Heat and mass transfer analysis of combined convection in a horizontal rectangle

Cited by 4 publications

References 22 publications

Insight into the dynamics of a Newtonian fluid through a rectangular domain with an emphasis on heat transfer

Insight into the dynamics of a Newtonian fluid through a rectangular domain with an emphasis on heat transfer

Impact of the Nusselt and Rayleigh Numbers on Heat Transfer in Rectangular Enclosure

Optimization of flame stabilization methods in the premixed microcombustion of hydrogen–air mixture

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