THERMAL SCIENCE
International Scientific Journal
Thermal Science - Online First
online first only
Numerical investigation of heat transfer performance in parallel and symmetric wavy microchannel heat sinks
ABSTRACT
Microchannel heat sinks have advantages such as a high surface area-to-volume ratio, a large heat transfer coefficient, and lightweight design, making them crucial for microelectronics and aerospace applications. Numerical simulation was conducted to analyze the fluid flow and heat transfer characteristics in the newly designed heat sink at Reynolds number ranging from 147 to 736.The symmetric wavy microchannel heat sinks were compared with the parallel wavy microchannel heat sinks based on friction coefficient, Nusselt number, and comprehensive performance factor. The results indicate that periodic variation in the cross-sectional area of the symmetric wavy microchannels generates vortices at the valleys, enhancing fluid mixing. In contrast, the fluid in the parallel wavy microchannels exhibits a wave-type flow pattern, where the wavy structure disrupts the flow boundary layer. The fluid flows along the streamlined boundary with less flow friction. This enables heat transfer enhancement under lower pressure drop conditions. The geometrical parameters for optimal heat transfer performance are obtained by adjusting the amplitude ratio(α). The comprehensive performance factor for the parallel wavy microchannels, with a Reynolds number of 736 and a value of α = 4, is 1.64.
KEYWORDS
PAPER SUBMITTED: 2024-12-06
PAPER REVISED: 2025-06-11
PAPER ACCEPTED: 2025-06-28
PUBLISHED ONLINE: 2025-08-02
- Tuckerman, D. B., Pease, R. F.W., High-Performance Heat Sinking for VLSI, IEEE Electron Device Letters, 2(1981), 5, pp. 126-129
- Wang, X. D., et al., Optimal Geometric Structure for Nanofluid-Cooled Microchannel Heat Sink Under Various Constraint Conditions, Energy Conversion and Management, 65(2013), pp. 528-538
- Leng, C., et al., An Improved Design of Double-Layered Microchannel Heat Sink with Truncated Top Channels, Applied Thermal Engineering, 79(2015), pp. 54-62
- Shang, X. S., et al., Mathematical Modeling and Multi-Objective Optimization on The Rectangular Micro-Channel Heat Sink, International Journal of Thermal Sciences, 184(2023), pp. 107926
- Kumar, K., Kumar, P., Effect of Groove Depth on Hydrothermal Characteristics of The Rectangu-lar Microchannel Heat Sink, International Journal of Thermal Sciences, 161(2021), pp. 106730
- Zhu, Q. F., et al., Local Hydrothermal Characteristics and Temperature Uniformity Improvement of Microchannel Heat Sink with Non-Uniformly Distributed Grooves, Case Studies in Thermal Engineering, 47(2023), pp. 103113
- Soo, Y., H., et al., Heat transfer enhancement of staggered water-droplet grooved microchannel heat sink using Al2O3 nanofluid. Thermal Science, 28(2024), 3 Part B, pp. 2477-2490
- Bhandari P., et al. Design modifications in micro pin fin configuration of microchannel heat sink for single phase liquid flow: A review. Journal of Energy Storage, 66(2023), 107548
- Bhandari P., Prajapati Y K. Influences of tip clearance on flow and heat transfer characterstics of open type micro pin fin heat sink. International Journal of Thermal Sciences, 179(2022), 107714
- Bhandari P, Prajapati Y K. Thermal performance of open microchannel heat sink with variable pin fin height. International journal of thermal sciences, 159(2021), 106609
- Wang, R. J., et al., Parameterization Investigation on The Microchannel Heat Sink with Slant Rec-tangular Ribs by Numerical Simulation, Applied Thermal Engineering, 133(2018), pp. 428-438
