Wavy Film Flow Along Periodic Wall Under Monochromatic-Frequency Flowrate Perturbation  

作　　者：许松林 高永川 

机构地区：[1]School of Chemical Engineering and Technology, Tianjin University

出　　处：《Transactions of Tianjin University》2011年第4期305-312,共8页天津大学学报（英文版）

基　　金：Supported by National Natural Science Foundation of China (No. 20976118)

摘　　要：Surface wave dynamics of falling film on the surface of periodic rectangular wall under monochromatic-frequency flowrate forcing disturbances is studied via numerical simulation. Waveforms formed on the periodic rectangular wall are different from those on the flat plate. At low frequency, the perturbation introduced at the inlet first undergoes a steady flow region and then develops into solitary waves. When the frequency becomes higher, solitary waves disappear. Film deformations in the steady flow region and characteristics of solitary waves are studied as the film travels down. There are circulations at the depression of periodic wall which are dependent on the local film characteristics and geometry of the corrugation. Moreover, the flow rate and geometry of the corrugations can also affect the evolvement of the monochromatic perturbation.Surface wave dynamics of falling film on the surface of periodic rectangular wall under monochromatic- frequency flowrate forcing disturbances is studied via numerical simulation. Waveforms formed on the periodic rec- tangular wall are different from those on the flat plate. At low frequency, the perturbation introduced at the inlet first undergoes a steady flow region and then develops into solitary waves. When the frequency becomes higher, solitary waves disappear. Film deformations in the steady flow region and characteristics of solitary waves are studied as the film travels down. There are circulations at the depression of periodic wall which are dependent on the local film char- acteristics and geometry of the corrugation. Moreover, the flow rate and geometry of the corrugations can also affect the evolvement of the monochromatic perturbation.

关 键 词：periodic rectangular wall circulation flow solitary wave disturbance frequency film flow 

分 类 号：O484[理学—固体物理]