When water vapor in moist air reaches supersaturation a transonic flow system, non-equilibrium condensation forms large number of droplets which may adversely affect the operation some thermal-hydraulic equipment. For better understanding this condensing phenomenon, numerical model is applied to analyze system by using theory nucleation and droplet growth. The Benson adopted correct liquid-plan...

We introduce an analog model for the conformally coupled scalar field on BTZ black hole. The is based propagation of acoustic waves in a Laval nozzle. Since hole not globally hyperbolic spacetime, dynamics well defined until extra boundary conditions are prescribed at its spatial infinity. show that quasinormal modes (QNMs) satisfying Dirichlet, Neumann, and Robin can be interpreted terms ordin...