The work examines the heat exchange characteristics of a condenser in which removal refrigerant condensation occurs due to natural convection and radiation cooling. exchanger is designed reduce energy costs for heat. Unlike traditional air cooling condensers, it uses cooling, method based on its transmission form infrared through planet’s atmosphere into surrounding outer space. A calculating t...

Using a linear stability analysis and two and three-dimensional nonlinear simulations, we study the physics of buoyancy instabilities in a combined thermal and relativistic (cosmic ray) plasma, motivated by the application to clusters of galaxies. We argue that cosmic ray diffusion is likely to be slow compared to the buoyancy time on large length scales, so that cosmic rays are effectively adi...

Linear stability of double diffusive convection of Darcy-Maxwell fluid with Soret and Dufour effects is investigated. The effects of the Soret and Dufour numbers, Lewis number, relaxation time and solutal Darcy Rayleigh number on the stationary and oscillatory convection are presented graphically. The Dufour number enhances the stability of Darcy-Maxwell fluid for stationary convection while it...

We study asymptotic behavior of the global attractors to the Boussinesq system for Rayleigh-B enard convection at large Prandtl number. In particular, we show that the global attractors to the Boussinesq system for Rayleigh-B enard convection converge to that of the in nite Prandtl number model for convection as the Prandtl number approaches in nity. This o ers partial justi cation of the in ni...

In this study, a numerical study of transient combined natural convection and surface radiation in cylindrical cavity with heated plate placed inside is carried out using the open-source platform OpenFOAM. The effects Rayleigh number (105 ? Ra 107), inclination angle (0? 90?), emissivity (0 1) on velocity components, temperature field, Nusselt are investigated detail. Results show that has grea...