Assesment of Thermodynamic Irreversibility in a Micro-Scale Viscous Dissipative Circular Couette Flow

Mondal, Pranab Kumar

doi:10.3390/e20010050

Cited by 11 publications

(4 citation statements)

References 31 publications

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“…All fluid flow and heat transfer processes follow three basic conservation laws, including mass conservation, momentum conservation, and energy conservation laws. They are collectively referred to as the Navier–Stokes equation [ 19 , 20 , 21 ].…”

Section: Numerical Simulationmentioning

confidence: 99%

Design and Analysis of the IGBT Heat Dissipation Structure Based on Computational Continuum Mechanics

Lin

Liu

et al. 2020

Entropy

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With the trend of high integration and high power of insulated gate bipolar transistor (IGBT) components, strict requirements have been placed on the heat dissipation capabilities of the IGBT devices. On the basis of traditional rectangular fins, this paper developed two new types of heat-dissipating fins to meet the high requirements of heat dissipation for the IGBT devices. One is the rectangular radiator with a groove length of 2.5 mm and a width of 0.85 mm, the other is the arc radiator with the angle of 125 arc angle, 0.8 mm arc height, and 1.4 mm circle radius. After theoretically calculating the IGBT junction temperature, numerical simulations have been implemented to verify the theoretical result. The commercial CFD software, STAR-CCM+, was employed to simulate the heat dissipation characteristics of the IGBT module under different wind speeds, power, and fin structures. By analyzing the temperature field and vector field of the IGBT module, the analysis results demonstrate that the error between the simulation result and the theoretical calculation is within 5%, which proves the feasibility of the newly designed heat-dissipating fins. When the wind speed is 12.5 m/s, the power is 110 W, the fin height is 31.2 mm, and the fin thickness is 2.3 mm, the rectangular radiator can achieve the best heat dissipation performance.

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Section: Numerical Simulationmentioning

confidence: 99%

Design and Analysis of the IGBT Heat Dissipation Structure Based on Computational Continuum Mechanics

Lin

Liu

et al. 2020

Entropy

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“…The maximum exergetic efficiency can be attained corresponding to this optimum design. The dimensionless number used to express this optimum design is the Bejan number (Be) and is given as the ratio of S gen,HT to S gen,total [35].…”

Section: At the Outlet (Z = L)mentioning

confidence: 99%

Circular Microchannel Heat Sink Optimization Using Entropy Generation Minimization Method

Kumar

Bharj

2020

Journal of Non-Equilibrium Thermodynamics

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The performance of the microchannel heat sink (MCHS) in electronic applications needs to be optimized corresponding to the number of channels (N). In this study optimization of the number of channels corresponding to the diameter of the microchannel ({D_{N}}) using an entropy generation minimization approach is achieved for the MCHS used in electronic applications. The numerical study is performed for constant total heat flow rate ({\dot{q}_{tot}}) and total mass flow rate ({\dot{m}_{tot}}). The results indicate that the dominance of frictional entropy generation ({S_{gen,Fr}}) increases with the reduction in diameter. However, the entropy generation due to heat transfer ({S_{gen,HT}}) decreases with the reduction in diameter. Therefore, the optimum diameter ({D^{\ast }}) is calculated corresponding to the minimum total entropy generation ({S_{gen,total}}) for the optimum number of channels ({N^{\ast }}). Furthermore, the entropy generation number ({N_{S}}) and Bejan number (Be) are also calculated.

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“…This special issue consists of nine articles that report on investigations dealing with heat and mass transfer and thermodynamic analysis of thermofluidic systems [ 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ]. Most of these investigations are analytic or numerical [ 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ]. Two of the investigations include experiments [ 36 , 39 ].…”

Section: The 9 Contributions Published In This Special Issuementioning

confidence: 99%

“…The main theme of four articles in this special issue is optimization of microchannels from both energetic and entropic perspectives [ 34 , 36 , 39 , 40 ]. Other areas that have been explored include the analysis and optimization of microreactors [ 33 ], simulation and thermal analysis of micro circular Couette flow [ 37 ], and thermodynamic analysis of various-shaped micro-scale thermoelectric coolers [ 38 ]. Moreover, an interesting concept named virtual entropy generation method has been elaborated by Zhang et al [ 35 ], which provides a path for the evaluation of leakage in channels using the concept of entropy generation.…”

Section: The 9 Contributions Published In This Special Issuementioning

confidence: 99%

Non-Equilibrium Thermodynamics of Micro Technologies

Torabi

Karimi

Ghiaasiaan

2019

Entropy

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Assesment of Thermodynamic Irreversibility in a Micro-Scale Viscous Dissipative Circular Couette Flow

Cited by 11 publications

References 31 publications

Design and Analysis of the IGBT Heat Dissipation Structure Based on Computational Continuum Mechanics

Design and Analysis of the IGBT Heat Dissipation Structure Based on Computational Continuum Mechanics

Circular Microchannel Heat Sink Optimization Using Entropy Generation Minimization Method

Non-Equilibrium Thermodynamics of Micro Technologies

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