Mikropompa elektrohydrodynamiczna na ciecz dielektryczną zasilana napięciem stałym

Efektywność odprowadzania ciepła z elementów półprzewodnikowych za pomocą pompy EHD

We survey progress over the past 25 years in the development of microscale devices for pumping fluids. We attempt to provide both a reference for micropump researchers and a resource for those outside the field who wish to identify the best micropump for a particular application. Reciprocating displacement micropumps have been the subject of extensive research in both academia and the private sector and have been produced with a wide range of actuators, valve configurations and materials. Aperiodic displacement micropumps based on mechanisms such as localized phase change have been shown to be suitable for specialized applications. Electroosmotic micropumps exhibit favorable scaling and are promising for a variety of applications requiring high flow rates and pressures. Dynamic micropumps based on electrohydrodynamic and magnetohydrodynamic effects have also been developed. Much progress has been made, but with micropumps suitable for important applications still not available, this remains a fertile area for future research.

https://microfluidics.stanford.edu/Publications/Micropumps_Cooling/Laser%20Review%20of%20Micropumps%20in%20JMM.pdf

A review of micropumps

This paper presents the design, fabrication, and characterization of an innovative microcooling device for microelectronics applications. The device incorporates an active evaporative cooling surface, a polarization micropump, and temperature sensors into a single chip. The micropump provides the required pumping action to bring the working fluid to the evaporating surface, allowing the effective heat transfer coefficient through a thin-film evaporation/boiling process. The device is based on VLSI microfabrication technology, allowing the electrohydrodynamic (EHD) electrodes to be integrated directly onto the cooling surface. Since the EHD electrodes are fabricated using the same technology as the electronic systems themselves, the proposed microelectronic cooling system in the form of an integrated microchip is very suitable for mass production. The prototype devices demonstrated a maximum cooling capacity of 65 W/cm/sup 2/ with a corresponding pumping head of 250 Pa. The results of this investigation will assist in the development of future microcooling devices capable of operating at high power levels.

An electrohydrodynamic polarization micropump for electronic cooling

The ultimate flow rate and velocity of an electrohydrodynamic (EHD) pump with a given length and depth are determined by the material properties of the working fluid. High dielectric constant, and low viscosity lead to high flow velocities, while low conductivity and mobility promote high efficiency. A fundamental model of EHD pumping is formulated to account for the material properties of the working fluid, and is applied to several experimental pumps reported earlier, with generally good agreement. An example of the use of this model to select a working fluid for a typical pump suggests several new liquids suitable for EHD pumping. >

Selecting a working fluid to increase the efficiency and flow rate of an EHD pump

Experimental Study of EHD Conduction Pumping at the Micro-scale

This paper describes the concept of Electrohydrodynamic (EHD) pumping in microchannels and the study of EHD pumps in IntelliSuite's Microfluidic simulation module. The EHD pump study focuses on the factors influencing the velocity of fluid flow such as the conductivity of the fluid, the frequency of the driving AC voltage, the phase of the driving signal, the dimensions of the electrode, the gap between the electrodes and the number of driving electrodes. The results from the simulation will be used to characterize the presented design of the EHD pump. The presented design for the study of the EHD pump has a microchannel with a length of 0.2mm, width of 0.08mm and a thickness of 0.08mm. The width of the driving electrodes present at the bottom of the channel is 0.01mm and the gap between the electrodes is 0.04mm.

https://iopscience.iop.org/article/10.1088/1742-6596/34/1/116/pdf

Mikropompa elektrohydrodynamiczna na ciecz dielektryczną zasilana napięciem stałym

Citations

Efektywność odprowadzania ciepła z elementów półprzewodnikowych za pomocą pompy EHD

References

A review of micropumps

An electrohydrodynamic polarization micropump for electronic cooling

Selecting a working fluid to increase the efficiency and flow rate of an EHD pump

Experimental Study of EHD Conduction Pumping at the Micro-scale

Electro Hydrodynamic Pumping of Liquids in Microchannels