Steady two-dimensional solutions and their stability analysis are presented for thin film of a
thermoviscous liquid flowing inside a cylinder rotating about its horizontal axis. The inner
surface of the cylinder is either uniformly hotter or colder than the enveloping air. The mass,
momentum, and energy equations are simplified using thin-film approximation. The
analytically obtained film thickness evolution equation consists of various dimensionless
parameters such as gravitational number, Bond number, Biot number, thermoviscosity …