Waves of high frequency in suspensions near the critical point of the particulate pressure-density dependence

摘要: The paper considers theoretically the propagation of weakly nonlinear high-frequency waves in homogeneous gas-solid suspensions. governing equations include equation particle conservation and mean motion particles. These are supplemented by a barotropic dependence particulate pressure on volume fraction which has point maximum (critical point) separating regions increase decrease pressure. Under condition that gas viscosity is negligible, laws represent system mixed hyperbolic-elliptic type. It shown uniformly fluidized bed operated at critical concentration unstable with respect to sinusoidal oscillations.