The generation and propagation of thermoacoustic waves in a water-filled square cavity is numerically studied in order to investigate the effects of them on the heat transfer at the boundary. In all cases considered

the left wall of the cavity is rapidly heated with different heating methods to generate thermoacoustic waves. The results show that the amplitudes of pressure and heat flux waves at the middle point of the right wall in water are much larger than that in air under the same boundary conditions. The value of pressure and heat flux increases sharply with the overheat ratio. Under the constant heat flux boundary condition

the pressure average in water is higher

but the heat flux is lower than that in air during the computation.