Adiabatic heating and convection caused by a fixed-heat-flux source in a near-critical fluid.
Dynamics and heat transfer in a near-critical fluid in a square cavity with a finite heat source located at the bottom are studied numerically. A thermally insulated enclosure and a fixed-heat-flux source are considered. The two-dimensional simulation is based on the full Navier-Stokes equations with two-scale splitting of the pressure and the van der Waals equation of state. It is shown that the piston effect is independent of convection. Near the critical point, this effect becomes independent of criticality and convective motions are damped.
Soboleva
E B
EB
Institute for Problems in Mechanics, Russian Academy of Sciences, Prospect Vernadskogo, 101, b.1, 119526 Moscow, Russia. soboleva@ipmnet.ru