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rpayne1-Visitor
1-Visitor
June 16, 2016
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Reynolds Number

  • June 16, 2016
  • 4 replies
  • 7931 views

I am doing calculating the Reynolds number in English units and I am getting units with it.

I can't figure out why either. I would appreciate some help.

See Picture belowreynolds_numer.PNG

    Best answer by AlanStevens

    Use lbf rather than lb in viscosity.

    Alan

    4 replies

    A
    AlanStevens19-TanzaniteAnswer
    19-Tanzanite
    June 16, 2016

    Use lbf rather than lb in viscosity.

    Alan

    A
    AlvaroDíaz12-Amethyst
    12-Amethyst
    June 17, 2016

    Hi Alan. How are you? I love ask in class this question (hope well translated to english): "how much it weighs one kilogram of sugar?" Can you help me cheking if that is well formulated in english, and showme how to ask it with pounds without explicit saying avoirdupois? That, in case that the question was entirely correct, like with kg, but I'm not sure if that's the case for pounds.

    Best regards.

    Alvaro.

    A
    AlanStevens19-Tanzanite
    19-Tanzanite
    June 17, 2016

    AlvaroDíaz wrote:

    Hi Alan. How are you? I love ask in class this question (hope well translated to english): "how much it weighs one kilogram of sugar?" Can you help me cheking if that is well formulated in english, and showme how to ask it with pounds without explicit saying avoirdupois? That, in case that the question was entirely correct, like with kg, but I'm not sure if that's the case for pounds.

    Best regards.

    Alvaro.

    HI Alvaro, 

    In English:  "How much does one kilogram of sugar weigh?"

    SImilarly: "How much does one pound of sugar weigh?"

    ‌However, why anyone still wants to use these outdated English units is beyond me!!

    Alan

    V
    24-Ruby IV
    ValeryOchkov24-Ruby IV
    24-Ruby IV
    June 16, 2016

    Fig-16-6.png

    T
    tietjee15-Moonstone
    15-Moonstone
    June 16, 2016

    Reynolds number is Velocity (ft/sec) times Length (ft) divided by Kinematic Viscosity (ft^2/sec).  You are using Dynamic Viscosity.

    Cheers

    F
    Fred_Kohlhepp23-Emerald I
    23-Emerald I
    June 17, 2016

    There are two equations for Reynold's Number (since there are two viscosities:

    V
    24-Ruby IV
    ValeryOchkov24-Ruby IV
    24-Ruby IV
    June 17, 2016

    There is only dynamic viscosity or viscosity. Kinematic viscosity is one calculation phantom.

    R
    rpayne1-VisitorAuthor
    1-Visitor
    June 16, 2016

    Thank you. It shouldn't surprise you that it worked.

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