DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Lee, Seung Seob | - |
dc.contributor.advisor | 이승섭 | - |
dc.contributor.author | Ghavaminejad, Peyman | - |
dc.date.accessioned | 2021-05-11T19:35:11Z | - |
dc.date.available | 2021-05-11T19:35:11Z | - |
dc.date.issued | 2019 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=876065&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/283144 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 기계공학과, 2019.8,[iii, 42 p. :] | - |
dc.description.abstract | In microfluidics, it is well-known that if the Reynolds number is much smaller than unity, it is difficult to mix rapidly and homogenously two adjacent fluids. In this regard, acoustofluidics is a promising technique to help overcome this issue. In this Thesis, we report a bubble-induced acoustic method to enhance mixing efficiency for fast and homogenized mixing of highly viscous liquid. This device generates the random size of air bubbles in the microchannel. A piezoelectric transducer was used to activate bubbles in their resonant frequencies. When acoustically driven by a function generator and stereo-amplifier, the bubbles implode and fragment into smaller bubbles. Due to ultrasonic velocity which is different in bubble and liquid, the interface (membranes of bubbles) of these two different media which is a critical area, started to oscillate. The bubble oscillation resulted in a microstreaming phenomenon creating strong pressure divergence in the bulk liquid, thus giving rise to fast and homogenized mixing of two side-by-side flowing fluids. The performance of the mixer was characterized by mixing various high viscosity PDMS-toluene solutions at different flow rates. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | acoustofluidics▼abubble generation▼aacoustic cavitation▼ahighly viscous fluids | - |
dc.subject | 음향 유체 공학▼a버블 생성▼a음향 캐비테이션▼a고점도 유체▼a혼입 | - |
dc.title | Bubble generation and acoustic cavitation for microfluidic mixing of highly viscous liquids | - |
dc.title.alternative | 고점성 미세 유체 혼합을 위한 버블 생성과 음향 캐비테이션 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :기계공학과, | - |
dc.contributor.alternativeauthor | 페이만 | - |
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