Flow Reactor  Modeling and Simulation
Flow Reactor Modeling and Simulation  Model the fluid mixing
characteristics of large scale storage vessels with the interactive Residence
Time Distribution Curve Simulator.
Perfectly Mixed Flow:
In a Perfectly Mixed Flow reactor there are no spatial
gradients of temperature or of material concentration. A perfectly mixed flow
reactor may be modellized by an exponential decay curve as indicated.
Non Ideal Flow:
In a real fluid mixing reactor the flow may inlude zones such as: i) flow recirculation, ii) Stagnant
flow or dead volume and iii) flow short circuiting. Non ideally mixed flow can be modellized by RTD curves.
Residence Time Distribution Curves:
RTD curves involve the injection of a conservative
tracer to the inlet stream of a fluid mixing reactor. RTD curves may be used to fit a reactor model that describes the real
flow characteristics of the fluid mixing vessel.


Input: Tank Volume
C_{0}  Initial Concentration
1.00
Input: Tank Flow Rate
T  Nominal Residence Time
200.10
1/T
0.0050

For example, a tank may be
described as a recirculating flow reactor with 10% dead volume. Subsequent design modification and reactor model analysis may lead to the elimination/reduction of unmixed zones thereby leading to a more efficient mixing process.
ReCirculating Flow:
Within a
recirculating flow reactor nonuniform dispersion of the incoming particles, and both
chemical and turbulent diffusion will take place leading to an imperfectly mixed
tank. A single nonideal tank may be modelled as a number of
(n) smaller ideally mixed reactors in series with flow recirculation.
Plug Flow: The output response from an ideal Plug Flow vessel will be identical to
that of the input stimulus. If a unit pulse of tracer were injected into a
vessel in which dispersion and diffusion do not take place, then after a time delay equivalent to the
Nominal Residence Time (T) of the vessel, a unit pulse response would be recorded at the outlet stream.
Residence Time Distribution: For ideal plug flow within a vessel all
fluid elements will spend the same amount of time in the system. Non ideal flow
through a container will have a distribution of residence times.