02-05-2012, 12:39 PM
Macroscopic Mass BalancesFluid Flow
ChE354_massbal.ppt (Size: 251 KB / Downloads: 41)
Goals:
apply the mass, momentum and mechanical energy balances to macroscopic flow problems
calculate bulk (macroscopic) stream properties such as average velocity and mass velocity
describe how momentum enters or exits a system
describe the contributions to the mechanical energy balance and discuss how energy can enter a system
Macroscopic Mass Balance
When properties vary over cross section it is sometimesmore convenient to use bulk average properties: