Zobrazeno 1 - 10
of 54
pro vyhledávání: '"manoochehr fathi moghadam"'
Publikováno v:
Water Supply, Vol 22, Iss 11, Pp 8337-8352 (2022)
The present experimental study analyzes the effects of lateral jet flow (LJF) in a stilling basin with abruptly expanding channels on the stabilization and the significant characteristics of spatial hydraulic jump. The experiments were carried out wi
Externí odkaz:
https://doaj.org/article/306a5828d9c8453aa488379758497410
Publikováno v:
مهندسی منابع آب, Vol 12, Iss 42, Pp 38-51 (2019)
Weirs are usually constructed by concrete and are impervious so that the water can only flow above the crest. In this between, Gabion weirs with instinctive characteristics including stability, conductivity and economic justification are strongly adv
Externí odkaz:
https://doaj.org/article/23cf94dadd2c410a9df034a95f9461e3
Publikováno v:
علوم و مهندسی آبیاری, Vol 42, Iss 1, Pp 99-114 (2019)
Destruction of bridges caused by scour and other natural phenomenon brings about financial and life losses. Hence, researchers have been studied extensively the scour mechanism and methods of scour countermeasure. Usually scour at bridge occurs both
Externí odkaz:
https://doaj.org/article/712cce7862ea4e88833dde8a5addd7dd
Publikováno v:
علوم و مهندسی آبیاری, Vol 40, Iss 4, Pp 125-139 (2018)
Distribution pattern of the river bed particles grading creates important issues in investigation of the hydraulic, geomorphological and ecological behavior of the river.. For example, surface grain-size variability is crucial for illustrating sedime
Externí odkaz:
https://doaj.org/article/66460ba0d13549c1922052238d199180
Autor:
Shokoofeh Sharoonizadeh, Javad Ahadiyan, Anna Rita Scorzini, Mario Di Bacco, Mohsen Sajjadi, Manoochehr Fathi Moghadam
Publikováno v:
Water, Vol 13, Iss 18, p 2572 (2021)
This study presents an investigation on the use of submerged counterflow jets as a means for stabilizing the spatial hydraulic jump occurring in abruptly expanding channels. The characteristics of the flow downstream from the stilling basin and the m
Externí odkaz:
https://doaj.org/article/da7b895fa7fe49318f67653202069ab6
Publikováno v:
علوم و مهندسی آبیاری, Vol 39, Iss 4, Pp 35-46 (2016)
Aim of this study is to measure shear stress in smooth rectangular and trapezoidal open channels. A new approach is presented to measure direct shear on wet perimeter of open channels. A water flume with a section on a frictionless support (called kn
Externí odkaz:
https://doaj.org/article/6ead2c450e73419e8a6a320024a4fc3b
Autor:
Mohammad Hossein Purmohammadi, Mehdi Ghomeshi, Seyed Habib Mosavi Jahromi, Seyed Mahmoud KashefiPour, Manoochehr Fathi Moghadam
Publikováno v:
علوم و مهندسی آبیاری, Vol 39, Iss 1, Pp 11-20 (2016)
In many cases the collection of obstacles stand against water flow direction and by passing water through these obstacles, vortexes are created in downstream of them and by overlapping of these vortexes, surface waves perpendicular to the flow direct
Externí odkaz:
https://doaj.org/article/4cc5bf9496684549968203b65a301f77
Publikováno v:
علوم و مهندسی آبیاری, Vol 37, Iss 4, Pp 63-76 (2015)
The currently most widely used erosion models are poorly based on physical principles and lack the ability to describe erosion of the consolidated sediment bed at increased shear stresses e.g. during a storm. There is a need for a new modeling approa
Externí odkaz:
https://doaj.org/article/e0b693098f6c4bfdb355fcaae7643814
Publikováno v:
علوم و مهندسی آبیاری, Vol 33, Iss 2, Pp 43-52 (2010)
This Study reports on experiments concerning the boundary shear stress and boundary shear force distributions in a smooth rectangular channel. The boundary shear stresses were measured with a 4-mm outside diameter Preston tube in conjunction with a d
Externí odkaz:
https://doaj.org/article/5432d2903c694c5e9d28ee24305e67ad
Publikováno v:
علوم و مهندسی آبیاری, Vol 33, Iss 1, Pp 77-91 (2009)
Laboratory experiments were conducted in smooth trapezoidal channel with side slope 1:1 to measure boundary force and shear stress. Preston tube is used to estimate contribution of wall and bed shear stresses. Available formulas for estimation of bou
Externí odkaz:
https://doaj.org/article/f948efc543964028990164ad32256f17