THE ROLE OF EROSION AT THE HEAD OF SUSPENSION CURRENTS EXPERIMENT AND THEORY C.S. Carroll, B. Turnbull, M.Y. Louge and E.A. Cowen School of Mechanical.

Slides:

Advertisements

Similar presentations

Flow Regime and Sedimentary Structures

Advertisements

Basic Governing Differential Equations

The Bernoulli Equation - Work and Energy

Frontal Dynamics of Powder Snow Avalanches Cian Carroll, Barbara Turnbull and Michel Louge EGU General Assembly, Vienna, April 27, 2012 Sponsored by ACS.

Fluid Mechanics 10.

Fluid Dynamics.

CE 230-Engineering Fluid Mechanics Lecture # 4and5 Fluid properties (2)

Fluid Mechanics –For Civil Engineers is all about SMU Storing– Moving– Using ( Incompressible fluids - water) To design and manage these systems we need.

CE 230-Engineering Fluid Mechanics Lecture # 18 CONTINUITY EQUATION Section 5.3 (p.154) in text.

1 MAE 5130: VISCOUS FLOWS Momentum Equation: The Navier-Stokes Equations, Part 1 September 7, 2010 Mechanical and Aerospace Engineering Department Florida.

Motion of Fluid Particles, An Essential Need of Humans…… P M V Subbarao Professor Mechanical Engineering Department I I T Delhi Kinematics of Viscous.

Fluid Flow. Pressure Force  Each volume element in a fluid is subject to force due to pressure. Assume a rectangular boxAssume a rectangular box Pressure.

Suspended Load Above certain critical shear stress conditions, sediment particles are maintained in suspension by the exchange of momentum from the fluid.

1 MAE 5130: VISCOUS FLOWS Stokes’ 1 st and 2 nd Problems Comments from Section 3-5 October 21, 2010 Mechanical and Aerospace Engineering Department Florida.

DIFFERENTIAL MANOMETER

From RegentsEarth.com win.

CHAPTER 6 MOMENTUM PRINCIPLE Dr. Ercan Kahya Engineering Fluid Mechanics 8/E by Crowe, Elger, and Roberson Copyright © 2005 by John Wiley & Sons, Inc.

SURVIVAL MODE Quiz 3 –

Conservation of Mass D=Domain of a body of water Water is flowing in and out of D Mass is neither created nor destroyed Flow coming in = Flow going out.

Modelling of the particle suspension in turbulent pipe flow

Basic dynamics  The equations of motion and continuity Scaling Hydrostatic relation Boussinesq approximation  Geostrophic balance in ocean’s interior.

Methods A predictive method will be developed from NBSS measurements and vegetation/channel properties from the flume data. The predictive method will.

© Cambridge University Press 2010 Brian J. Kirby, PhD Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY Powerpoint.

Plasma Dynamics Lab HIBP E ~ 0 V/m in Locked Discharges Average potential ~ 580 V  ~ V less than in standard rotating plasmas Drop in potential.

Alternative derivation of Sverdrup Relation Construct vorticity equation from geostrophic balance (1) (2)  Integrating over the whole ocean depth, we.

CE 230-Engineering Fluid Mechanics Week 1 Introduction.

LECTURE 8 LAYER-AVERAGED GOVERNING EQUATIONS FOR TURBIDITY CURRENTS

© Cambridge University Press 2010 Brian J. Kirby, PhD Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY Powerpoint.

Flow Energy PE + KE = constant between any two points  PE (loss) =  KE (gain) Rivers are non-conservative; some energy is lost from the system and can.

Prof. dr. A. Achterberg, Astronomical Dept., IMAPP, Radboud Universiteit.

For a rotating solid object, the vorticity is two times of its angular velocity Vorticity In physical oceanography, we deal mostly with the vertical component.

Powerpoint Slides to Accompany Micro- and Nanoscale Fluid Mechanics: Transport in Microfluidic Devices Chapter 6 Brian J. Kirby, PhD Sibley School of.

For a rotating solid object, the vorticity is two times of its angular velocity Vorticity In physical oceanography, we deal mostly with the vertical component.

MAE 4262: ROCKETS AND MISSION ANALYSIS Conservation Equations and Examples Mechanical and Aerospace Engineering Department Florida Institute of Technology.

Open Channel Hydraulics Specific Energy & Discharge Control Structures Environmental Hydrology Lecture 13.

© Cambridge University Press 2010 Brian J. Kirby, PhD Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY Powerpoint.

Dr. Jason Roney Mechanical and Aerospace Engineering

Reference Book is. 2. The flow is steady. In steady (laminar) flow, the velocity of the fluid at each point remains constant. Fluid DYNAMICS Because the.

MAE 5360: Hypersonic Airbreathing Engines

MAE 3241: AERODYNAMICS AND FLIGHT MECHANICS Introduction to Streamlines, Stream Functions, and Velocity Potential January 28, 2011 Mechanical and Aerospace.

According to the graph, what particle diameter corresponds to a stream velocity of 10 cm / sec ? About 0.2 cm.

Aeolian Environments Navajo Sandstone (Jurassic, Utah)Sahara Desert.

CP502 Advanced Fluid Mechanics

Erosion and Transportation

Prof. dr. A. Achterberg, Astronomical Dept., IMAPP, Radboud Universiteit.

Fluid Mechanics (C.V. analysis) Dept. of Experimental Orthopaedics and Biomechanics Bioengineering Reza Abedian (M.Sc.)

Sverdrup, Stommel, and Munk Theories of the Gulf Stream

Continuum Mechanics (MTH487)

Supplemental Learning Module Introduction to Lift and Drag

Expression Session Summarise “stream discharge” and “river load” using diagrams to assist your answer.

Solid, Liquid, Gas.

Erosion of Weathered materials

CFD – Fluid Dynamics Equations

MAE 4261: AIR-BREATHING ENGINES

Combustion of Methane in Countercurrent Shear Layers

Kinetic Theory.

MAE 4262: Rockets and Mission Analysis

Mechanical Separation

Rivers and Streams.

Fluid properties 1.

Kinetic Theory.

Introduction to Food Engineering

Streams and Drainage Systems

Multiscale Modeling of Flood-Induced Surface Erosion in a Particle Bed

5. Describing Flow CH EN 374: Fluid Mechanics.

Rivers and Streams.

Dept of Mechanical Engineering

 More Fluids  November 30,  More Fluids  November 30, 2010.

WRF plume modelling update NCAS, Leeds

CN2122 / CN2122E Fluid Mechanics

Presentation transcript:

THE ROLE OF EROSION AT THE HEAD OF SUSPENSION CURRENTS EXPERIMENT AND THEORY C.S. Carroll, B. Turnbull, M.Y. Louge and E.A. Cowen School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853 Suspension currents are sustained by entrainment of particles from the bed. Recent measurements show a narrow intense source of momentum within the head. We carry out a density perturbation to the underlying potential flow, test our results versus experiments and, by examining pressure gradients induced in the snowpack, calculate the failure depth based on the derived stresses. Figure A illustrates the agreement between our density perturbation theory and water flume experiments. Figure B is an enlarged view near the source showing velocity vectors in the avalanche rest frame of dense particle-laden fluid ejected from the snowpack and entrained into the powder cloud. Separatrix Ambient Uniform Stream Source Fluid Source A B