- Khoshvaght-Aliabadi, M. et al., Performance Enhancement of Straight and Wavy Miniature Heat Sinks Using Pin-Fin Interruptions and Nanofluids, Chemical Engineering and Processing: Process Intensification, 122(2017), pp. 90-108
- Venkiteswaran, V. K., et al., Comparative study of heat and fluid flow characteristics of parallel and offset strip fin micro-channels using CFD simulations. Thermal Science,22 (2018), 5, pp. 1973-1985
- Li, H., et al., Optimal Design of Microchannel Heat Sink with Staggered Fan-Shaped Cavities and Ribs, Journal of Thermophysics and Heat Transfer, 38(2024), 2, pp. 145-158
- Wang, C.L., et al. Enhanced heat transfer study of microchannel heat sink with periodically ar-ranged triangular cavities and arc‐shaped ribs. Heat Transfer, 53(2024), 5, pp. 2438-2459
- Datta, A., et al., A Conjugate Heat Transfer Analysis of Performance for Rectangular Microchannel with Trapezoidal Cavities and Ribs, International Journal of Thermal Sciences, 138(2019), pp. 425-446
- Zhu, Q. F., et al., Numerical Simulation Study of Thermal and Hydraulic Characteristics of Lami-nar Flow in Microchannel Heat Sink with Water Droplet Cavities and Different Rib Columns, In-ternational Journal of Thermal Sciences, 172(2022), pp. 107319
- Jiang, M. X., Pan, Z. L., Optimization of micro-channel heat sink based on genetic algorithm and back propagation neural network. Thermal Science, 27(2023), 1 Part A, pp. 179-193
- Sui, Y., et al., Fluid Flow and Heat Transfer in Wavy Microchannels, International Journal of Heat and Mass Transfer, 53(2010), pp. 2760-2772
- Sui, Y., et al., Direct Numerical Simulation of Fluid Flow and Heat Transfer in Periodic Wavy Channels with Rectangular Cross-Sections, International Journal of Heat and Mass Transfer, 55(2012), 1-3, pp. 73-88
- Sui, Y., et al., An Experimental Study of Flow Friction and Heat Transfer in Wavy Microchannels with Rectangular Cross Section, International journal of thermal sciences, 50(2011), 12, pp. 2473-2482
- Xie, G. N., et al., Constructal Theory Based Geometric Optimization of Wavy Channels in The Low Reynolds Number Regime, Journal of Electronic Packaging, 136(2014), 3, pp. 031013
- Zhou, J. D., et al., Design of Microchannel Heat Sink with Wavy Channel and Its Time-Efficient Optimization with Combined RSM and FVM Methods, International Journal of Heat and Mass Transfer, 103(2016), pp. 715-724
- Ali, A. Y. M., et al., Thermal Analysis of High Concentrator Photovoltaic Module Using Conver-gent-Divergent Microchannel Heat Sink Design, Applied Thermal Engineering, 183(2021), pp. 116201
- Wang, X. W., et al., Study on The Flow and Heat Transfer Characteristics of Sinusoidal Half-Corrugated Microchannels, Journal of Thermophysics and Heat Transfer, 34(2020), 2, pp. 314-321
- Fang, Y. Q., et al., Numerical study on heat and flow transfer characteristics in rectangular mini-channel with S-shaped turbulator inserted. Thermal science, 27(2023), 4 Part A, pp. 2865-2877
- Steinke, M. E., Kandlikar, S. G., Single-Phase Liquid Friction Factors in Microchannels, Interna-tional journal of thermal sciences, 45(2006), 11, pp. 1073-1083
- Phillips, R. J., Microchannel Heat Sinks, The Lincoln Laboratory Journal, 1(1988), 1, pp. 31-48
- Liu., W., et al., Physical Quantity Synergy in Laminar Flow Field and Its Application in Heat Transfer Enhancement, International Journal of Heat and Mass Transfer, 52(2009), 19-20, pp. 4669-4672
- Bhandari P., et al. A review on design alteration in microchannel heat sink for augmented thermo-hydraulic performance. Ain Shams Engineering Journal, 15(2024), (2): 102417