摘要
研究了液体内的单个球形气泡附着在固壁上的物理过程,推导了附着前后的体系自由能变化公式.考虑气泡受到浮力和表面张力作用,当接触角在0°～180°之间时,体系的ΔG<0,气泡的附着过程靠减少表面积会自发地进行;当接触角为0°或180°时,体系的ΔG=0,附着过程不会自发进行.气泡不会自发从固壁上脱落,必须有额外功才能发生.
Free energy change formula in system,which the spherical bubble attaches to solid wall in liquid,was deduced to prove that the bubble attachment process at the balance between the buoyancy and the surface tension on the bubble can occur spontaneously with a reduced surface area becauseΔG<0 in system at the condition of the contact angle ranging from 0°to 180°,while the phenomenon can not happen becauseΔG=0 in the system when the contact angle was equal to 0°or 180°.The attached bubble could not be broken...
出处
《过程工程学报》
CAS
CSCD
北大核心
2008年第S1期140-143,共4页
The Chinese Journal of Process Engineering
关键词
气泡
液体
固壁
自由能变化
bubble
liquid
solid wall
free energy change
