Exam 2 Reading Notes.docx - Swimming Machine Michael and George Notes Fish that encounter vortices sense a difference in pressure variations of the

Exam 2 Reading Notes.docx - Swimming Machine Michael and...

This preview shows page 1 - 2 out of 3 pages.

Swimming Machine Michael and George Notes: Fish that encounter vortices sense a difference in pressure variations of the spinning eddies. In order to capture energy from the vorticies and boost its swimming efficiency, the fish instinctively times flapping of its tail to create counterrotating whorls that meat and weaken encountered ones. Built a robotic tuna to analyze roll of vorticies. Grays paradox, says that basically the dolphin was too weak by a factor of seven to attain such speeds. So how does it do it? Strouhal number = frequency of tail swishing x width of jet / speed of fish. Ideal is .25 - .35 Initial flap makes a large vortex, second flep creates a counter rotating flap, when the two vorticies combine the create jet and are pushed away from the tail, weakening each other. The extraction of energy from unsteady flows using station foil is called katzmayr effect. How can fish start and stop so quickly? Ability to produce sudden very large forces. Vortices create a pressure gradient and then control them to ptimeze resonse.
Image of page 1

Subscribe to view the full document.

Image of page 2
  • Fall '09
  • Astronomy, Shark, Tendon, high voltage pulse

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Ask Expert Tutors You can ask 0 bonus questions You can ask 0 questions (0 expire soon) You can ask 0 questions (will expire )
Answers in as fast as 15 minutes