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Modeling and design of a novel cooli...

Wu, Tao.

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Modeling and design of a novel cooling device for microelectronics using piezoelectric resonating beams.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Modeling and design of a novel cooling device for microelectronics using piezoelectric resonating beams./
作者:	Wu, Tao.
面頁冊數:	224 p.
附註:	Source: Dissertation Abstracts International, Volume: 64-11, Section: B, page: 5753.
Contained By:	Dissertation Abstracts International64-11B.
標題:	Engineering, Mechanical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3112815
ISBN:	0496603116

Modeling and design of a novel cooling device for microelectronics using piezoelectric resonating beams.
Wu, Tao.

Modeling and design of a novel cooling device for microelectronics using piezoelectric resonating beams. - 224 p.

Source: Dissertation Abstracts International, Volume: 64-11, Section: B, page: 5753.

Thesis (Ph.D.)--North Carolina State University, 2003.

As thermal management in microelectronics becomes more and more important in insuring the reliable operation, a novel and effective cooling device by smart materials such as piezoelectric bimorph needs to be developed. Investigation of modeling and design of piezoelectric resonating structures was conducted. A dynamic performance prediction method was proposed to calculate tip deflections at resonances and investigate the effect of finite stiffness bonding layer in piezoelectric bimorph. Considering the product of resonance frequency and dynamic tip deflection as a performance merit, the effects of length and location of the actuators on passive piezoelectric structures as well as the boundary conditions were analyzed for generating acoustic streaming which may be used for cooling microelectronic components.

ISBN: 0496603116Subjects--Topical Terms:

783786
Engineering, Mechanical.

Modeling and design of a novel cooling device for microelectronics using piezoelectric resonating beams.
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245 1 0 $a Modeling and design of a novel cooling device for microelectronics using piezoelectric resonating beams.
300 $a 224 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-11, Section: B, page: 5753.
500 $a Chairman: Paul I. Ro.
502 $a Thesis (Ph.D.)--North Carolina State University, 2003.
520 $a As thermal management in microelectronics becomes more and more important in insuring the reliable operation, a novel and effective cooling device by smart materials such as piezoelectric bimorph needs to be developed. Investigation of modeling and design of piezoelectric resonating structures was conducted. A dynamic performance prediction method was proposed to calculate tip deflections at resonances and investigate the effect of finite stiffness bonding layer in piezoelectric bimorph. Considering the product of resonance frequency and dynamic tip deflection as a performance merit, the effects of length and location of the actuators on passive piezoelectric structures as well as the boundary conditions were analyzed for generating acoustic streaming which may be used for cooling microelectronic components.
520 $a The cooling effects generated by vibrating non-slot and slotted piezoelectric bimorphs were experimentally investigated. Validated finite element analyses were employed to simulate the vibration characteristics including the natural frequencies and mode shapes of different bimorph structures. Setting the operation frequency at the fundamental resonance frequency, the cooling effects were measured by the temperature drops of the heat source above the vibrating bimorph. Air flow patterns around the bimorph actuator were visualized using particle tracking velocimetry (PTV) as well. The experiments showed that there exists an optimal gap between the heat source and the vibrating bimorph which brings the maximum temperature drop and the cooling effect increases with the electric field strength. The enhancement of heat transfer between the heat source and the non-slot bimorph can be up to 210% with the acoustic streaming generated by the bimorph vibration. The presence of slots in the bimorphs may enhance the mixing of streams outside and inside the channel resulting in an amplified heat transfer performance. However, the number, location and size of slots may influence the vibration characteristics and the formation of swirling streaming. Finally, the heat transfer coefficient of the prototyped cooling device in terms of mean Nusselt number was correlated as a function of streaming Reynolds number.
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790 1 0 $a Ro, Paul I., $e advisor
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