LATTICE BGK SIMULATION OF SOUND-WAVES

We consider the application of the lattice Boltzmann BGK model to simu late sound waves in situations where the density variation is small co mpared to the mean density. Linear sound waves are simulated in two di fferent situations: a plane wave propagating in an unbound region; and a wave in a tube. For both cases the behaviour of the simulated waves is found to be in good agreement with analytic expressions. Non-linea r sound waves are also simulated and are seen to display the expected features.