Transient entropy generation analysis of vortex liquid isolated by hollow heated cylinder

The total transient entropy generation of a system that consists of a liquid vortex within a hollow cylinder as a heat source is investigated in this article. The hollow cylinder insulates the liquid vortex, and generates an air vacuum above the vortex which raises its level within the cylinder. The liquid vortex, at a volume of 20% and 60%, partially fills the hollow cylinder. In both cases, the heat transfer was partially established between the inner surface of the hollow cylinder and the vortex liquid. This analysis focused on the transient exchange of entropy generation between the cylinder and fluid. The heat exchange between the hollow heated cylinder and the fluids takes 15 s. The analysis of entropy generated includes only thermal irreversibility of this system; hydraulic irreversibility is neglected.