V.Ya. Shkadov
Plekhanov Academy, Moscow, Russia
Grigory M. Sisoev
Plekhanov Academy, Moscow
Department of Mechanics and Mathematics, Moscow State University
A.E. Koulago
Moscow State University, Department of Mechanics, Academy Plekhanov, Moscow, Russia
The linear stability of two−layer film flow on an inclined plane and on the surface of a rotating disk is examined. Two types of instability are investigated. One corresponds to the existence of the boundary between liquids and another type is similar to that examined for one−layer films and it is formed due to the free surface.