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报告人: 香港科技大学，徐新鹏
报告题目: Continuum modeling of two-phase flows on solid substrates
报告时间: 2011年11月29日，星期二 10:00 am - 11:00am
报告地点: B703
摘要:
Two-phase flows on solid substrates are ubiquitous in nature. When you drink a cup of coffee, coffee displaces the air and flows into your mouth along the cup wall. When coffee is spilled onto the desk, it spreads out spontaneously. Moreover, a coffee ring appears after the evaporation of water in coffee. In addition, two-phase flows also find roles in nano-/micro- scale devices developed for lab-on-chip applications. However, the modeling of two-phase flows on solid substrates has been a challenging task for a century. The difficulty arises from the failure of the frequently used no-slip boundary conditions at the contact line, i.e., the intersection of the fluid-fluid interface with solid substrate.
This presentation will provide an overview of the continuum modeling of two-phase flows on solid substrates. Major difficulties in the modeling will be addressed. Possible solutions will be given for two typical systems: (i) Isothermal two-phase flows on solid substrates -- immiscible binary mixtures, (ii) Non-isothermal two-phase flows on solid substrates--one-component liquid-gas flows involving phase transitions in non-uniform temperatures.