Study of hotspot cooling using electrowetting on dielectric digital microfluidic system

Bindiganavale, Govindraj Shreyas; You, Seungkwon; Moon, Hyejin

doi:10.1109/memsys.2014.6765822

Cited by 16 publications

(9 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This low-energy surface is also free from the hydrophobic polymer coating that behaves as an additional thermal barrier. However, DMF-based cooling studies [ 22 , 23 , 24 , 25 , 26 , 27 , 28 ] previously reported critically require the hydrophobic polymer coating on top of the hot spot to facilitate droplet transportation. As indicated in Figure 1 , while a cooling droplet passes over the target hot spot, the heat is rejected based on sensible heat transfer, which limits the level of applicable heat flux.…”

Section: Resultsmentioning

confidence: 99%

“…In recent years, DMF has drawn attraction as a liquid-handling platform for effective cooling of target heating sources [ 22 , 23 , 24 , 25 , 26 , 27 , 28 ]. Unlike conventional cooling technologies such as heat pipes [ 29 , 30 ], heat spreaders [ 31 , 32 ], microchannel-guided liquid cooling [ 33 , 34 ], and jet impingement cooling [ 35 ], DMF does not require additional mechanical components such as pumps, valves, microchannels, and capillary wick structures for coolant delivery.…”

Section: Introductionmentioning

confidence: 99%

“…Despite numerous studies of DMF-based cooling previously reported [ 22 , 23 , 24 , 25 , 26 , 27 , 28 ], such a single-phase heat transfer approach cannot be used for high-heat-flux (>100 W/cm 2 ) applications, for example, high power density semiconductors such as graphic processing units (GPUs), power amplifiers, and insulated gate bipolar transistors (IGBTs). In order to achieve high-heat-flux dissipation, the two-phase heat transfer mechanism needs to be integrated [ 29 , 30 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Single-Sided Digital Microfluidic (SDMF) Devices for Effective Coolant Delivery and Enhanced Two-Phase Cooling

Park

Nam

2016

Micromachines

View full text Add to dashboard Cite

Digital microfluidics (DMF) driven by electrowetting-on-dielectric (EWOD) has recently been attracting great attention as an effective liquid-handling platform for on-chip cooling. It enables rapid transportation of coolant liquid sandwiched between two parallel plates and drop-wise thermal rejection from a target heating source without additional mechanical components such as pumps, microchannels, and capillary wicks. However, a typical sandwiched configuration in DMF devices only allows sensible heat transfer, which seriously limits heat rejection capability, particularly for high-heat-flux thermal dissipation. In this paper, we present a single-sided digital microfluidic (SDMF) device that enables not only effective liquid handling on a single-sided surface, but also two-phase heat transfer to enhance thermal rejection performance. Several droplet manipulation functions required for two-phase cooling were demonstrated, including continuous droplet injection, rapid transportation as fast as 7.5 cm/s, and immobilization on the target hot spot where heat flux is locally concentrated. Using the SDMF platform, we experimentally demonstrated high-heat-flux cooling on the hydrophilic-coated hot spot. Coolant droplets were continuously transported to the target hot spot which was mitigated below 40 K of the superheat. The effective heat transfer coefficient was stably maintained even at a high heat flux regime over ~130 W/cm2, which will allow us to develop a reliable thermal management module. Our SDMF technology offers an effective on-chip cooling approach, particularly for high-heat-flux thermal management based on two-phase heat transfer.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Single-Sided Digital Microfluidic (SDMF) Devices for Effective Coolant Delivery and Enhanced Two-Phase Cooling

Park

Nam

2016

Micromachines

View full text Add to dashboard Cite

show abstract

“…Owing to its simplicity and effectiveness, EWOD has a wide range of applications such as circuit hotspot cooling, 20,21 liquid microlens, [22][23][24] and electronic ink displays. 5 More importantly, as a fluidic manipulation technique, EWOD is suitable for LOC applications, in which regular biomedical analyses are miniaturized and integrated for point-of-care (POC) diagnosis before treatment.…”

Section: Chuanjie Shenmentioning

confidence: 99%

Combining sensors and actuators with electrowetting-on-dielectric (EWOD): advanced digital microfluidic systems for biomedical applications

Tong

Shen

et al. 2023

Analyst

View full text Add to dashboard Cite

show abstract

“…One of the most studied case is the cooling of surfaces by droplets of coolants on demand. [ 120–123 ] Ahmad et al. designed a method for cooling hot spots in electronic devices.…”

Section: Ewod Devices Applicationsmentioning

confidence: 99%

Materials and Manufacturing Methods for EWOD Devices: Current Status and Sustainability Challenges

Caro‐Pérez

Casals‐Terré

Roncero

2022

Macro Materials & Eng

View full text Add to dashboard Cite

Electrowetting-on-dielectric (EWOD) devices have proven to be effective tools for precise microfluidic manipulation or in liquid lenses that surpass conventional solid lenses in versatility. However, the fabrication of these devices presents many challenges, such as their scalability or the growing concern on their environmental impact due to materials used in their fabrication. This review provides a comprehensive analysis of the materials currently used in the fabrication of EWOD devices and the characteristics they must meet. In addition, a discussion of future challenges in the fabrication of EWOD devices is presented, in particular the environmental problems presented by some of the materials currently in use.

show abstract

Study of hotspot cooling using electrowetting on dielectric digital microfluidic system

Cited by 16 publications

References 6 publications

Single-Sided Digital Microfluidic (SDMF) Devices for Effective Coolant Delivery and Enhanced Two-Phase Cooling

Single-Sided Digital Microfluidic (SDMF) Devices for Effective Coolant Delivery and Enhanced Two-Phase Cooling

Combining sensors and actuators with electrowetting-on-dielectric (EWOD): advanced digital microfluidic systems for biomedical applications

Materials and Manufacturing Methods for EWOD Devices: Current Status and Sustainability Challenges

Contact Info

Product

Resources

About