viscosity isaac newton studied viscosity. viscosity: connecting with chemistry and biology does air...
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![Page 1: Viscosity Isaac Newton studied viscosity. Viscosity: Connecting with Chemistry and Biology Does air resistance increase as v or v2???](https://reader035.vdocument.in/reader035/viewer/2022062315/5697bff41a28abf838cbcfe7/html5/thumbnails/1.jpg)
Viscosity
Isaac Newton studied viscosity
![Page 2: Viscosity Isaac Newton studied viscosity. Viscosity: Connecting with Chemistry and Biology Does air resistance increase as v or v2???](https://reader035.vdocument.in/reader035/viewer/2022062315/5697bff41a28abf838cbcfe7/html5/thumbnails/2.jpg)
Viscosity: Connecting with Chemistry and Biology
Does air resistance increase as v or v2???
![Page 3: Viscosity Isaac Newton studied viscosity. Viscosity: Connecting with Chemistry and Biology Does air resistance increase as v or v2???](https://reader035.vdocument.in/reader035/viewer/2022062315/5697bff41a28abf838cbcfe7/html5/thumbnails/3.jpg)
Air resistance produced by collisions of gas molecules
Air Resistance Increases with Temp
Proportional to v for slow speeds
Proportional to v2 for higher speedsBecause of turbulence
Reynolds number provides dividing line
Visc.smd
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Viscosity/friction in a fluid
Decreases with increasing Temp
Produced by decreasing intermolecular forces
Non-Newtonian Fluids
Viscosity_liquid.smd
3 oils/5 temp
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Dr. Jean Leonard Marie Poiseuille Checks his heart
Applications
Bernoulli’s equation
Non-newtonian fluids
Pouiselle’s Equation: Q ~ r4
Alt. Models:fractals,percolation
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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
continuous model
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Intended Audience
AP,Honors, Regular Physics
Builds on what students have learned in other classes
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Adjustments/Adaptations
None required-all levels of Physics can handle
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Placement in Curriculum
After kinematics and dynamics
Some concepts such as Pressure were learned in Chem
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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
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Day 1: Air Resistance(Wet Lab)
Coffee Filter Lab
•F v or F v2 ????•Cedar Point/Six Flags•Cold Air+Warm Air
Day 2: Macro Micro(Computer)
Visc.smd
•F v (Stokes)
•F=P/t * A versus m,T
Time Line
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Day 3: Kinetic Karnival Video:
“Viscosity”
Lab:Marbles in Oil(Wet)
Non-NewtonianFluids (Corn Starch,Slime etc).
versus T for liquid
Day 4: liquid.smd(Computer)
Demo: KMn04 in warm H2O(wet)
H increases with temp in gas(collisions increase)but decreases in liquid( intermolecular forces)
Day 5 Bernoulli’s Equation
Continuity Equation
Endless numbers of examples
From groundhogs, to baseballs to airplane wings
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Day 6 Poiseulle’s Equation /Heart Q ~ r4
Relate the velocity profile of a fluid in a pipe to Poiseulle’s Equation
Day 7 bernoulli_xtal.smd Airfoil crystal
Using SMD students build a crystal in the shape of an airfoil
Day 8: Student Reports 5 minute seminar
Examples from other sciences/enginering
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The End
….. Thank You …..