Abstract

Small solid particles contained in a gas are unable to follow rapid changes of velocity and temperature of the gas immediately. These relaxation effects give rise to dispersion and attenuation of sound waves passing through the mixture. These phenomena are treated in the case in which the mean state of the flow is a constant equilibrium state as well as in two special cases in which the mean velocity difference of both media does not vanish. Using these results, a condition is derived which has to be satisfied for shock waves to be possible in the mixture.

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