Lecture 16
Distributed Systems:
Steady State

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Ideal Reactors
•
Useful in understanding more complicated
models
•
Plug
‐
Flow Reactor (PFR): A 1D rectangular pipe in
which advection dominates (as the name implies):
Fundamental model for a stream
•
CSTR:
A fundamental model for lakes
•
Mixed
‐
Flow Reactor (MFR): A 1D rectangular pipe
in which both advection and diffusion are
important
•
Simplify our general equations to write the
equations for these two cases!

What is
J
?
•
Flux
•
Rate of movement of an extensive quantity
(e g
mass heat) per unit area per unit time
(e.g., mass, heat) per unit area per unit time
•
e.g.,
kg/(m
2
.s)

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