Lecture 17 – Aero/Hydrodynamic Properties (Ch. 10)

Slides:

Advertisements

Similar presentations

Particle Fall through the atmosphere

Advertisements

Motion of particles trough fluids part 2

Week # 2 MR Chapter 2 Tutorial #2

Aero-Hydrodynamic Characteristics

UNIT 2/EAT UNIT 2/EAT Good Enough to Eat. In this topic we look at: Fluid flow (VISCOSITY) Material properties Refraction & sugar content of liquids (REFRACTOMETRY)

PETE 411 Drilling Engineering

Physics Part 1 MECHANICS

Motion of particles trough fluids part 1

- Prepared by Shakil Raiman

Motion of particles trough fluids part 2

Fluid Friction. Outline Bernoulli ’ s Equation The Pressure-Drop Experiment Laminar Flow Turbulent Flow The Three Friction Factor Problems Computer Methods.

1 Lecture #5 of 25 Moment of inertia Retarding forces Stokes Law (viscous drag) Newton’s Law (inertial drag) Reynolds number Plausibility of Stokes law.

Chapter 9 Solids and Fluids (c).

Engineering H191 - Drafting / CAD The Ohio State University Gateway Engineering Education Coalition Lab 4P. 1Autumn Quarter Transport Phenomena Lab 4.

1 Class #4 Retarding forces Stokes Law (viscous drag) 2-D motions with viscous drag Newton’s Law (inertial drag) Reynolds number Plausibility of Stokes.

Core Ag Engineering Principles – Session 1

Resistance in Fluid Systems

Drilling Engineering – PE 311 Turbulent Flow in Pipes and Annuli

Resistance in Fluid Systems

Boundary layer concept

CHE315 Pressure Drop and Friction Loss 2.10 Design Equations for Laminar and Turbulent Flow in Pipes.

Resistance In Fluid Systems 4.2. Define Drag For a solid object moving through a fluid or gas, drag is the sum of all the aerodynamic or hydrodynamic.

Lesson 21 Laminar and Turbulent Flow

Things to grab for this session (in priority order)  Pencil  Henderson, Perry, and Young text (Principles of Process Engineering)  Calculator  Eraser.

Flow Around Immersed Objects

Chute-ing Among the Stars. What is a parachute? How does a parachute operate? Where have you seen a parachute deployed?

QUESTIONS ON DIMENSIONAL ANALYSIS

Motion of particles trough fluids part 1

Lesson 23 HEAD LOSS DEFINE the terms head loss, frictional loss, and minor losses. DETERMINE friction factors for various flow situations using the Moody.

Unit 1: Fluid Dynamics An Introduction to Mechanical Engineering: Part Two Fluid dynamics Learning summary By the end of this chapter you should have learnt.

Fluid Resistance.

Fluids Physics 202 Lecture 3. Pascal’s principle: any pressure change will flow through the entire fluid equally.

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.

Resistance in Fluid Systems Mr. Andracke Principles of Technology.

Unit 1 Physics on the go Topic 2 Materials: Viscosity.

Physics Section 8.3 Apply the properties of flowing fluids The flow of a fluid is laminar if every particle that passes a particular point moves along.

이 동 현 상 (Transport phenomena) 2009 년 숭실대학교 환경화학공학과.

Chapter 4.2 Notes Resistance in Fluids. When one solid object slides against another, a force of friction opposes the motion. When one solid object.

Characteristics of Fluid Flows Chapter 2 Henderson, Perry and Young BAE 2023 Physical Properties1.

Friction Factors, Pumping and You Understanding how friction affects your bottom line.

UNIVERSITY OF GUYANA FACULTY OF NATURAL SCIENCES DEPART. OF MATH, PHYS & STATS PHY 110 – PHYSICS FOR ENGINEERS LECTURE 14 (THURSDAY, DECEMBER 8, 2011)

Prof. Jiakuan Yang Huazhong University of Science and Technology Air Pollution Control Engineering.

FLUID FOW FOR CHEMICAL ENGINEERING

INSECTS AND HYDRODYNAMICS:

SETTLING & SEDIMENTATION IN PARTICLE-FLUID SEPARATION

FLOW IN FLUIDIZED BEDS Fluidization refers to those gas-solids and liquid-solids system in which the solid phase is subjected to behave more or less like.

Viscosity Contents: How to calculate Whiteboards.

