Two-Dimensional Actuation of Liquid-Metal Droplets for Hot-Spot Cooling

2021 ◽  
Author(s):  
Saige J. Dacuycuy ◽  
Wayne A. Shiroma ◽  
Aaron T. Ohta
Keyword(s):  
Liquid Metal ◽  
Hot Spot ◽  
Two Dimensional ◽  
Spot Cooling ◽  
Metal Droplets

Two-dimensional oscillation of convection roll in a finite liquid metal layer under a horizontal magnetic field

2021 ◽  
Vol 911 ◽  
Author(s):  
Y. Tasaka ◽  
T. Yanagisawa ◽  
K. Fujita ◽  
T. Miyagoshi ◽  
A. Sakuraba
Keyword(s):  
Magnetic Field ◽  
Liquid Metal ◽  
Metal Layer ◽  
Two Dimensional ◽  
Horizontal Magnetic Field ◽  
Convection Roll

Abstract

Investigation of On-Chip Hot Spot Cooling Using Microchannel Heat Sink

2013 ◽  
Vol 455 ◽  
pp. 466-469
Author(s):  
Yun Chuan Wu ◽  
Shang Long Xu ◽  
Chao Wang
Keyword(s):  
Heat Flux ◽  
Heat Sink ◽  
Hot Spots ◽  
Hot Spot ◽  
High Heat ◽  
High Heat Flux ◽  
Microchannel Heat Sink ◽  
Three Dimensional Model ◽  
Spot Cooling ◽  
On Chip

With the increase of performance demands, the nonuniformity of on-chip power dissipation becomes greater, causing localized high heat flux hot spots that can degrade the processor performance and reliability. In this paper, a three-dimensional model of the copper microchannel heat sink, with hot spot heating and background heating on the back, was developed and used for numerical simulation to predict the hot spot cooling performance. The hot spot is cooled by localized cross channels. The pressure drop, thermal resistance and effects of hot spot heat flux and fluid flow velocity on the cooling of on-chip hot spots, are investigated in detail.

scholarly journals In-situ monitoring for liquid metal jetting using a millimeter-wave impedance diagnostic

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Tammy Chang ◽  
Saptarshi Mukherjee ◽  
Nicholas N. Watkins ◽  
David M. Stobbe ◽  
Owen Mays ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Millimeter Wave ◽  
Manufacturing Systems ◽  
Wave Impedance ◽  
In Situ Monitoring ◽  
Full Wave ◽  
Drop On Demand ◽  
The Time Domain ◽  
Metal Droplets

AbstractThis article presents a millimeter-wave diagnostic for the in-situ monitoring of liquid metal jetting additive manufacturing systems. The diagnostic leverages a T-junction waveguide device to monitor impedance changes due to jetted metal droplets in real time. An analytical formulation for the time-domain T-junction operation is presented and supported with a quasi-static full-wave electromagnetic simulation model. The approach is evaluated experimentally with metallic spheres of known diameters ranging from 0.79 to 3.18 mm. It is then demonstrated in a custom drop-on-demand liquid metal jetting system where effective droplet diameters ranging from 0.8 to 1.6 mm are detected. Experimental results demonstrate that this approach can provide information about droplet size, timing, and motion by monitoring a single parameter, the reflection coefficient amplitude at the input port. These results show the promise of the impedance diagnostic as a reliable in-situ characterization method for metal droplets in an advanced manufacturing system.

Ultrathin oxysulfide semiconductors from liquid metal: a wet chemical approach

2021 ◽  
Author(s):  
Chung Nguyen ◽  
Nitu Syed ◽  
Mei Xian Low ◽  
Ali Zavabeti ◽  
Azmira Jannat ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Electronic Properties ◽  
Two Dimensional ◽  
Group Vi ◽  
Chemical Approach ◽  
Wet Chemical

Metal oxychalcogenides are emerging as a new motif of group VI-A semiconductors with unique electronic properties. Among this family, two dimensional (2D) oxysulfide materials have been increasingly involved in the...

scholarly journals Shaping and Controlled Fragmentation of Liquid Metal Droplets through Cavitation

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
M. S. Krivokorytov ◽  
Q. Zeng ◽  
B. V. Lakatosh ◽  
A. Yu. Vinokhodov ◽  
Yu. V. Sidelnikov ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Metal Droplets
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