Packed Beds Flashcards
(18 cards)
Spaces between these particles create a ______________ through which fluid can flow
porous medium
assumption: ratio of the diameter of the tower to packing diameter (minimum) of __________________ for wall effects to be small
8:1 to 10:1
A perfect sphere has a sphericity of?
1
it is a measure of how closely the shape of a particle resembles a perfect sphere
sphericity
this also influences the packing density and void fraction of the bed
sphericity
Particles with ____________ sphericity cause more turbulence and higher friction, increasing pressure drop.
lower
this velocity is based on void (fluid flow) area between the particles
interstitial velocity
the is the actual velocity that is based on the area actually open to the flowing fluid in laminar flow in packed beds
interstitial velocity
which is larger, superficial or interstitial velocity?
interstitial velocity
this is theoretical velocity in laminar flow in packed bed
superficial velocity
this velocity is based on the total cross-sectional area of the bed
superficial velocity
these are hollow pipe, tube, or vessel that contains packing materials (spheres, irregular
shape particles, cylinders or others
packed beds/columns
this velocity depends on void fraction
interstitial velocitythis
this is the empty tower velocity
superficial velocity
this affects fluid flow and pressure drop through the packed bed
sphericity
Sphericity affects ___________ and _________________ through the packed bed.
fluid flow; pressure drop
this is called the packing material
solid particles
other term for packed beds
packed columns
