Publication

Influence of a circular jet arrangement in a rectangular tank on flow and suspended sediment release

Jolanda Maria Isabella Jenzer Althaus
2011
Conference Papers

Abstract

With the objective of high sediment release out of a rectangular tank the performance of a circular jet arrangement has been investigated. Therefore, experiments with four jets arranged in a horizontal circle placed in water with quasi homogeneous sediment concentration were conducted. The induced circulation was analysed by measuring the flow field. The influence of the flow circulation on suspension and on sediment release through the water intake was studied and discussed. The offbottom clearance of the jet arrangement, the water intake height as well as the discharge of the jets was varied. Thus, the optimal parameter combination regarding sediment release was identified. The results of this study allow giving recommendation on best installation and discharge practice of the jets resulting in high sediment release. This jet mixing method can be applied in real reservoirs when fighting against sedimentation.

Official source

https://infoscience.epfl.ch/entities/publication/bf68fcfa-08ae-4da7-9584-0c1e6bf0ebb1

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Jolanda Maria Isabella Jenzer Althaus
2011
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/bf68fcfa-08ae-4da7-9584-0c1e6bf0ebb1

About this result

Related concepts (32)

Potential flow

In fluid dynamics, potential flow (or ideal flow) describes the velocity field as the gradient of a scalar function: the velocity potential. As a result, a potential flow is characterized by an irrotational velocity field, which is a valid approximation for several applications. The irrotationality of a potential flow is due to the curl of the gradient of a scalar always being equal to zero. In the case of an incompressible flow the velocity potential satisfies Laplace's equation, and potential theory is applicable.

Jet engine

A jet engine is a type of reaction engine, discharging a fast-moving jet of heated gas (usually air) that generates thrust by jet propulsion. While this broad definition may include rocket, water jet, and hybrid propulsion, the term typically refers to an internal combustion air-breathing jet engine such as a turbojet, turbofan, ramjet, or pulse jet. In general, jet engines are internal combustion engines.

Circulation (physics)

In physics, circulation is the line integral of a vector field around a closed curve. In fluid dynamics, the field is the fluid velocity field. In electrodynamics, it can be the electric or the magnetic field. Circulation was first used independently by Frederick Lanchester, Martin Kutta and Nikolay Zhukovsky. It is usually denoted Γ (Greek uppercase gamma). If V is a vector field and dl is a vector representing the differential length of a small element of a defined curve, the contribution of that differential length to circulation is dΓ: Here, θ is the angle between the vectors V and dl.

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Influence of a circular jet arrangement in a rectangular tank on flow and suspended sediment release

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