Optimization of Nano Fluid Flow for Micro Channel Heat Sinks With Rectangular Cross-Section

2015 ◽  
Author(s):  
Sepideh Kavousi ◽  
Abbas Abbassi
Keyword(s):  
Fluid Flow ◽  
Thermal Performance ◽  
Heat Sink ◽  
Degrees Of Freedom ◽  
Rectangular Cross Section ◽  
Thermal Conductance ◽  
Micro Channel ◽  
Nano Fluid ◽  
Numerical Predictions ◽  
Simpler Algorithm

In this paper, three-dimensional Al2O3-water nano fluid flow and heat transfer is optimized numerically. A numerical FORTRAN code based on the finite volume method and SIMPLER algorithm is developed to solve the governing equations. The code is carefully validated by comparing numerical predictions with experimental data. Aspect ratio, number of channels in the heat sink and solid fraction factor are considered as degrees of freedom. The goal is to find out the best possible number of channels in the system, and geometry of each channel that maximizes the global thermal conductance. The results show that the geometric parameters have a strong effect on the performance of micro channel heat sink. Comparison of the results of water and Al2O3-water nano fluid demonstrated that water showed a better thermal performance than nano fluid which indicates that neither Re nor pressure drop along the channel are good parameters to compare the thermal performance of nano fluid and water.

Enhancement of Heat Transfer of Rectangular Saw Tooth Shaped Micro Channel Heat Sink with Water Nano Fluid/Aluminium Oxide

2015 ◽  
Vol 813-814 ◽  
pp. 685-689
Author(s):  
M. Vijay Anand Marimuthu ◽  
B. Venkatraman ◽  
S. Kandhasamy
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
Nusselt Number ◽  
Pressure Drop ◽  
Heat Sink ◽  
Micro Channel ◽  
Performance Curve ◽  
Theoretical Level ◽  
Enhancement Of Heat Transfer ◽  
Nano Fluid

This paper investigates the performance and characteristics of saw tooth shape micro channel in the theoretical level. If the conduct area of the nano fluid increases the heat transfer also increases. The performance curve has drawn Reynolds number against nusselt number, heat transfer co efficient. Pressure drop plays an important role in this device. If pressure drop is high the heat transfer increases. The result in this experiment shows clearly that the heat transfer is optimized.

Experimental and Numerical Study of Methanol-Water Mixture Single-Phase Heat Transfer in a Micro-Channel Heat Sink

2012 ◽  
Author(s):  
Chun K. Kwok ◽  
Matthew M. Asada ◽  
Jonathan R. Mita ◽  
Weilin Qu
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Heat Sink ◽  
Single Phase ◽  
Numerical Study ◽  
Pure Water ◽  
Molar Fraction ◽  
Water Mixture ◽  
Micro Channel ◽  
Numerical Predictions

This paper presents an experimental study of single-phase heat transfer characteristics of binary methanol-water mixtures in a micro-channel heat sink containing an array of 22 microchannels with 240μm × 630μm cross-section. Pure water, pure methanol, and five methanol-water mixtures with methanol molar fraction of 16%, 36%, 50%, 63% and 82% were tested. Key parametric trends were identified and discussed. The experimental study was complemented by a three-dimensional numerical simulation. Numerical predictions and experimental data are in good agreement with a mean absolute error (MAE) of 0.87%.

scholarly journals Influence of aspect ratio on the thermal performance of rectangular shaped micro channel heat sink using CFD code

2017 ◽  
Vol 56 (1) ◽  
pp. 43-54 ◽  
Author(s):  
D.R.S. Raghuraman ◽  
R. Thundil Karuppa Raj ◽  
P.K. Nagarajan ◽  
B.V.A. Rao
Keyword(s):  
Aspect Ratio ◽  
Thermal Performance ◽  
Heat Sink ◽  
Micro Channel
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