On the internal gravity waves in a shear flow of a dusty gas

The effect of fine dust on the internal gravity waves in the parallel shear flow of a Boussinesq fluid is considered in the absence of dissipative processes. Under the assumptions that the bulk concentration and the mass concentration of the dust are very small and that the relaxation time of the dust particles is very much less than the time characterizing the basic flow, it is found that the addition of dust particles results in a considerable reduction in the wave energy reabsorbed by the mean flow at the critical levels. Another significant result which may be of some practical importance is that at the critical level the waves 'suck' the particulates from the basic flow and transport them down.