Results 21 to 30 of about 2,024 (265)

Local scour at abutments: A review

Sadhana, 2004
Failure of bridges due to local scour has motivated many investigators to explore the causes of scouring and to predict the maximum scour depth at abutments. In this paper, a detailed review of the up-to-date work on scour at abutments is presented including all possible aspects, such as flow field, scouring process, parameters affecting scour depth ...
Abdul Karim Barbhuiya, Subhasish Dey
openaire   +2 more sources

Entropy‐Stabilized Aluminate Catalysts That Break the Activity–Stability Tradeoff in CF4 Hydrolysis

Angewandte Chemie, EarlyView.
Entropy‐stabilized aluminate breaks the activity–stability tradeoff in CF4 hydrolysis by combining a multication aluminate framework with an entropy‐stabilized lattice. An electron‐deficient Al–O environment is F‐philic but O‐phobic, enabling C–F activation while suppressing H2O poisoning. Under steam‐rich, strongly fluorinating conditions, the entropy‐
Seunghyuck Chi, Hyungmin Jeon, Yaejun Baik, DongHwan Oh, Jin Seok, Woosung Choi, Seungjun Lee, Minkee Choi   +7 more
wiley   +2 more sources

Local scour around a bridge pier under ice-jammed flow condition – an experimental study

Journal of Hydrology and Hydromechanics, 2021
The appearance of an ice jam in a river crucially distorts local hydrodynamic conditions including water level, flow velocity, riverbed form and local scour processes.
Wang Jun, Hou Zhixing, Sun Hongjian, Fang Bihe, Sui Jueyi, Karney Bryan   +5 more
doaj   +1 more source

Evaluation of local scour around bridge piers for various geometrical shapes using mathematical models

Ain Shams Engineering Journal, 2018
Bridges are one of the important structures across the Nile River; these bridges may be subjected to collapse if there is no monitoring or safety precaution for local scour during high floods.
Ahmed Moustafa Ahmed Moussa
doaj   +1 more source

Localized Turbulent Flows on Scouring Granular Beds [PDF]

Physical Review Letters, 2005
In many applications a sustained, localized turbulent flow scours a cohesionless granular bed to form a pothole. Here we use similarity methods to derive a theoretical formula for the equilibrium depth of the pothole. Whereas the empirical formulas customarily used in applications contain numerous free exponents, the theoretical formula contains a ...
Gioia, Gustavo, Bombardelli, Fabian A.
openaire   +3 more sources

Experimental and numerical investigation into the local scour of bridge cofferdam with anti-scour ribs

Advances in Bridge Engineering
Cofferdam is widely employed in the construction of underwater bridge foundations. Its crucial attribute lies in providing a dedicated platform for construction activities and enhancing the water resistance dimensions in structural design, consequently ...
Pengxin Ran, Kai Wei, Bike Zhang, Lu Wang, Ruihua Nie, Yongle Li   +5 more
doaj   +1 more source

Laboratory Study of Local Scour Around an Array of Pile Groups in Clear-Water Scour Conditions

Journal of Marine Science and Engineering
Current-induced local scour around pile groups weakens the capacity of structures. In this paper, experimental tests of local scour around an array of 5 × 5 pile groups were conducted in a steady current in a hydraulic flume.
Ming Gong, Xinying Pan, Shengtao Du, Guoxiang Wu, Yingxue Lv, Yunjia Sun, Guangjia Ding, Bingchen Liang   +7 more
doaj   +1 more source

Experimental investigation of local scour around multi-vents bridge piers

Alexandria Engineering Journal, 2015
The harmful effect of local scour around bridge piers and abutments can induce high maintenance costs or even bridge collapse resulting in the disturbance of traffic and possibly human losses.
Yasser A. Mohammed, Yasser K. Saleh, Abdel-Azim M. Ali   +2 more
doaj   +1 more source

Efficient Adsorption‐Based Direct Air Capture Via Triply Periodic Minimal Surface Architectures

Advanced Science, EarlyView.
Architected triply periodic minimal surface (TPMS) contactors reshape direct air capture by replacing straight‐channel diffusion limits with convection‐enhanced CO2 transport. Chaotic advection thins boundary layers and exposes fast adsorption sites, enabling 70%–75% more fast sites, 114% higher productivity, and 51.8% lower energy consumption than ...
Qingyang Shao, Zhuozhen Gan, Chengcheng Long, Man Zhang, Yihe Miao, Yuehui Li, Xuancan Zhu   +6 more
wiley   +1 more source

Evolution features of riverbeds near underwater crossing line pipes: An experimental study

Natural Gas Industry B, 2020
It is of important significance to study the evolution law of the riverbed near underwater crossing line pipes for ensuring the safe operation of oil and gas pipelines and reducing the risk of damage by water flood disasters.
Qian Yang, Mingnan Sun, Mo He, Qinghua Yang   +3 more
doaj   +1 more source