Numerical and analytical studies of single and multiphase starting jets and plumes
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2014.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2014
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| Online Access: | http://hdl.handle.net/1721.1/90048 |
| _version_ | 1811074877778558976 |
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| author | Wang, Ruo-Qian |
| author2 | E. Eric Adams. |
| author_facet | E. Eric Adams. Wang, Ruo-Qian |
| author_sort | Wang, Ruo-Qian |
| collection | MIT |
| description | Thesis: Ph. D., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2014. |
| first_indexed | 2024-09-23T09:56:46Z |
| format | Thesis |
| id | mit-1721.1/90048 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T09:56:46Z |
| publishDate | 2014 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/900482019-04-12T21:55:03Z Numerical and analytical studies of single and multiphase starting jets and plumes Wang, Ruo-Qian E. Eric Adams. Massachusetts Institute of Technology. Department of Civil and Environmental Engineering. Massachusetts Institute of Technology. Department of Civil and Environmental Engineering. Civil and Environmental Engineering. Thesis: Ph. D., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2014. Cataloged from PDF version of thesis. Includes bibliographical references. Multiphase starting jets and plumes are widely observed in nature and engineering systems. An environmental engineering example is open-water disposal of sediments. The present study numerically simulates such starting jets/plumes using Large Eddy Simulations. The numerical scheme is first validated for single phase plumes, and the relationship between buoyancy and penetration rate is revealed. Then, the trailing stem behind the main cloud is identified, and the the formation number (critical ratio U[delta]t/D, where U, D and [delta]t are discharge velocity, diameter and duration) that determines its presence is determined as a function of plume buoyancy. A unified relationship for starting plumes is developed to describe behaviors from negative to positive buoyancy. In multiphase simulations, two-phase phenomena are clarified including phase separation and the effect of particle release conditions. The most popular similarity law to scale up from the lab to the field (Cloud number scaling) is validated by a series of simulations. Finally, an example of sediment disposal in the field is given based on the present study. In related theoretical analysis, an analytical model on the vortex ring is developed and found to agree well with the direct numerical simulation results. by Ruo-Qian Wang. Ph. D. 2014-09-19T21:36:38Z 2014-09-19T21:36:38Z 2014 2014 Thesis http://hdl.handle.net/1721.1/90048 890139957 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 195 pages application/pdf Massachusetts Institute of Technology |
| spellingShingle | Civil and Environmental Engineering. Wang, Ruo-Qian Numerical and analytical studies of single and multiphase starting jets and plumes |
| title | Numerical and analytical studies of single and multiphase starting jets and plumes |
| title_full | Numerical and analytical studies of single and multiphase starting jets and plumes |
| title_fullStr | Numerical and analytical studies of single and multiphase starting jets and plumes |
| title_full_unstemmed | Numerical and analytical studies of single and multiphase starting jets and plumes |
| title_short | Numerical and analytical studies of single and multiphase starting jets and plumes |
| title_sort | numerical and analytical studies of single and multiphase starting jets and plumes |
| topic | Civil and Environmental Engineering. |
| url | http://hdl.handle.net/1721.1/90048 |
| work_keys_str_mv | AT wangruoqian numericalandanalyticalstudiesofsingleandmultiphasestartingjetsandplumes |