| 학회 |
한국화학공학회 |
| 학술대회 |
2005년 가을 (10/21 ~ 10/22, 인하대학교) |
| 권호 |
11권 2호, p.2437 |
| 발표분야 |
이동현상 |
| 제목 |
The Analysis of the Onset of Soret-Driven Convection in Nanofluids Heated from Above |
| 초록 |
The onset of buoyancy driven convection in an initially-quiescent horizontal nanofluid layer heated from above is analyzed theoretically. In this thermally-stably stratified fluid layer, the Soret diffusion can induced buoyancy-driven motion for the case of negative φ. For the case of high Ra(Le/φ)-1 the buoyancy-driven motion sets in during the transient diffusion stage and the onset time of this motion is analyzed by employing propagation theory. Here the dimensionless critical condition of τc and ac to mark the onset of convective motion is presented as a function of Ra(Le/φ)-1. The present stability analysis predicts that τc decreases with increasing Ra(Le/φ)-1 and the finite wave mode is preferred for small time. The visible motion can be detected from a certain time τm=4τc. The present predictions are compared with existing experimental results. |
| 저자 |
김민찬1, 최창균2
|
| 소속 |
1제주대, 2서울대 |
| 키워드 |
nanofluid; buoyancy-driven instability; Soret effect; propagation theory
|
| E-Mail |
|
| VOD |
VOD 보기 |
| 원문파일 |
초록 보기 |
