Week 9 Flow Properties, Viscosity and Liquid Surfaces Flashcards
what does the conservation of energy and bernoulli eqns tell us
as velocity increases pressure decreases
what is the viscosity force eqn
η = Fl / Av
define viscosity
resistance of a fluid to a change in shape
what are the competing forces in a flowing liquid
viscous forces against the inertial forces
what is the Reynolds number eqn
R = ρL^2v^2 / ρLv
what does the reynolds number tell us and how
determines the flow regime
if R «_space;1 laminar
if R»_space; 1 turbulent
what is always true of free energy
it finds its min value
what is the capillary action height eqn
h = [2(γsg - γsl)]/ρgR
R is radius of tube
where do drag forces arise in laminar flow
drag forces arise from shear stress
where do drag forces arise in turbulent flow
drag forces arise from pressure differences
