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Teaching & Academics Science Physics

Physics of Life 3. Fluids

How life pushes the envelope of physics
Highest Rated
Rating: 5.0 out of 55.0 (11 ratings)
88 students
Created by Scott Turner
Last updated 5/2019
English
English [Auto]
30-Day Money-Back Guarantee

What you'll learn

  • An understanding of what fluids are, their properties, and what makes them distinct from solids.
  • The interaction of inertia and viscosity in determining type of flow.
  • What the Reynolds number is, and how this determines the flow regime, including drag.
  • The different types of drag that operate on an organism, and how diverse creatures, like spiders, exploit drag to fly.
  • How body size constrains swimming, ranging from bacteria to blue whales.
  • How viscous drag helps animals live in burrows that might otherwise get stuffy.
  • The basic physics of swimming and flying.
  • Why our popular models of lift in wings is almost certainly wrong.
  • How animals glide and fly.

Requirements

  • You should have had high school physics and introductory college-level biology

Description

This course deals with life in fluids. Fluids are anything that flows, and nearly all living things inhabit a fluid environment of some sort, either water, air, or a self-created fluid such as mucus. Inhabiting a fluid world means being able to make fluids move, which requires work, which comes out of the creature's metabolic energy budget. Dealing with fluids means managing inertia and viscosity, and life is almost infinitely ingenious in clever ways of doing that. 

Physics of Life Fluidsis the third of a four module series in the series Physics of Life. Physics of Life Thermodynamics was the first. Physics of Life Biomechanics was the second. Following Physics of Life Fluids will be Physics of Life Wave Phenomena, which is concerned with sound and light.

Who this course is for:

  • Biology students who want to understand how life works in the physical world.

Course content

7 sections • 33 lectures • 5h 41m total length

  • Preview02:52

  • Preview02:48
  • Preview13:40
  • Preview11:45
  • 13.3 Capturing momentum in boundary layers
    10:17
  • 13.4 An animal pitot tube
    12:03
  • 13.5 Non-Newtonian fluids
    16:06

  • Preview02:24
  • 14.1 The Bernoulli principle
    12:24
  • 14.2 Induced flow
    13:27
  • 14.3 The Reynolds number
    15:34
  • 14.4 Applications of the Reynolds number
    19:57

  • Preview02:25
  • 15.1 Drag
    10:29
  • 15.2 Terminal velocity & Stokes' law
    17:41
  • 15.3 Viscous drag & ballooning spiders
    11:00
  • 15.4 Buoyancy
    08:34

  • Preview02:00
  • 16.1 Locomotion in fluids
    06:15
  • 16.2 Cilia and flagella
    15:44
  • 16.3 Swimming with undulipodia
    10:07
  • 16.4 Microbial locomotion
    11:16

  • Preview02:17
  • 17.1 Vortices and flow
    12:56
  • 17.2 Vortices and swimming
    12:40
  • 17.3 The Bernoulli model for lift
    08:59
  • 17.4 The Flettner rotor and the Magnus force
    09:24

  • Preview02:37
  • 18.1 Gliding flight
    10:57
  • 18.2 Gliding and soaring
    13:08
  • 18.3 Stability and maneuverability
    10:31
  • 18.4 Flapping flight
    12:44
  • 18.5 Limits to flapping flight
    16:39

Instructor

Scott Turner
Physiologist, Scientist, Writer, Media Maker
Scott Turner
  • 4.6 Instructor Rating
  • 206 Reviews
  • 734 Students
  • 11 Courses

I am a Professor of Biology at the State University of New York College of Environmental Science and Forestry in Syracuse, New York.

I am a physiologist by training but with a deep interest in the interface of physiology, ecology, adaptation and evolution. You can read some of my thoughts in two books I have published: The Extended Organism: The Physiology of Animal-Built Structures (2000) and The Tinkerer's Accomplice: How Design Emerges from Life Itself (2007), both published by Harvard University Press. I have completed a third book, Purpose and Desire: What Makes Something Alive and Why Modern Darwinisms Fails to Explain It, which was published in September 2017 by HarperOne. You can find out more about me at my web site (link above).

My current research focuses on the problem of emergent physiology in social insect colonies. specifically the mound building termites of southern Africa.

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