1. Relative motion between a fluid and a single particle

Environmental Engineering Lecture Note Week 11 (Transport Processes)

Viscosity, Poiseuille’s Equation, Coanda Effect

FLUID FLOW OPERATIONS Guided by : Prof. Vaishali Umrigar Prepared By :

Well Design PE 413.

Aero/Hydrodynamic Properties

Particle (s) motion.

Fans – Lecture 2 Fan testing: Dr. C. L. Jones

Aero/Hydrodynamic Properties (Ch. 10)

CFD – Fluid Dynamics Equations

Mechanical Separation

Aero/Hydrodynamic Properties

PO 2430 Applied Fluid MEchanics

SETTLING AND SEDIMENTATION.

PHY 711 Classical Mechanics and Mathematical Methods

Particle Collection Mechanisms

Presentation transcript:

Lecture 17 – Aero/Hydrodynamic Properties (Ch. 10) 3/31 Aero- & Hydrodynamic Properties …examples (HW #10 Due 4/7) 4/2 Fans and Fan Laws Introduction 4/4 Fans and Pneumatic Conveyance 4/7 Conveyance systems and Review (HW #11 Due 4/14 4/9 Test #2 Covers Pumps, EM, Aero/Hydrodynamics and fans 3/31/08 BAE 2023 Physical Properties - Spring 2008 - Dr. C. Jones

Lecture 17 – Aero/Hydrodynamic Properties (Ch. 10) Air and water are used to remove foreign material from products How much air required depends on the drag force FD ( sum of skin friction and pressure drag) FD affected by density, abs. viscosity, area and velocity (equation 10.1) Reference Figure 10.1 Dr. C. L. Jones Biosystems and Ag. Engineering 3/31/08 BAE 2023 Physical Properties - Spring 2008 - Dr. C. Jones

BAE 2023 Physical Properties - Spring 2008 - Dr. C. Jones Figure 10.1 3/31/08 BAE 2023 Physical Properties - Spring 2008 - Dr. C. Jones

Lecture 17 – Aero/Hydrodynamic Properties (Ch. 10) FD depends on the drag coefficient CD which is quantified using the Reynolds number. NRe = Vdpρf/η Where: V = fluid velocity dp = particle dimension ρf= fluid density η = absolute viscosity NRe<1.0, Stokes flow, FD=3πdpμV (sphere) NRe<1,000 Laminar flow NRe >20,000 Turbulent flow Dr. C. L. Jones Biosystems and Ag. Engineering 3/31/08 BAE 2023 Physical Properties - Spring 2008 - Dr. C. Jones

Lecture 17 – Aero/Hydrodynamic Properties (Ch. 10) Terminal velocity: occurs when drag force balances gravitational force See Table 10.1 For a sphere Fdrag=CD(πd2/4)(ρfv2/2) CD depends on the Reynold number of the particle: Rep= ρfvd/μ (restated from eqt. 10.1 in different terms) If Rep<0.2, CD=24/Rep If Rep>200,000, CD=0.44 If Repis between 500 and 200,000, CD=(24/Rep)(1.0 + 0.15(Rep)0.687) Dr. C. L. Jones Biosystems and Ag. Engineering 3/31/08 BAE 2023 Physical Properties - Spring 2008 - Dr. C. Jones

Lecture 17 – Aero/Hydrodynamic Properties (Ch. 10) Read Example Problem 10.1. You will need to be familiar with it. This examples shows how to find a Reynolds number for a particle, the drag coefficient and the terminal velocity Dr. C. L. Jones Biosystems and Ag. Engineering 3/31/08 BAE 2023 Physical Properties - Spring 2008 - Dr. C. Jones

Lecture 17 – Aero/Hydrodynamic Properties (Ch. 10) Application example: Can corn stalks be separated from corn cobs pneumatically? What minimum air velocity can be used? How well will it be separated? How could we improve the separation? Dr. C. L. Jones Biosystems and Ag. Engineering 3/31/08 BAE 2023 Physical Properties - Spring 2008 - Dr. C. Jones

Lecture 17 – Aero/Hydrodynamic Properties (Ch. 10) Application example: A seed company would like to move soybeans through a pipe (5.25” inside diameter) pneumatically. What capacity should the air source (the fan) be rated for? Dr. C. L. Jones Biosystems and Ag. Engineering 3/31/08 BAE 2023 Physical Properties - Spring 2008 - Dr. C. Jones