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Estudio del resalto hidráulico y su aplicación en cuencos amortiguadores a través de modelación física y numérica Juan Francisco Macián Pérez 1

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PowerPoint Presentationcuencos amortiguadores a través de
modelación física y numérica
Juan Francisco Macián Pérez
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins
1. Introduction
5. Typified USBR II stilling basin
6. Conclusions
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 3
Introduction
Background
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 4
Introduction
Large-Dams
• Economic and social interest
• Critical consequences derived from
scenarios
flood protection
Existing dams must deal with larger discharges than those considered in their original design
Background
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 5
Introduction
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 6
Introduction

techniques
Modelling a representative case study with limited scale effects provides an adequate
extrapolation to real-life applications
• Froude number: 1 = 1
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 7
Introduction
hydraulic jump phenomenon
• Characterisation of the classical
basin
The research aims at contributing to the general knowledge of the hydraulic jump phenomenon and
its application for energy dissipation purposes in large-dam stilling basins
2. NUMERICAL MODELLING
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 8
Numerical modelling
General Settings
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 9
Numerical modelling
Flow governing
that reproduce the turbulence
(Boussinesq hypothesis)
Turbulence Modelling
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 10
Numerical modelling
Two-equation turbulence
of flows
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 11
Numerical modelling
Volume Of Fluid (VOF)
Method Definition of a Fraction of Fluid function () for each cell
• =1: Cell completely filled with
water
and 1 contain free surface
• Advection method to track the
evolution of the free surface
• Free surface refinement
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 12
Numerical modelling
Mesh
convergence
• Cell refinement of regions with complex
geometry/potentially higher flow gradients
3. PHYSICAL MODELLING
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 13
Physical modelling
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 14
Physical modelling
USBR II
Instrumentation
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 15
Physical modelling
Digital Image
Processing (DIP)
(LIDAR)
Instrumentation
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 16
Physical modelling
Pitot Tube
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 17
Physical modelling
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 18
Physical modelling
Hydraulic Jump
Feature Instrumentation
Void fraction
4. CLASSICAL HYDRAULIC JUMP
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 19
Classical Hydraulic Jump (CHJ) Analysis
Free Surface Profile
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 20
Classical Hydraulic Jump (CHJ) Analysis
Dimensionless Free
Surface Profile
DIP Bakhmeteff & Matzke [39] Wang & Chanson [8]
FLOW-3D® 0.943 0.991 0.956
OpenFOAM 0.961 0.996 0.996
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 21
Classical Hydraulic Jump (CHJ) Analysis
Velocity Distribution in the Roller Region
Maximum Forward Velocity Decay Maximum Backwards Velocity
= − 2 1 − 2
= 2
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 22
Classical Hydraulic Jump (CHJ) Analysis
Velocity Distribution in
the Roller Region
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 23
Classical Hydraulic Jump (CHJ) Analysis
Average relative pressures along the
longitudinal axis
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 24
Typified USBR II Stilling Basin Analysis
Free Surface Profile
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 25
Typified USBR II Stilling Basin Analysis
Dimensionless Free Surface Profile
= − 0
Velocity Profiles
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 26
Typified USBR II Stilling Basin Analysis
Velocity Distribution
Numerical and physical
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 27
Typified USBR II Stilling Basin Analysis
Velocity Distribution in the Roller Region Streamwise Velocity Vertical Profiles
General good agreement
models
ExperimentalNumerical
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 28
Typified USBR II Stilling Basin Analysis
Formulation
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 29
Typified USBR II Stilling Basin Analysis
Lower Region Analysis
= × (−/1)
bibliographic information
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 30
Typified USBR II Stilling Basin Analysis
Upper Region Analysis
to the toe
along the hydraulic jump
coefficient values in accordance
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 31
Conclusions
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 32
Conclusions
some internal features
• Codes benchmarking importance
• Performance of traditional instrumentation and potential of innovative techniques
• Available resources and appropriate extrapolation to prototype scale
Complementary nature
Numerical and Physical Modelling Approaches to the Study of the
Hydraulic Jump and its Application in Large-Dam Stilling Basins 33
Conclusions
• Complexity of the phenomenon. Contributions to current knowledge
• Complete study of the hydraulic jump. Interaction of the different processes involved
• Multiple features and techniques approached under a unique study
• Relatively reduced bibliographic information despite its practical interest
• Step forward to build an extended database for the study of typified stilling basins
• Influence of the energy dissipation devices on the hydraulic jump properties
Typified USBR II Stilling Basin
Numerical and Physical Modelling Approaches
to the Study of the Hydraulic Jump and its
Application in Large-Dam Stilling Basins
Juan Francisco Macián Pérez