Mesoscale Analysis of Hydraulics.
| Main Author: | |
|---|---|
| Format: | eBook |
| Language: | English |
| Published: |
Singapore :
Springer Singapore Pte. Limited,
2020.
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| Edition: | 1st ed. |
| Subjects: | |
| Online Access: | Click to View |
Table of Contents:
- Intro
- Foreword I
- Foreword II
- Acknowledgments
- Contents
- About the Author
- List of Main Symbols
- List of Main Acronyms
- 1 Introduction
- 1.1 Definition of Mesoscale
- 1.2 Necessity of Mesoscale Research
- 1.3 Main Contents of Mesoscale Research
- References
- 2 Mesoscale Analysis of Cavitation and Cavitation Erosion
- 2.1 Background
- 2.2 Interactions Between Cavitation Bubbles and Rigid Boundaries
- 2.2.1 Shock Waves and Microjets Generated from the Collapse of CBs
- 2.2.2 Effects of the Geometric Shape of a Boundary on the Collapse Behavior of a CB
- 2.3 Interactions Between Cavitation Bubbles and Elastic Boundaries
- 2.3.1 Morphology of CBs Near Elastic Boundaries During the Collapsing Process
- 2.3.2 Shock Waves Generated by CBs Near Elastic Boundaries When Collapsing
- 2.3.3 Cavitation Erosion Resistance of Elastic Materials
- 2.4 Interactions Between Cavitation Bubbles
- 2.4.1 Interactions Between Two CBs
- 2.4.2 Interactions Between Multiple CBs
- 2.5 Interactions Between Cavitation Bubbles and Particles
- 2.5.1 Effects of Particles on the Collapse Directions of CBs
- 2.5.2 Effects of a Particle on the Shock Wave Generated by a CB When Collapsing
- 2.5.3 Effects of Particles on Cavitation Erosion
- 2.6 Collapse Locations of Cavitation Bubbles and Cavitation Erosion Control in Engineering Practice
- 2.6.1 Collapse Location Distribution Pattern of CBs in a Flow Past a Convex Body
- 2.6.2 Relationship of the Collapse Locations of CBs in a Flow Past a Convex Body with the Flow Field
- 2.6.3 Critical Conditions Required for Near-Boundary Collapse of CBs in a Flow Past a Convex Body
- 2.7 Conclusions
- References
- 3 Mesoscale Analysis of Aeration for Cavitation Erosion Protection
- 3.1 Background
- 3.2 Attenuation Effect of Air Bubbles on the Collapse Intensity of Cavitation Bubbles.
- 3.2.1 Intensity of the Collapse Noise of a Cavitation Bubble Interacting But Not Connected with Air Bubbles
- 3.2.2 Intensity of the Collapse Noise of a Cavitation Bubble Interacting and Connected with an Air Bubble
- 3.3 Direction-Changing Effect of an Air Bubble on the Collapse of a Cavitation Bubble
- 3.3.1 Direction-Changing Effect of an Air Bubble on the Collapse of a Cavitation Bubble
- 3.3.2 Direction-Changing Effect of an Air Bubble on a Cavitation Bubble Evolving Near a Wall
- 3.3.3 Combined Direction-Changing Effects of a Wall and an Air Bubble on the Collapse of a Cavitation Bubble
- 3.4 Retarding Effect of an Air Bubble on the Collapse Shock Wave of a Cavitation Bubble
- 3.4.1 Retarding Effect of an Air Bubble on the Collapse Shock Wave of a Cavitation Bubble
- 3.4.2 Impact Intensity of the Collapse Shock Wave of a Cavitation Bubble Interacting with an Air Bubble Near a Wall
- 3.5 Forced Aeration for Cavitation Erosion Protection of High-Head Dams
- 3.5.1 Mesoscale Mechanism of Forced Aeration
- 3.5.2 Design Principles of Forced-Aeration for Cavitation Erosion Protection Structures of High-Head Dams
- 3.6 Conclusions
- References
- 4 Mesoscale Analysis of Air-Water Two-Phase Flow
- 4.1 Background
- 4.2 Mesoscale Mechanism for Surface Aeration of High-Velocity Flows
- 4.2.1 Mesoscale Characteristics of the Free-Surface Shape of Flows
- 4.2.2 Mesoscale Free-Surface Aeration Process of Flows
- 4.2.3 Quantitative Analysis of the Free-Surface Aeration of Flows
- 4.3 Critical Condition for Surface Aeration of High-Velocity Flows
- 4.3.1 Critical Condition for Air Entrainment of Free-Surface Depressions in Flows
- 4.3.2 Air-Bubble Entrainment Characteristics of Free-Surface Depressions in Flows
- 4.3.3 Comparison of Calculated and Experimental Results.
