Results 121 to 130 of about 269 (147)

Profile of Keith Moffatt. [PDF]

Proc Natl Acad Sci U S A, 2014
Ahmed F.
europepmc   +1 more source

What Is the Heart? Anatomy, Function, Pathophysiology, and Misconceptions. [PDF]

J Cardiovasc Dev Dis, 2018
Buckberg GD, Nanda NC, Nguyen C, Kocica MJ.   +3 more
europepmc   +1 more source

Coexistence of Lactic Acid Bacteria and Potential Spoilage Microbiota in a Dairy Processing Environment. [PDF]

Appl Environ Microbiol, 2015
Stellato G, De Filippis F, La Storia A, Ercolini D.   +3 more
europepmc   +1 more source

Monitoring benthic plumes, sediment redeposition and seafloor imprints caused by deep-sea polymetallic nodule mining. [PDF]

Nat Commun
Gazis IZ, de Stigter H, Mohrmann J, Heger K, Diaz M, Gillard B, Baeye M, Veloso-Alarcón ME, Purkiani K, Haeckel M, Vink A, Thomsen L, Greinert J.   +12 more
europepmc   +1 more source

Optimization of axial water injection to mitigate the Rotating Vortex Rope in a Francis turbine

Renewable Energy, 2021
Abstract Rotating Vortex Rope (RVR) resulting from flow instabilities inside draft tube affects the hydraulic turbine's efficiency and wear. Among the passive and active RVR mitigation methods, the water injection method has been widely investigated lately.
Reza Maddahian, Michel J Cervantes
exaly   +3 more sources

Investigation of Rotating Vortex Rope formation during load variation in a Francis turbine draft tube

Renewable Energy, 2020
Abstract Rotating Vortex Rope (RVR) has been a matter of focus for years due to the major effects on hydraulic turbine’s efficiency. The exact procedure of RVR formation is still vague. The present research focuses on the dynamics of the RVR formation during the load variation employing transient numerical simulations.
Nahale Sotoudeh, Reza Maddahian, Michel J Cervantes   +2 more
exaly   +3 more sources

Numerical Simulation of the Rotating Vortex Rope with Code_Saturne

2019 International Conference on ENERGY and ENVIRONMENT (CIEM), 2019
The paper presents numerical simulations of the rotating vortex rope (RVR) inside a Francis turbine draft tube. The computational fluid dynamics (CFD) calculations were carried out using the Code_Saturne software. The geometry of the turbine was obtained from the Francis-99 workshops. The mesh files provided for the Francis-99 workshop II were modified
Robert Mitrut, Diana Maria Bucur, Georgiana Dunca, Michel J. Cervantes   +3 more
core   +3 more sources

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Rotating vortex rope formation and mitigation in draft tube of hydro turbines – A review from experimental perspective

Renewable and Sustainable Energy Reviews, 2021
Abstract Hydropower is a clean and renewable source of energy which is widely used to generate electric power and stabilize the power grid. It can respond quickly to any change in demand with the flexibility to operate over a wide range of time scales.
Michel J Cervantes, Bhupendra K Gandhi
exaly   +2 more sources

Experimental investigation of vortex rope mitigation in a 10 MW axial turbine

Renewable Energy
Increased utilization of hydraulic turbines as a regulatory tool for electrical grid stabilization forces some turbines to operate away from their design point, thus increasing wear and tear.
Michel J Cervantes
exaly   +2 more sources