| 학회 | 한국화학공학회 |
| 학술대회 | 2004년 봄 (04/23 ~ 04/24, 공주대학교) |
| 권호 | 10권 1호, p.817 |
| 발표분야 | 이동현상 |
| 제목 | Micro-Macro Simulation of Dumbbells |
| 초록 | The traditional simulation of polymeric liquid is classified into the macroscopic approach and microscopic approach. The former solves constitutive equation, conservation equation while the latter solves the extra stress using dynamics of a large collection of polymeric molecules in homogeneous flow. Recently there have been various tries, so-called CONNFFESSIT which combines the microscopic Brownian dynamics simulations with the macroscopic finite element method to get more realistic solution. However, due to massive stochastic calculation, these simulations can get only the solution of a few parameters in simple geometry. In this study, we simulate 4:1 contraction flow of Hookean, FENE dumbbells as Weissenburg number increases using Brownian Configuration Field method and parallel solver. Compared to Hookean dumbbell, FENE dumbbell predicts larger stress at the start and smaller stress at the steady state. In both case of Hookean and FENE dumbbell simulation, corner and lip vortex appeared, and the size of vortices are similar but the intensity of FENE dumbbell is weaker than Hookean dumbbell. More accurate modeling is possible through micro-macro simulation. |
| 저자 | 송선진1, 정창권1, 김주민2, 안경현1, 이승종1 |
| 소속 | 1서울대, 2고려대 |
| 키워드 | Brownian configuration field; 4:1 contraction |
| VOD | VOD 보기 |
| 원문파일 | 초록 보기 |
