An entropy production analysis for electroosmotic flow and convective heat transfer: a numerical investigation

2021 ◽  
Author(s):  
Soroush Najjaran ◽  
Saman Rashidi ◽  
Mohammad Sadegh Valipour
Keyword(s):  
Heat Transfer ◽  
Convective Heat Transfer ◽  
Entropy Production ◽  
Numerical Investigation ◽  
Convective Heat ◽  
Electroosmotic Flow ◽  
Production Analysis

NUMERICAL INVESTIGATION ON CONVECTIVE HEAT TRANSFER OF SUPERCRITICAL PRESSURE CO2 IN SERPENTINE CHANNEL

2018 ◽  
Author(s):  
Xinying Cui ◽  
Jiangfeng Guo ◽  
Xiulan L. Huai ◽  
Keyong Cheng ◽  
Haiyan Zhang ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Convective Heat Transfer ◽  
Numerical Investigation ◽  
Convective Heat ◽  
Supercritical Pressure ◽  
Serpentine Channel

Numerical Investigation of Convective Heat Transfer on a Dynamic Wall Heat Exchanger With Varying Amplitude and Frequency

2021 ◽  
Author(s):  
M. Habibur Rahman ◽  
Emdadul Haque Chowdhury ◽  
Didarul Ahasan Redwan ◽  
Hasib A. Prince ◽  
M. Ruhul Amin
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Convective Heat Transfer ◽  
Numerical Investigation ◽  
Convective Heat

scholarly journals Effect of corrugated minichannel variable width on entropy generation for convective heat transfer of alpha-Alumina-water nanofluid

2021 ◽  
Vol 2053 (1) ◽  
pp. 012016
Author(s):  
N M Muhammad ◽  
N A C Sidik ◽  
A Saat ◽  
Y Asako ◽  
W M A A Japar ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Convective Heat Transfer ◽  
Entropy Production ◽  
Convective Heat ◽  
Entropy Generation ◽  
Entropy Generation Rate ◽  
Thermal Systems ◽  
Volume Fractions ◽  
Thermal Entropy ◽  
Alpha Alumina

Abstract Energy management and sustainability in thermal systems require maximum utilization of resources with minimal losses. However, it is rarely unattainable due to the ever-increasing need for a high-performance system combined with device size reduction. The numerical study examined convective heat transfer of an alpha-Alumina-water nanofluid in variable-width corrugated minichannel heat sinks. The objective is to study the impact of nanoparticle volume fractions and flow area variation on the entropy generation rate. The determining variables are 0.005 – 0.02 volume fractions, the fluid velocity 3 – 5.5 m/s and heat flux of 85 W/cm2. The numerical results show an acceptable correlation with the experiment results. The results indicate the thermal entropy production drop with an increase in nanoparticles volume fraction. Contrastingly, the frictional resistance entropy suggests the opposite trend due to the turbulence effect on the fluid viscosity. The induction of Alumina-Water nanofluid with enhanced thermal conductivity declined the entropy generation rate compared to water alone. The increase in width ratio by 16% between the cases translates to at least a 9% increase in thermal entropy production. The outcome of this study can provide designers and operators of thermal systems more insight into entropy management in corrugated heatsinks.

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