The aim of this course was to learn how to handle two phase
flows with FLUENT. As a matter of fact, Fluent is able to simulate a case
where two different fluids are present in the same flow. The model used
is called V.O.F. for Volume Of Fluid. Nonetheless, this is no more
as easy as it used to be for one single fluid, and we will try to demonstrate
that this kind of calculation is much more expensive than those we were
So, it is not possible to launch a calculation without
thinking about it, unless you want to put a one day long calculation in
The subject was open: We have choosen to illustrate the
use of the VOF with a bubble made of air moving in a column of water, only
because of the gravity (no velocity).
First, we will explain how to configure Fluent in order
to take the particularities of two phase flows into account, and then we
will expose our results. Eventually, we will compare what we got with the
computer to what we were expecting according to the theory.