Flow patterns in wavy thin films: Numerical simulation

✍ Scribed by David Moalem Maron; Neima Brauner; Geoffrey F. Hewitt

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 522 KB
• Volume: 16
• Category: Article
• ISSN: 0735-1933
• DOI: 10.1016/0735-1933(89)90071-7

✦ Synopsis

The characteristic behavior of the interfaeial velocity along the wave has been analytically and numerically explored. The identification of specific characteristic points along the interface provides additional insight on the hydrodynamics within the wave. It is shown, for instance, that for small ripples, similar velocity profile are obtained all along the wave unit with maximum interracial velocity at the peak of the wave. As the wave amplitude increases the peak velocity exceeds the wave velocity and a circulating region appears (in moving coordinate system) associated with stagnation points. The appearance of interfacial stagnation points depends mainly on the amplitude to substrate thickness ratio.