Generation of a Disturbance Wave on a Liquid Film Flowing Down a Heated Inclined Plane

An investigation was conducted into the generation of a disturbance wave on a liquid film flowing down a heated inclined plane. Theoretical analysis based on the instability caused by both dynamic and kinematic waves shows that the Marangoni effect due to the surface tension gradient contributes to reduction of the critical flow rate of the liquid on the occurrence of a disturbance wave. Theoretical results suggest the existence of two boundaries on generation of a disturbance wave at a fixed inclined angle. The flow pattern of a liquid film flowing down a heated brass duct was examined