One-dimensional numerical modelling of dam-break waves over movable beds: application to experimental and field cases

Abstract A new method is developed to calculate characteristics of contaminant transport (including non-classical regimes) in statistically homogeneous sharply contrasting media. A transport integro-differential equation in the space-time representation is formulated on the basis of the model earlier proposed by one of the authors (L. M.). Analytical expressions for transport characteristics in limiting time intervals in the one-dimensional case are derived. An interpolation form is proposed for the integral kernel of the transport equation. On a basis of this expression, an algorithm is developed for numerical modelling the contaminant transport in statistically homogeneous sharply contrasting media. Trial numerical 1D calculations are performed based on this algorithm. Good agreement was found between the numerical simulation results and the asymptotic analytical expressions.

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Flood inundation numerical modelling due to dam break of Way Sekampung Dam

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/930/1/012029 ◽

2020 ◽

Vol 930 ◽

pp. 012029

Author(s):

Z. Nadida ◽

U Lasminto

Keyword(s):

Numerical Modelling ◽

Dam Break ◽

Flood Inundation

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One-Dimensional Dam-Break Solutions for Variable Width Channels

Journal of Hydraulic Engineering ◽

10.1061/(asce)0733-9429(1997)123:5(464) ◽

1997 ◽

Vol 123 (5) ◽

pp. 464-468 ◽

Cited By ~ 11

Author(s):

F. E. Hicks ◽

P. M. Steffler ◽

N. Yasmin

Keyword(s):

Dam Break ◽

One Dimensional

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Numerical Modelling in Turbines for OWC Systems: Application to a Radial Impulse

29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 3 ◽

10.1115/omae2010-20460 ◽

2010 ◽

Author(s):

Juan G. Gonza´lez ◽

Bruno Pereiras ◽

Francisco Castro ◽

Miguel A. Rodri´guez

Keyword(s):

Experimental Data ◽

Numerical Modelling ◽

Cfd Analysis ◽

Oscillating Water Column ◽

Impulse Turbine ◽

One Dimensional ◽

Directional Flow ◽

Axial Turbines ◽

D Model ◽

Reaction Degree

This work is focused on radial impulse turbines for an Oscillating Water Column (OWC) which is one of the alternatives to the Wells turbines traditionally installed in the OWC systems. All self-rectifying turbines work under special conditions due to the bi-directional flow caused by OWC. But a radial impulse turbine has another special point: it works alternatively as an inflow/outflow turbine, so that its behavior is not symmetrical as is expected in axial turbines for OWC (Wells and axial impulse turbines). The complete CFD analysis we have made of a radial impulse turbine is described. The model was created for a specific turbine but can be adapted for any self-rectifying turbine. We have studied the turbine by means of a one-dimensional study and a 3-D model solved with FLUENT® software, and the results were validated with experimental data extracted from the bibliography. This model allowed us to analyse both the classical dimensionless parameters and the flow pattern. Moreover, we have introduced a special definition for the reaction degree in order to analyse the process of the energy conversion.

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