کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
159084 | 457026 | 2006 | 18 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The effect of surfactant on the flow of a thin liquid film over a spinning disc The effect of surfactant on the flow of a thin liquid film over a spinning disc](/preview/png/159084.png)
We examine the flow of a thin liquid film over a spinning disc in the presence of dilute insoluble surfactant. We use the integral method to derive a coupled system of equations that govern the axisymmetric evolution of the film thickness, radial flow rate, angular momentum and surfactant surface concentration; a linear equation of state is used for closure. This system of equations is parameterized by a modified Weber number, a Marangoni parameter, M , and a surface Peclet number, PesPes. Numerical solutions of these equations reveal that the presence of surfactant gives rise to Marangoni stresses which interfere with the mechanisms of wave growth. For M∼0.1M∼0.1, our results indicate that the formation of interfacial waves is suppressed.
Journal: Chemical Engineering Science - Volume 61, Issue 4, February 2006, Pages 1074–1091