Manufacturing fluidic and heat transfer devices withpolymer materials using selective transmission laserwelding
Başlık çevirisi mevcut değil.
- Tez No: 720064
- Danışmanlar: DR. VOLFANGO BERTOLA, DR. STUART EDWARDSON
- Tez Türü: Doktora
- Konular: Polimer Bilim ve Teknolojisi, Polymer Science and Technology
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2020
- Dil: İngilizce
- Üniversite: University of Liverpool
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 273
Özet
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Özet (Çeviri)
This thesis presents a novel and state-of-the-art advanced manufacturing method to manufacture exible uidic and heat transfer devices, which is straightforward and aordable. The present thesis is the result of a four-year experimental research project, which aimed to manufacture exible uidic and heat transfer devices, such as pulsating heat pipes/stripes (PHP/PHS), serpentine channels and channels with a sudden area contraction, using a CO2 laser cutting and selective transmission laser welding processes. Polypropylene was used to manufacture uidic and heat transfer devices by the intended manufacturing techniques. After the successful manufacture of the pulsating heat pipe/stripe, proof of concept, thermal performance characterization and parametric characterization experiments were conducted, achieving approximately up to 400%-500% thermal performance increment in comparison to a composite polypropylene sheet without working uid. The serpentine channel was manufactured to investigate the mixing mechanism of two-phase ow (water-in-oil and glycerol solution-in-oil) using a high-speed imaging technique. Due to the channel geometry, the ow exhibited curved streamlines, which can induce ows and alter the ow pattern transition boundaries compared with those observed in straight channels. This can have signi cant applications in the development of a micro uidic mixing device. Lastly, the channels with a sudden area contraction were manufactured to investigate the ow of a non-Newtonian, viscoplastic uid using channels with dierent contraction angles and contraction ratios, obtaining ow structure maps, velocity pro les and pressure drop data. i
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