Viscosity

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# Viscosity - PowerPoint PPT Presentation

Viscosity. for students of Physics. Tom Ramsey Mentor High School Mentor OH 44060 tramsey@ncweb.com. Isaac Newton studied viscosity. Viscosity: Connecting with Chemistry and Biology. Does air resistance increase as v or v2???. Air resistance produced by collisions of gas molecules.

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Presentation Transcript
Viscosity

for students of Physics

Tom Ramsey

Mentor High School

Mentor OH 44060

tramsey@ncweb.com

Isaac Newton studied

viscosity

Viscosity: Connecting with Chemistry and Biology

Does air resistance increase as v or v2???

Air resistance produced by collisions of gas molecules

Air Resistance Increases with Temp

Proportional to v for slow speeds

Proportional to v2 for higher speeds

Because of turbulence

Reynolds number provides dividing line

Visc.smd

Viscosity/friction in a fluid

Decreases with increasing Temp

Produced by decreasing intermolecular forces

Non-Newtonian Fluids

Viscosity_liquid.smd

3 oils/5 temp

Applications

Bernoulli’s equation

Non-newtonian fluids

Pouiselle’s Equation:

Q ~ r4

Alt. Models:fractals,

percolation

Dr. Jean Leonard Marie Poiseuille Checks his heart

Introduction

Provides a connection between math,chemistry

Biology and Physics

Provides students a chance to look at

alternate scientific models.

Provides a molecular explanation as an alternate

To the usual continous model

Intended Audience

AP,Honors, Regular Physics

Builds on what students have learned

In other classes

None required-all levels of Physics

can handle

Placement in Curriculum

After kinematics and dynamics

Some concepts such as Pressure were

learned in Chem

Goals and Objectives

Determine the relationship between

temp and viscosity for both gases and

liquids

Compare different models for viscosity

understand the usefulness of Reynold’s number

As a criterion for distinguishing turbulent and nonturbulent flow.

Give reports on the application of viscosity to other fields such

As Biology, Chemistry and Engineering

Resources

1 computer per 2/3 students

Smd program with viscosity files

for liquid and gases.

Standard lab equipment(hot plates,

for wet labs)

Bibliography

Websites:

Transtronics:Viscosity Basics

Fluid Dyanmics Online Textbook

Vicosity of Lava Flows

Wolfram Research(Mathematica) Navier Stokes Equation

Mathematica model of Galileo's Experiment

BU software/curricular material

References:

Physics by Douglas Giancoli 3rd

Schaum’s Outline Series:

Fluid Dynamics

Solving Problems in Fluid Mechanics

Vol2 by JF Douglas 1967

Life’s Devices by Steven Vogel

Princeton University Press

ISBN0691024189