We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byCassandra Gillott
Modified over 2 years ago
Laminar and Turbulent Flow
Reynolds Number (Re) Laminar Re 4000
Turbulence is significant in: conduction of heat (eddy conduction) diffusion of dissolved substances (eddy diffusion) viscosity (eddy viscosity)
Deep Water Wave
Water Movement in a Surface Wave
Shallow Water Waves
Whitecaps on Lake Michigan
Causes of Surface Currents Wind Change in atmospheric pressure Horizontal density gradients Influx of water
Surface Currents in Lake Erie
Rip Current in Lake Erie
Currents in a Stratified Lake Layers remain stable if the shearing force between them is low; Richardson number (Ri) remains higher than 0.25.
Coriolis Effect on water movement
Formation of a Seiche
Seiche on Lake Erie
Seiche traces from different parts of Lake Huron
Inflow and outflow in Galich Lake
Lake Sam Reyburn, TX
Richardson number = shearing force between layers From Fernandez and Imberger (2006)
Table 7-1 Velocity (cm/sec)SubstrateDiameter range (mm) 3-20Silt, mud, organic debris<0.02 20-40Fine sand0.1 - 0.3 40-60Coarse sand to fine gravel0.5 – 8 60-120Small - large gravel8 – 64 120-200Large cobbles to boulders>128
Movement of Water in a Stream Channel
Run and Riffle
Standing Wave in Stream
Standing waves on the Colorado River in the Grand Canyon
Discharge and Gage Height
RiversReservoirsNatural Lakes Water-level Fluctuations Large, rapid, irregular; flooding Large, irregularSmall, stable InflowRunoff from surface irregular and seasonal; groundwater stable From river and tributaries; internal flows complex From low order streams, groundwater OutflowDischarge irregularHighly irregularStable; outflow shallow and groundwater Flushing RateRapid, unidirectional, horizontal Short, variable (weeks) Long, years
Lecture Goals To present the external and internal physical processes that determine how water moves in lakes and streams. To discuss some of the important.
Momentum Equations in a Fluid (PD) Pressure difference (Co) Coriolis Force (Fr) Friction Total Force acting on a body = mass times its acceleration (W)
Laminar flow Also known as streamline flow Occurs when the fluid flows in parallel layers, with no disruption between the layers The opposite of turbulent.
Water movements Announcements Canoe trip Tuesday's lab: pick up syllabus Today: Last week's Q of the day Water movements Brainstorming independent project.
Laminar flow, turbulent flow and Reynold’s number
Water Movements. Transfer of wind energy to water Modified by gravity, basin morphometry and differential water densities to produce characteristic.
Transport in Aquatic Ecosystems Horizontal Inflows - Advection Turbulence – critical for vertical fluxes.
0.1m 10 m 1 km Roughness Layer Surface Layer Planetary Boundary Layer Troposphere Stratosphere height The Atmospheric (or Planetary) Boundary Layer is.
Lecture 7: The Oceans (1) EarthsClimate_Web_Chapter.pdfEarthsClimate_Web_Chapter.pdf, p
Fluid Dynamics Stream Ecosystems. Fluid Dynamics Lecture Plan First consider fluids, stress relationships and fluid types Then consider factors affecting.
INTRODUCTION TO CONVECTION
Atmospheric Analysis Lecture 3.
The thermocline occurs deeper in large lakes because wind energy is transmitted to greater depths Wind energy increases with fetch In small lakes convection.
Conservation of Salt: Conservation of Heat: Equation of State: Conservation of Mass or Continuity: Equations that allow a quantitative look at the OCEAN.
Exploring Geology Chapter 16 Rivers and Streams
Land-Ocean Interactions: Estuarine Circulation. Estuary: a semi-enclosed coastal body of water which has a free connection with the open sea and within.
Section 2: The Planetary Boundary Layer
Direct numerical simulation study of a turbulent stably stratified air flow above the wavy water surface. O. A. Druzhinin, Y. I. Troitskaya Institute of.
Bedforms in Unidirectional Flow
Forces and accelerations in a fluid: (a) acceleration, (b) advection, (c) pressure gradient force, (d) gravity, and (e) acceleration associated with viscosity.
Flow over an Obstruction MECH 523 Applied Computational Fluid Dynamics Presented by Srinivasan C Rasipuram.
Tropical Meteorology I Weather Center Event #4 Tropical Meteorology What is Tropical Meteorology? – The study of cyclones that occur in the tropics.
CHE/ME 109 Heat Transfer in Electronics
©2010 Elsevier, Inc. Chapter 2 Properties of Water Dodds & Whiles.
Boundary Layer Flow Describes the transport phenomena near the surface for the case of fluid flowing past a solid object.
Lesson 21 Laminar and Turbulent Flow
Environmental Engineering Lecture Note Week 10 (Transport Processes) Joonhong Park Yonsei CEE Department CEE3330 Y2013 WEEK3.
Turbopause and Gravity Waves Han-Li Liu HAO National Center for Atmospheric Research.
1 Equations of Motion Buoyancy Ekman and Inertial Motion September 17.
Unit 1 Earth’s Water Lesson 1 Water and Its Properties Lesson 2 The Water Cycle Lesson 3 Surface Water and Groundwater.
Sculpting Earth’s Surface
For flow of 1 m/s in round-bottom channel of radius 1 m, what is the Reynold’s number? Is the flow laminar or turbulent? Re < 500 laminar Re > 2000 turbulent.
Observed Structure of the Atmospheric Boundary Layer
Physical Conditions 9/16-9/ including Hurricane Isabel inches Hg ft (MLLW) knots inches Atmospheric Pressure.
OCEAN CIRCULATION. DENSITY OF SEAWATER DENSITY INCREASES DEPTH INCREASES TEMP DECREASES SALINITY INCREASES EFFECT OF TEMP > EFFECT OF SALINITY.
Chapter 10 Waves.
Pharos University ME 352 Fluid Mechanics II
River Systems Earth Space Science Mr. Coyle. The Hydrologic Cycle Infiltration = Groundwater System Runoff = Surface Water System Runoff = Precipitation.
Water as an Environment Light Water Movements Part 3.
Resistance in Fluid Systems Mr. Andracke Principles of Technology.
Convection in Boundary Layers
4.2 Notes RESISTANCE IN FLUID SYSTEMS. Resistance in Fluid Systems Drag - the force opposing motion when a solid moves through a fluid Drag occurs only.
Residence Time. 100 gallons1 gallon/min Residence Time of Water Ice caps: 10,000 to 200,000 years Deep groundwater: ,000 years Oceans:
..perhaps the hardest place to use Bernoulli’s equation (so don’t)
What Causes the Wind? Newton’s Second Law F = ma.
D A C B z = 20m z=4m Homework Problem A cylindrical vessel of height H = 20 m is filled with water of density to a height of 4m. What is the pressure at:
With your host/hostess, Your classmate Chapter 9 Review Jeopardy.
EVAT 554 OCEAN-ATMOSPHERE DYNAMICS FILTERING OF EQUATIONS FOR OCEAN LECTURE 10 (Reference: Peixoto & Oort, Chapter 3,8)
“the oceanography of lakes” Study of the functional relationships and productivity of freshwater communities, as they are regulated by the dynamics of.
© 2017 SlidePlayer.com Inc. All rights reserved.