| Status | 已發表Published |
| Flow entrainment of gravity currents | |
| Mok，K. M.1; Yeh，Harry H.2; Ieong，K. K.1; Hoi，K. I.1 | |
| 2011 | |
| Source Publication | ASME-JSME-KSME 2011 Joint Fluids Engineering Conference, AJK 2011
 |
| Volume | 1 |
| Issue | PARTS A, B, C, D |
| Pages | 2955-2962 |
| Abstract | The entrainment of gravity currents advancing over a horizontal bed was studied. A two-dimensional rigid-lid flow model was derived assuming ambient-fluid entrainment to the mixing region being supplied only from the bottom layer of the approaching flow. Two sets of laboratory experiments were carried out using the laser-induced fluorescence (LIF) flow visualization technique. With given parameters such as the total fluid depth, densities of the fluids, height of the gravity current head and its propagation speed, and the denser-fluid flow depth behind the head under the mixing region, our model predicts that the thickness of the front flow layer to be entrained is about 35 percents of the height of the gravity current head. Qualitative examination of the flow structures along various planes in the developed fronts suggests that the actual flow structures at the foremost part of the current head are complex and three dimensional. Entrainment of ambient fluid to the current is through various directions starting at its front, which creates an unstable stratification condition there favorable for the subsequent complex three-dimensional eddy generation and growth leading to the formation of the short-crested billows exhibiting the lobe-and-cleft features in the following flow. Copyright © 2011 by ASME. |
| DOI | 10.1115/AJK2011-16022 |
| URL | View the original |
| Language | 英語English |
| Scopus ID | 2-s2.0-84881415495 |
| Fulltext Access | |
| Citation statistics | |
| Document Type | Conference paper |
| Collection | University of Macau |
| Affiliation | 1.University of Macau,Macao 2.Oregon State University,Corvallis, OR,United States |
| First Author Affilication | University of Macau |
| Recommended Citation GB/T 7714 | Mok，K. M.,Yeh，Harry H.,Ieong，K. K.,et al. Flow entrainment of gravity currents[C], 2011, 2955-2962. |
| APA | Mok，K. M.., Yeh，Harry H.., Ieong，K. K.., & Hoi，K. I. (2011). Flow entrainment of gravity currents. ASME-JSME-KSME 2011 Joint Fluids Engineering Conference, AJK 2011, 1(PARTS A, B, C, D), 2955-2962. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment