Simulation of Subcooled Flow Boiling in Manifold Microchannel Heat Sink

Abstract The manifold microchannel heat sink receives an increasing number of attention lately due to its high heat flux dissipation. Numerical investigation of boiling phenomena in manifold microchannel (MMC) heat sinks remains a challenge due to the complexity of fluid route and the limitation of numerical accuracy. In this study, a computational fluid dynamics (CFD) approach including subcooled two-phase flow boiling process and conjugate heat transfer effect is performed using a MMC unit cell model. Different from steady-state single phase prediction in MMC heat sink, this type of modeling allows for the transient simulation for two-phase interface evolution during the boiling process. A validation case is conducted to validate the heat transfer phenomenon among three phases. Besides, this model is used for the assessment of the manifold dimensions in terms of inlet and outlet widths at the mass flux of 1300 kg/m2·s. With different ratios of inlet-to-outlet area, the thermal resistances remain nearly stable.

Download Full-text

Experimental investigation of the effect of heat sink orientation on subcooled flow boiling performance in a rectangular microgap channel

International Journal of Heat and Mass Transfer ◽

10.1016/j.ijheatmasstransfer.2017.12.133 ◽

2018 ◽

Vol 120 ◽

pp. 1341-1357 ◽

Cited By ~ 8

Author(s):

R. Ajith Krishnan ◽

K.R. Balasubramanian ◽

S. Suresh

Keyword(s):

Experimental Investigation ◽

Heat Sink ◽

Flow Boiling ◽

Subcooled Flow Boiling ◽

Subcooled Flow

Download Full-text

Optimal design of subcooled triangular microchannel heat sink exchangers with variable heat loads for high performance cooling

Journal of Physics Conference Series ◽

10.1088/1742-6596/2116/1/012052 ◽

2021 ◽

Vol 2116 (1) ◽

pp. 012052

Author(s):

David Olugbenga Ariyo ◽

Tunde Bello-Ochende

Keyword(s):

Heat Sink ◽

High Performance ◽

Flow Boiling ◽

High Heat ◽

Geometric Optimization ◽

Heat Fluxes ◽

Heat Sinks ◽

Subcooled Flow Boiling ◽

Subcooled Flow ◽

Microchannel Heat Sinks

Abstract Deionized water at a temperature of 25 °C was used as the cooling fluid and aluminium as the heat sink material in the geometric optimization and parameter modelling of subcooled flow boiling in horizontal equilateral triangular microchannel heat sinks. The thermal resistances of the microchannels were minimized subject to fixed volume constraints of the heat sinks and microchannels. A computational fluid dynamics (CFD) ANSYS code used for both the simulations and the optimizations was validated by the available experimental data in the literature and the agreement was good. Fixed heat fluxes between 100 and 500 W/cm2 and velocities between 0.1 and 7.0 m/s were used in the study. Despite the relatively high heat fluxes in this study, the base temperatures of the optimal microchannel heat sinks were within the acceptable operating range for modern electronics. The pumping power requirements for the optimal microchannels are low, indicating that they can be used in the cooling of electronic devices.

Download Full-text