- 4.4 Calculation of Concentration Distribution for Surface Aeration of High-Velocity Flows
- 4.4.1 Regional Characteristics of Surface Aeration in High-Velocity Flows
- 4.4.2 Comparison of the Calculated and Measured Values of the Ca Distribution in High-Velocity Aerated Flows
- 4.4.3 Diffusion Pattern of Ca Along the Course
- 4.5 Analysis of Depth and Concentration of Aerated Flows in Engineering Practice
- 4.5.1 Analysis of Self-Aerated Open-Channel Flows in Terms of Hm
- 4.5.2 Analysis of the Aerated Flow in the Spillway of the Jinping-I Hydropower Station
- 4.6 Conclusions
- References
- 5 Mesoscale Analysis of Flood Discharge and Energy Dissipation
- 5.1 Background
- 5.2 Vortex Structure of a Single Jet
- 5.2.1 Velocity Field Characteristics of a Single Jet
- 5.2.2 Vorticity Field Characteristics of a Single Jet
- 5.3 Vortex Structure with Multijets
- 5.3.1 Transverse Vortices
- 5.3.2 Vertical Vortices
- 5.4 Vortex Structure of a Pressure Flow with a Sudden Contraction
- 5.4.1 Flow Field Characteristics of a Pressure Flow with a Sudden Contraction
- 5.4.2 Vortex Blob Characteristics of a Pressure Flow with a Sudden Contraction
- 5.5 Application of Multihorizontal Submerged Jets in Engineering Project
- 5.5.1 Overview of the Project
- 5.5.2 Characteristics of the Flood Discharge and Energy Dissipation
- 5.6 Conclusions
- References
- 6 Mesoscale Analysis of Flood Discharge Atomization
- 6.1 Background
- 6.2 Jet Spallation in Air
- 6.2.1 Velocity Distribution of Jet-Spalled Water Droplets
- 6.2.2 Distribution of the Moving Directions of the Water Droplets Formed by Jet Spallation
- 6.3 Jet Collision in Air
- 6.3.1 Characteristics of the Water Droplets Formed by a Jet Collision in Air
- 6.3.2 Effects of the Flow-Rate Ratio on the Characteristics of the Water Droplets Formed by a Jet Collision.
- 6.3.3 Spallation Area of Jets After Collision in Air
- 6.4 Water Splash by Plunging Jets
- 6.4.1 Characteristics of the Water Droplets Splashed by a Jet
- 6.4.2 Motion Pattern of the Water Droplets Formed by the Splashing of Water with a High-Velocity Plunging Jet
- 6.5 Discussion of the Scale Effect in Flood Discharge Atomization Model Tests for High-Head Dams
- 6.5.1 Similarity Criterion for FDA Model Tests
- 6.5.2 Scale Effect in FDA Model Tests
- 6.6 Conclusions
- References
- 7 Mesoscale Analysis of Flash Flood and Sediment Disasters
- 7.1 Background
- 7.2 Sudden Stop and Accumulation of Sediment Particles After a Hydraulic Jump
- 7.3 Threshold Conditions for Combined Flash Flood and Sediment Disasters
- 7.4 Identification of Disaster-Prone Regions Based on the Threshold Conditions for Combined Flash Flood and Sediment Disasters
- 7.5 Analysis of Control Techniques Based on the Threshold Conditions for Combined Flash Flood and Sediment Disasters
- 7.6 Conclusions
- References.