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Thread: the duck

  1. #1

    the duck

    took this shot at sunrise of the duck liked how the water was a golden colour

    the duck

  2. #2
    Moderator Dave Humphries's Avatar
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    Re: the duck

    Nicely captured Warren

  3. #3

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    Re: the duck

    Good colours, Warren, and the duck's wake holds the shot together

  4. #4

    Re: the duck

    thank you for your comments they are much apprecated

  5. #5
    Stinky's Avatar
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    Re: the duck

    Great colors and awesome lighting. Nice job. Beautiful.

  6. #6

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    Re: the duck

    This is a lovely picture but is also interesting from a mathematical point of view. Why are there ripples in front of the main wake?

  7. #7

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    Re: the duck

    Tony, do you mean the bow wave? You have to go to computational fluid dynamics to understand it. My math education ended with basic difference and differential equations. And the way my brain currently computes I can't understand anything beyond simple optimization problems.

    Warren, nice image.

    karm

  8. #8
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    Re: the duck

    Quote Originally Posted by TonyW View Post
    This is a lovely picture but is also interesting from a mathematical point of view. Why are there ripples in front of the main wake?
    Don't forget there is a mix of wake and turbulence generated by the paddling feet. I think the main wake starts outside the finer ripples. If the America cup had not moved onto catamarans you may have been able to ask one of their designers.

  9. #9

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    Re: the duck

    Karm, yes I did mean the bow wave. Computational fluid dynamics is not needed to get the form of the wave. It's to do with group velocity and phase velocity coming out of complex variable analysis but I have forgotten most of this stuff in my retirement. The important thing is that it is beautiful photograph.

  10. #10

    Re: the duck

    thank you for the comments and the maths lesson

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