Numerical simulation of heat transfer enhancement in wavy microchannel heat sink

Abstract In this paper, heat transfer and water flow characteristics in wavy microchannel heat sink (WMCHS) with rectangular cross-section with various wavy amplitudes ranged from 125 to 500 μm is numerically investigated. This investigation covers Reynolds number in the range of 100 to 1000. The three-dimensional steady, laminar flow and heat transfer governing equations are solved using the finite-volume method (FVM). The water flow field and heat transfer phenomena inside the heated wavy microchannels is simulated and the results are compared with the straight microchannels. The effect of using a wavy flow channel on the MCHS thermal performance, the pressure drop, the friction factor, and wall shear stress is reported in this article. It is found that the heat transfer performance of the wavy microchannels is much better than the straight microchannels with the same cross-section. The pressure drop penalty of the wavy microchannels is much smaller than the heat transfer enhancement achievement. Both friction factor and wall shear stress are increased proportionally as the amplitude of wavy microchannels increased.

[1]  D. B. Spalding,et al.  Prediction of laminar flow and heat transfer in helically coiled pipes , 1974, Journal of Fluid Mechanics.

[2]  Kyoji Yamamoto,et al.  Visualization of the flow in a helical pipe , 2002 .

[3]  C. Y. Wang,et al.  On the low-Reynolds-number flow in a helical pipe , 1981, Journal of Fluid Mechanics.

[4]  Wu-Shung Fu,et al.  Heat transfer induced by a body moving in opposition to a flowing fluid , 2001 .

[5]  R. Pease,et al.  High-performance heat sinking for VLSI , 1981, IEEE Electron Device Letters.

[6]  Kyoji Yamamoto,et al.  Flow through a rotating helical pipe with circular cross-section , 2000 .

[7]  Steffen Hardt,et al.  Simulation of helical flows in microchannels , 2004 .

[8]  M. M. Rahman,et al.  Analysis of Conjugate Heat Transfer in Microchannel Heat Sinks , 2000 .

[9]  Huajun Chen,et al.  Fluid flow and mixed convection heat transfer in a rotating curved pipe , 2003 .

[10]  Jing-zhou Zhang,et al.  The study of flow characteristics of curved microchannel , 2005 .

[11]  J. Anderson,et al.  Computational fluid dynamics : the basics with applications , 1995 .

[12]  C. Shu,et al.  Fluid flow and heat transfer in wavy microchannels , 2010 .

[13]  Rainer Friedrich,et al.  Influence of curvature and torsion on turbulent flow in helically coiled pipes , 2000 .

[14]  P. Gillard,et al.  Influence of interface conditions on laser diode ignition of pyrotechnic mixtures: application to the design of an ignition device , 2003 .

[15]  J. Masliyah,et al.  Fully developed viscous flow and heat transfer in curved semicircular sectors , 1979 .

[16]  Huiying Wu,et al.  Friction factors in smooth trapezoidal silicon microchannels with different aspect ratios , 2003 .

[17]  Kyoji Yamamoto,et al.  Experimental study of the flow in a helical circular tube , 1995 .

[18]  M. A. Ebadian,et al.  Laminar forced convection in a helicoidal pipe with finite pitch , 1995 .

[19]  R. Friedrich,et al.  Direct numerical simulation of turbulent flows in curved and helically coiled pipes , 2001 .

[20]  J. D. Seader,et al.  Heat and mass transfer phenomena for viscous flow in curved circular tubes , 1972 .

[21]  Stéphane Colin,et al.  Heat Transfer and Fluid Flow in Minichannels and Microchannels , 2005 .

[22]  S. Patankar.  Numerical Heat Transfer and Fluid Flow , 2018, Lecture Notes in Mechanical Engineering.

[23]  Reiyu Chein,et al.  Numerical study of the inlet/outlet arrangement effect on microchannel heat sink performance , 2009 .

[24]  Hsueh-Chia Chang,et al.  Analysis of heat transfer enhancement in coiled-tube heat exchangers , 2001 .

[25]  Kyoji Yamamoto,et al.  Stability of the flow in a helical tube , 1998 .

[26]  Tianliang Yang,et al.  Bifurcation and stability of forced convection in curved ducts of square cross-section , 2004 .

[27]  Rahman Saidur,et al.  The effect of geometrical parameters on heat transfer characteristics of microchannels heat sink with different shapes , 2010 .

[28]  Bengt Sundén,et al.  Numerical analysis of a primary surface trapezoidal cross wavy duct , 2000 .

[29]  Steffen Hardt,et al.  Helical Flows and Chaotic Mixing in Curved Micro Channels , 2004 .