A cellular automata (CA) model for fluid-dynamic simulations is presented a
s a strategic tool for monitoring physical properties which are difficult t
o be measured by an experiment. The use of an arbitrary number of rest part
icles let the FHP-N model recover the Galileian invariance, which was missi
ng in the standard FHP model. The code has been implemented on a Gray T3E s
upercomputer. The overall speed-up performance is very good, being superlin
ear, as far as particles propagation and average procedure are regarded. Th
e efficiency, i,e,, a measure of the overhead of the parallel code versus t
he sequential one is constant up to 32 processors, and it is over 60% when
128 PEs are involved. The simulation results agree qualitatively with the e
xperimental ones, thus confirming the model to be an effective tool for sim
ulating a wide range of situations. (C) 2001 Elsevier Science B,V. All righ
ts reserved.