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| 003 | EG-GiCUC | ||
| 005 | 20250223032430.0 | ||
| 008 | 191103s2019 ua dh f m 000 0 eng d | ||
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_aEG-GiCUC _beng _cEG-GiCUC |
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| 041 | 0 | _aeng | |
| 049 | _aDeposite | ||
| 097 | _aPh.D | ||
| 099 | _aCai01.13.05.Ph.D.2019.Ah.T | ||
| 100 | 0 | _aAhmed Safaa Foda | |
| 245 | 1 | 0 |
_aThree-dimensional numerical study of submerged spatial hydraulic jumps / _cAhmed Safaa Foda ; Supervised Abdallah S. Bazaraa , Yehya E. Imam |
| 246 | 1 | 5 | _aدراسة عددية ثلاثية الابعاد للقفزة الهيدروليكية المغمورة ذات الدوامات الجانبية |
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_aCairo : _bAhmed Safaa Foda , _c2019 |
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_a69 P. : _bcharts , facsimiles ; _c30cm |
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| 502 | _aThesis (Ph.D.) - Cairo University - Faculty of Engineering - Department of Civil Engineering | ||
| 520 | _aA three-dimensional numerical model was applied to simulate submerged spatial hydraulic jumps (SSHJ) downstream of a symmetric vent that discharges into a wider channel. Simulations were carried out for different aspect ratios of the vent, expansion ratios of vent width to downstream channel width, tailwater depth, and inlet Froude number. Depending on these factors, simulations indicated the formation of steady asymmetric SSHJ, oscillatory asymmetric SSHJ, and steady symmetric SSHJ, consistent with results of previous experimental studies. The model reproduced observed depth downstream of vent, jump length, and velocity profiles along channel centerline for steady symmetric SSHJ. For oscillatory asymmetric SSHJ, simulated oscillation frequencies had corresponding Strouhal numbers that varied with expansion ratio and ranged between 0.003 and 0.015. With piers downstream of the vent, oscillatory SSHJ continued to exhibit jet deflections when pier length was relatively short ({u2272}0.2 of jump length) but became steady asymmetric for longer piers. Numerical simulations with end sill downstream of the vent were conducted. End sill proved to be an efficient tool in stabilizing oscillatory SSHJ and reducing jump roller length | ||
| 530 | _aIssued also as CD | ||
| 653 | 4 | _aAbrupt channel expansion | |
| 653 | 4 | _aAsymmetric jump | |
| 653 | 4 | _aSubmerged spatial hydraulic jump | |
| 700 | 0 |
_aAbdallah Sadek Bazaraa , _eSupervisor |
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| 700 | 0 |
_aYehya Emad Imam , _eSupervisor |
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| 856 | _uhttp://172.23.153.220/th.pdf | ||
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_aNazla _eRevisor |
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_aSamia _eCataloger |
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| 942 |
_2ddc _cTH |
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_c74946 _d74946 |
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