| 학회 | 한국화학공학회 |
| 학술대회 | 2022년 봄 (04/20 ~ 04/23, 제주국제컨벤션센터) |
| 권호 | 28권 1호, p.1315 |
| 발표분야 | [주제 12] 화학공학일반(부문위원회 발표) |
| 제목 | Flow and slip behaviors of carbopol microgel solution in microchannel |
| 초록 | The fluids used in the coating process with multifunctional films usually have nano- or micro-sized particles, forming microstructure. Due to this microstructure, these fluids show complex rheological properties such as yield stress. In bulk fluid, these fluids were modeled by the Bingham model and the Herschel-Bulkley model. However, those models do not work well when the length scale of the channel is comparable to the size of the microstructure inside the fluid. Therefore, a new understanding of the fluid flow behavior in confined flow is required. Herein, we investigated flow behaviors of microgel solution in confined flow with microchannel made with polydimethylsiloxane (PDMS). Carbopol 941 solution was used as a model fluid. A new velocimetry method based on image processing of flow visualization was introduced. We determined that a yield-free model was a more reasonable model to choose for the confined flow of the microgel solution than the Herschel-Bulkley model. Also, we identified the slip behavior to be important for analyzing the confined flow. |
| 저자 | 정현준, 박정원, 김동재, 남재욱 |
| 소속 | 서울대 |
| 키워드 | 이동현상(Transport Phenomena) |
| 원문파일 | 초록 보기 |
