CHEN 3005 Lecture Notes - Lecture 1: Dimensionless Quantity, Energy Density, Porosity
25 Dec 2014
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Very little numerical stuffmostly variablescan do most of it w/o calculator. Channels: tubes, ducts avg velocity frictional factor driving force per unit area wetted perimeter kinetic energy density. Tube: generic formula for any type of shape specific for cylindrical tube. Chen transport page 1 perimeter of circle no units. -> f has not units laminar flow could hypothetically occur past re > 2000 --> metastablebut if disturbed, then turbulent. Hydraulically smooth = no turbulencelines above it = turbulent. For laminar flow in a tube (u is avg velocity) Use the result for a circular channel replace the reynold"s # w/ the 4 is here so that the empiricism reduces down to a circle. Need to first calculate re if don"t have itthen can move on to further calculations. Chen transport page 4 start w/ similar eqn, but difference in how variables are defined projected area fluid density not density of the solid that"s submerged.
