Friction
In a viscous fluid, a boundary layer is formed. This causes a net drag due to friction. The boundary layer under goes shear at different rates extending from the hull surface until it reaches the field flow of the water.
Read more about this topic: Ship Resistance And Propulsion
Famous quotes containing the word friction:
“The admission of Oriental immigrants who cannot be amalgamated with our people has been made the subject either of prohibitory clauses in our treaties and statutes or of strict administrative regulations secured by diplomatic negotiations. I sincerely hope that we may continue to minimize the evils likely to arise from such immigration without unnecessary friction and by mutual concessions between self-respecting governments.”
—William Howard Taft (1857–1930)
“We have got onto slippery ice where there is no friction and so in a certain sense the conditions are ideal, but also, just because of that, we are unable to walk. We want to walk so we need friction. Back to the rough ground!”
—Ludwig Wittgenstein (1889–1951)