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Homework Help: No slip condition

  1. Jun 16, 2016 #1
    1. The problem statement, all variables and given/known data
    i was told that

    For a given fluid the velocity of fluid in contact with with solid boundary is equal to the velocity of solid boundary in a book . In another book , I was told that the velocity of fluid at the solid boundary is 0 , which is correct ? can someone explain ?

    2. Relevant equations

    3. The attempt at a solution
    imo , the first one is wrong , the second statement is correct , am i right ? can someone expalin pls?
  2. jcsd
  3. Jun 16, 2016 #2


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    Science Advisor
    Gold Member

    Taken at face value the first statement allows for the solid boundary to be moving and the second statement assumes that it is not moving . In either case the velocity of the fluid in contact with the solid boundary is zero relative to the boundary .

    We really need to see the actual text from the books though to be certain about what is being said about this .
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