Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 11, 2020 - November 13, 2020
The optically induced Marangoni effect of a transparent liquid film with weak absorption on an absorbing solid substrate is investigated by means of linear stability analysis. The evolution of the film surface is described by a thin film equation. A linear dispersion relation is obtained by substituting a perturbed solution into the equation and linearizing the result with respect to the perturbation. The thickness dependence of the surface temperature of such a film is affected by both the absorbency and transparency of the film, and consequently, the stability of the film surface varies depending on the thickness and extinction coefficient of the film. The results imply that the surface is stabilized above a certain value of the extinction coefficient.
