| 학회 | 한국화학공학회 |
| 학술대회 | 2003년 가을 (10/24 ~ 10/25, 한양대학교) |
| 권호 | 9권 2호, p.2623 |
| 발표분야 | 이동현상 |
| 제목 | Stability of the interface in two-layer Poiseuille flow |
| 초록 | The linear stability analysis of a two-layer plane Poiseuille flow to disturbances of arbitrary wavelengths using upper convected Maxwell (UCM) model has been investigated. The governing equations is solved numerically using expansions in Chebyshev polynomials and the QR matrix eigenvalue algorithm. According to the varying of fluid densities, viscosities, and elasticities with surface tension at interface, the stability diagrams of the coextrusion process were changed. Moreover, the numerical results by the linear stability analysis were compared to the experiemental results of two-layer flow in the rectangular channel. At the experiments, the stability was determined by the grow/decay ratio of wave disturbance, caused by the sinusoidal extrusion velocity, in the two pairs of viewing glasses. Acknowledgement This study was supported by research grants from the KOSEF through the Applied Rheology Center (ARC). |
| 저자 | 김학선, 이주성, 정현욱, 현재천 |
| 소속 | 고려대 |
| 키워드 | coextrusion; stability; two-layer |
| 원문파일 | 초록 보기 |
