MARC details
| 000 -LEADER |
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| fixed length control field |
03181cam a2200325 a 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
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| control field |
EG-GiCUC |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
170218s2016 ua h f m 000 0 eng d |
| 040 ## - CATALOGING SOURCE |
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| Original cataloging agency |
EG-GiCUC |
| Language of cataloging |
eng |
| Transcribing agency |
EG-GiCUC |
| 041 0# - LANGUAGE CODE |
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| Language code of text/sound track or separate title |
eng |
| 049 ## - LOCAL HOLDINGS (OCLC) |
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| Holding library |
Deposite |
| 097 ## - Thesis Degree |
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| Thesis Level |
Ph.D |
| 099 ## - LOCAL FREE-TEXT CALL NUMBER (OCLC) |
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| Classification number |
Cai01.13.05.Ph.D.2016.Mu.E |
| 100 0# - MAIN ENTRY--PERSONAL NAME |
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| Personal name |
Muhanad Mohammed Abbas |
| 245 10 - TITLE STATEMENT |
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| Title |
Experimental and numerical investigation of collar effect on local scour and flow structure around single cylindrical pier / |
| Statement of responsibility, etc. |
Muhanad Mohammed Abbas ; Supervised Mohammed Sh. Elmanadely , Ahmad M. Helmi , Ahmad H. Shehata |
| 246 15 - VARYING FORM OF TITLE |
|---|
| Title proper/short title |
الفحص المعملي والرقمي لتأثير الياقة على النحر المحلي وهيكلية الجريان حول دعامة مفردة اسطوانية الشكل |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. |
|---|
| Place of publication, distribution, etc. |
Cairo : |
| Name of publisher, distributor, etc. |
Muhanad Mohammed Abbas , |
| Date of publication, distribution, etc. |
2016 |
| 300 ## - PHYSICAL DESCRIPTION |
|---|
| Extent |
190 P. : |
| Other physical details |
facsimiles ; |
| Dimensions |
30cm |
| 502 ## - DISSERTATION NOTE |
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| Dissertation note |
Thesis (Ph.D.) - Cairo University - Faculty of Engineering - Department of Civil Engineering |
| 520 ## - SUMMARY, ETC. |
|---|
| Summary, etc. |
The scour phenomenon around bridge piers causes a lot of annually damages all over the world. In this regard, to understand how to control scours around a cylindrical pier, it is necessary to describe the flow structure and vortices system with and without protection. Therefore, in this study the collar effect on local scour and flow structure around single bridge pier investigated experimentally and numerically by using a commercial CFD solver (FLUENT) three dimensional model for circular collar diameter of (2D, 3D, and 4D) and elevations of (zero, -0.5D, -1D, -1.5D) from the bed level, where D is the pier diameter. The experimental results showed that, the best location and diameter of collar found to be at one half pier diameter below original bed level and 4 times of pier diameter respectively. In this arrangement the scour depth is reduced by 52.74%, scouring volume is decreased by 56% and scour hole surface area is decreased by 19% compared with unprotected pier. The effect of the collar located at the bed level on the scour depth reduction is insignificant. Scour hole volume and surface area are a function of collar diameter and collar elevation. The depth and location of maximum scour depth is a function of collar diameter and level. The scour depth reduction increases as collar diameter increases and collar elevation decreases till specific level. From the experimental results, five equations are proposed to predict the optimum collar elevation, maximum equilibrium scour depth, percentage of scour depth reduction and upstream and downstream pier equilibrium scour depth. From the numerical simulation results and analysis, the effect of the collar on the local scour and flow structure may be concluded as: Maximum longitudinal and transversal velocity at pier increases with increasing collar diameter |
| 530 ## - ADDITIONAL PHYSICAL FORM AVAILABLE NOTE |
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| Additional physical form available note |
Issued also as CD |
| 653 #4 - INDEX TERM--UNCONTROLLED |
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| Uncontrolled term |
Collar |
| 653 #4 - INDEX TERM--UNCONTROLLED |
|---|
| Uncontrolled term |
local scour |
| 653 #4 - INDEX TERM--UNCONTROLLED |
|---|
| Uncontrolled term |
Pier |
| 700 0# - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Ahmad H. Shehata , |
| Relator term |
|
| 700 0# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Ahmad M. Helmi , |
| Relator term |
|
| 700 0# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Mohammed Sh. Elmanadely , |
| Relator term |
|
| 905 ## - LOCAL DATA ELEMENT E, LDE (RLIN) |
|---|
| Cataloger |
Nazla |
| Reviser |
Revisor |
| 905 ## - LOCAL DATA ELEMENT E, LDE (RLIN) |
|---|
| Cataloger |
Shaima |
| Reviser |
Cataloger |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
|---|
| Source of classification or shelving scheme |
Dewey Decimal Classification |
| Koha item type |
Thesis |
