The Flow And Heat Transfer Characteristic And Stability Research On Wavy Liquid Film

Two mainly parts are presented in this thesis. First, based on the Navier-Stokesequation, the relation between the surface tension and the fluctuation by nonlinearfunction on temperature is expressed. Then the Orr-Sommerfeld equation describing theflow stability of liquid film is got. The perturbation method is used to calculate eachexpression of the wave velocity c, and the curves of stability parameter cI ∝ΔT for threekind of liquid low boiling points gases film is depicted using correlative data. In thesecond part, the stratified flowing theory is introduced to obtain the flow models of smalloscillation amplitude internal wave and the nonlinear internal wave with viscosity. Eachparameter in this problem is discussed, and the governing equation is educed. Therefore,some important improvements and extensions to the former research are reached.