2018
DOI: 10.1063/1.5013623
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Millimeter-scale liquid metal droplet thermal switch

Abstract: Devices capable of actively controlling heat flow have been desired by the thermal management community for decades. The need for thermal control has become particularly urgent with power densification resulting in devices with localized heat fluxes as high as 1 kW/cm2. Thermal switches, capable of modulating between high and low thermal conductances, enable the partitioning and active control of heat flow pathways. This paper reports a millimeter-scale thermal switch with a switching ratio >70, at heat… Show more

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Cited by 52 publications
(41 citation statements)
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“…This is usually achieved by using pumps [ 38,39 ] or fans [ 38,40,41 ] or by tilting (gravitational actuation). [ 42,43 ] Another possibility that remains less investigated is to replace the pump by movable pistons or membranes driven by stepper motors, linear actuators, pull‐back springs, or piezo‐transducers.…”
Section: Fluidic Thermal Control Devicesmentioning
confidence: 99%
See 3 more Smart Citations
“…This is usually achieved by using pumps [ 38,39 ] or fans [ 38,40,41 ] or by tilting (gravitational actuation). [ 42,43 ] Another possibility that remains less investigated is to replace the pump by movable pistons or membranes driven by stepper motors, linear actuators, pull‐back springs, or piezo‐transducers.…”
Section: Fluidic Thermal Control Devicesmentioning
confidence: 99%
“…In fluidic bridge thermal switches, the heat source and the heat sink are separated by a small gap that can be closed or open to the surroundings. When closed, the gap can be empty (i.e., vacuum) [ 41,44,45 ] or be filled with another immiscible fluid (e.g., an inert gas or fluid like vapor or aqueous solution of NaOH [ 42 ] ) with low thermal conductivity. When open, the gap is normally filled with air.…”
Section: Fluidic Thermal Control Devicesmentioning
confidence: 99%
See 2 more Smart Citations
“…Recently, some researches has been devoted to the study of liquid-metal droplets ( Figure 2 D), which show great potential in self-powered devices [ 23 , 24 ] and phagocytosis [ 25 ]. Yang et al introduced millimeter-scale LMDs as thermal switches, unlocking new possible solutions for thermal management [ 26 ]. Tang et al electrically controlled the size and rate of LMD formation [ 27 ].…”
Section: Introductionmentioning
confidence: 99%