Stage1:Spraybreakup OpenFOAM
simulates
the
breakup
of
diesel
as
it
leaves
an
injector
nozzle
to
predict
the
breakup
behaviour.
Parameters
such
as
breakup
length,
angle,
distribution
of
droplet
size
can
be
extracted
from
the
results.
Stage2:Spraytracking (below
left)
OpenFOAM
tracks
droplet
‘packets’
with
given
distribution
of
droplet
size,
temperature,
population
and
thermophysical
properties
travelling
away
from
the
nozzle.
The
turbulence
is
modelled
by
LES
and
models
are
included
for
atomisation,
breakup,
collision,
dispersion,
drag,
evaporation,
heat
transfer
and
wall
interactions.
Sprayinadieselengine (centre)
OpenFOAM
simulates
the
motion
of
the
piston
head
during
the
period
of
fuel
injection.
The
simulation
uses
a
sector
mesh
and
runs
in
parallel.
Stage3:Combustion (right)
OpenFOAM
simulates
auto-ignition,
combustion
and
pollutants
of
the
spray
with
complex
chemsitry
modelling
using
OpenFOAM
implementation
of
the
CHEMKIN III
chemical
kinetics
package.
