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How to simulate quickly and efficiently a flow over a spillway ?
Goffin, Louis; Erpicum, Sébastien; Dewals, Benjamin et al.
20145th International Junior Researcher and Engineer Workshop on Hydraulic Structures
 

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Keywords :
free surface; spillway flow; Laplace; surface tracking; boundary conditions; curvilinear coordinates
Abstract :
[en] Flows over hydraulic structures, such as weirs or spillways, can be modelled using different techniques. New models such as SPH or PFEM are becoming more and more popular. These models are particle and/or meshless and consequently require a lot of computational power. Other methods such as VOF also require a lot of computational time. In the frame of 2-D vertical flows, other techniques use much less computation time. For irrotationnal flows, solving the Laplace equation can be done very efficiently. The difficulty of this method lies in the definition of boundary conditions. The free-surface, which is naturally determined when using Lagrangian methods, needs a heavy iterative solving due to its non-linear nature when expressed in the frame of the Laplace equation. This paper will present an original technique that allows a quicker and easier determination of the free-surface. An irregular mesh for boundaries is used and discussed. The method is validated with analytical solutions and experimental measurements.
Research center :
UEE - Urban and Environmental Engineering - ULiège
Disciplines :
Civil engineering
Author, co-author :
Goffin, Louis ;  Université de Liège - ULiège > Département ArGEnCo > HECE (Hydraulics in Environnemental and Civil Engineering)
Erpicum, Sébastien  ;  Université de Liège - ULiège > Scientifiques attachés au Doyen (Sc.appliquées)
Dewals, Benjamin  ;  Université de Liège - ULiège > Département ArGEnCo > Hydraulics in Environmental and Civil Engineering
Pirotton, Michel ;  Université de Liège - ULiège > Département ArGEnCo > HECE (Hydraulics in Environnemental and Civil Engineering)
Archambeau, Pierre  ;  Université de Liège - ULiège > Département ArGEnCo > HECE (Hydraulics in Environnemental and Civil Engineering)
Language :
English
Title :
How to simulate quickly and efficiently a flow over a spillway ?
Publication date :
August 2014
Event name :
5th International Junior Researcher and Engineer Workshop on Hydraulic Structures
Event organizer :
Université de Lège
Event place :
Spa, Belgium
Event date :
du 28 aout 2014 au 30 aout 2014
Audience :
International
Available on ORBi :
since 02 June 2014

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