|May 26, 2001, 18:26||
Re: that's VOF?
VOF: Volume of Fluid.
When one wants to solve a multiphase flow problem say an air bubble rising in water he has a choice how to solve it.
1) solve the NS eqn in the water phase, solve the
NS eqn in the air phase and then see if the
boundary conditions are satisfied. if not
attempt a correction and try again. iterate
until patience has run out.
2) Use a one-fluid formulation which reduces (or masks)
the NS eqn into one equation and the correct eqn is
found via an indicator function (or step function).
Ie. we are in the water phase if indicator function
is one and zero if indicator function is zero or
on the boundary if indicator function is undefined.
(much easier to impliment into existing codes)
Now, VOF is a technique which is used to capture
or follow this indicator function via the scalar
CAUTIONARY WARNING FOR 3-D:
Not for people who failed geometry class!!!
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