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Roll waves evolution in high gradient channels to a non-Newtonian rheology
(2002-12-01)
The criteria for the occurrence of roll wave phenomenon in the supercritical and turbulent Newtonian and non-Newtonian flows from the engineering point of view was analyzed. Imposing a constant discharge at the upstream ...
Roll waves evolution in high gradient channels to a non-Newtonian rheology
(2002-12-01)
The criteria for the occurrence of roll wave phenomenon in the supercritical and turbulent Newtonian and non-Newtonian flows from the engineering point of view was analyzed. Imposing a constant discharge at the upstream ...
Roll waves and their generation criteria
(Assoc Brasileira Recursos Hidricos-abrh, 2021-01-01)
Pulsating waves (also known as roll waves) might occur on the free surface of extreme events like mud and debris flows, among others, usually intensifying the caused damage. This technical note aims to inform about the ...
Experimental setup for measuring roll waves on laminar open channel flows
(Elsevier B.V., 2015-03-01)
Experimental studies on open channel flows are explored mostly because of their importance in validating analytical and numerical models. Although steady flows are usually measured and explored, difficulties arise in the ...
Numerical analysis of roll waves generation on non-Newtonian fluids flowing down an inclined plane
(2014-01-01)
This article aims to determine roll waves generation criteria for mudflow events. A representative system of equations to mudflows is reached through Cauchy's equations (mass and momentum conservation) with proper stress ...
Roll-Waves Mathematical Model as a Risk-Assessment Tool: Case Study of Acquabona Catchment
(Asce-amer Soc Civil Engineers, 2018-12-01)
In an attempt to develop risk-assessment engineering tools, a method is presented that involves the application of a simplified model that represents periodic permanent roll waves in Herschel-Bulkley laminar fluid flows. ...
Digital image correlation applied to the calculation of the out-of-plane deformation induced by the formation of roll waves in a non-Newtonian fluid
(Spie-Soc Photo-Optical Instrumentation Engineers, 2016)
A method based on digital image correlation (DIC) is implemented for measuring the height of the roll waves developed in a non-Newtonian fluid flowing on an inclined channel. A projector and a high-resolution digital camera, ...
Experimental setup for measuring roll waves on laminar open channel flows
(Elsevier B.V., 2015)
Experimental Apparatus for Roll-Wave Measurements and Comparison with a 1D Mathematical Model
(Asce-amer Soc Civil Engineers, 2017-11-01)
An experimental approach to examine the instabilities present on free surfaces of non-Newtonian fluid flow occurring in inclined channels is presented. When these flows occur in favorable conditions of inclination and ...