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No slip condition

  • Thread starter foo9008
  • Start date
  • #1
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Homework Statement


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 ?


Homework Equations




The Attempt at a Solution


imo , the first one is wrong , the second statement is correct , am i right ? can someone expalin pls?
 

Answers and Replies

  • #2
Nidum
Science Advisor
Gold Member
2,990
848
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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