Hydro

Show that Froude number of a propeller with diameter D and rotational speed n(1/sec) can be given as Fn=n*sqrt(D/g)

Obtain the governing equation for a viscous unidirectional flow in a circular pipe. Use the navier-stokes equations and employ the cylindrical coordinates. direction of the flow: z cylinder radius: r angle: a

Fr = v/sqrt(Lg) v = n R or (1/2) n D (1/2) n D / sqrt (D g) <----- = (1/2) n sqrt D/sqrt g = (1/2) n sqrt (D/g) What's the explanation of replacing L with D there?

Got it. I also am studying Naval Architecture by the way. And thanks for answering my other question about sloshing water frequency :)

Yea i assumed that you would provide a link to a similar subject that's why i asked here:) Anyway i just assumed the instructor was asking how to produce the Hagen–Poiseuille eq from navier-stokes so got the solution from wikipedia. Thanks anyways Damon :...