Numerical simulation of the ferro-nanofluid flow in a porous ribbed microchannel heat sink: investigation of the first and second laws of thermodynamics with single-phase and two-phase approaches

2020 ◽  
Vol 42 (9) ◽  
Author(s):  
Quyen Nguyen ◽  
Shahab Naghdi Sedeh ◽  
Davood Toghraie ◽  
Rasool Kalbasi ◽  
Arash Karimipour
Keyword(s):  
Numerical Simulation ◽  
Heat Sink ◽  
Single Phase ◽  
Microchannel Heat Sink ◽  
Nanofluid Flow ◽  
Two Phase ◽  
Laws Of Thermodynamics

Two-Phase Flow in Microchannels

2001 ◽  
Author(s):  
G. Hetsroni ◽  
A. Mosyak ◽  
Z. Segal
Keyword(s):  
Heat Sink ◽  
High Speed ◽  
Single Phase ◽  
Flow Boiling ◽  
Electronics Cooling ◽  
Working Fluid ◽  
Microchannel Heat Sink ◽  
Two Phase ◽  
Infrared Radiometry ◽  
Phase Water

Abstract Experimental investigation of a heat sink for electronics cooling is performed. The objective is to keep the operating temperature at a relatively low level of about 323–333K, while reducing the undesired temperature variation in both the streamwise and transverse directions. The experimental study is based on systematic temperature, flow and pressure measurements, infrared radiometry and high-speed digital video imaging. The heat sink has parallel triangular microchannels with a base of 250μm. According to the objectives of the present study, Vertrel XF is chosen as the working fluid. Experiments on flow boiling of Vertrel XF in the microchannel heat sink are performed to study the effect of mass velocity and vapor quality on the heat transfer, as well as to compare the two-phase results to a single-phase water flow.

The Effects of Hybrid Sandblasting Patterns on the Heat Transfer Performance in a Single-Phase Microchannel Heat Sink

2017 ◽  
Author(s):  
Saad K. Oudah ◽  
Ruixian Fang ◽  
Amitav Tikadar ◽  
Karim Egab ◽  
Chen Li ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Sink ◽  
Single Phase ◽  
Heat Transfer Performance ◽  
Bottom Surface ◽  
High Heat Flux ◽  
Microchannel Heat Sink ◽  
Transfer Performance ◽  
Two Phase ◽  
Number Range

An experimental investigation was conducted on a single phase microchannel heat sink, in which the bottom surface of the microchannel was modified with hybrid micro-sandblasting of elliptical patterns (HSEP) and fully sandblasting (FS) to passively enhance the microchannel heat transfer performance. The dimension of the microchannel is measured as 26 mm (L) × 5mm (W) × 0.35 mm (H), which results in a hydraulic diameter of 654 μm. Deionized water was used as the coolant, and the Reynolds number range between 85 to 650 was tested. The experimental results show that fully sandblasting (FS) bottom surface of the microchannel only slightly improved the heat transfer performance. However, the modified surface with HSEP enhanced the heat transfer performance substantially, compared to the benchmark results obtained with the bare surface (BS) microchannel. The pressure drops of the HSEP increased slightly compared to the BS and FS, due to the flow resistance of the microstructures. The proposed surface for enhancement of heat transfer will be useful in many high heat flux engineering applications. In the future, this study will be further extended to two-phase microchannel heat transfer.

Simulation of hybrid nanofluid flow within a microchannel heat sink considering porous media analyzing CPU stability

2021 ◽  
pp. 109734
Author(s):  
Jinyuan Wang ◽  
Yi-Peng Xu ◽  
Raed Qahiti ◽  
M. Jafaryar ◽  
Mashhour A. Alazwari ◽  
...  
Keyword(s):  
Porous Media ◽  
Heat Sink ◽  
Hybrid Nanofluid ◽  
Microchannel Heat Sink ◽  
Nanofluid Flow
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