Contents Physics of Fluid Dimensions & Units Vector Algebra
and Calculus
Dimensions and Units
Taken from: Introduction to Fluid Mechanics, PRITCHARD &
LEYLEGIAN, 8th Edition
Derived Units
Definitions
Conversion Factors
Problem-1For low-speed (laminar) steady flow through a circular
pipe, as shown in thefollowing, the velocity u varies with radius
and takes the form:
Where is the fluid viscosity and p is the pressure drop from
entrance to exit. What are the dimensions of the constant B? (Ans:
L-1)
Newtons Law of Viscosity
Non-Newtonian Fluid
Problem-2A thin plate is separated from two fixed plates by very
viscous liquids 1 and 2, respectively,as in following figure. The
plate spacings h1 and h2 are unequal, as shown. The contact areais
A between the center plate and each fluid.
(a) Assuming a linear velocity distribution in each fluid,
derive the force F requiredto pull the plate at velocity V.
(b) Is there a necessary relation between the two viscosities,1
and 2?
