Combined convection from isothermal cubical cavities with a variety of side-facing apertures

Using CFD and ray tracing to estimate the heat losses of a tubular cavity dish receiver for different inclination angles

“…As far as convective heat losses are concerned, Pavlovic and Penot (1991) and Clausing et al (1989) studied mixed convection in an isothermal open cubic cavity experimentally. Pavlovic and Penot (1991) determined Nusselt-Grashof-Reynolds number correlations for different inclinations for temperatures up to 120 °C, while Clausing et al (1989) determined Nusselt-Richardson number correlations for temperatures up to 350 K for various side-facing apertures to the cavity. For these low temperatures, radiation heat losses were not dominant.…”

Study of heat transfer through a cavity receiver for a solar powered advanced Stirling engine generator

“…The density of the air is a function of temperature and pressure. Air enters from the aperture opening to the cavity and gets heated from the hot absorber surface and due to density gradient light air flows out from the cavity receiver resulting convective heat losses [6,7].…”

The influence of wind speed, aperture ratio and tilt angle on the heat losses from a finely controlled heated cavity for a solar receiver

“…The ratio of the aperture diameter to that of the cavity has a strong influence on the re-radiation and convection losses from the cavity (Clausing et al, 1989;Clausing et al, 1987;Kim et al, 2009;Steinfeld & Schubnell, 1993;Wu et al, 2010;Wu et al, 2011). The effect of the aperture size on the convective heat loss from a heated cavity was first reported by Clausing et al, 1989;1987, who found that both size and configuration are critical parameters. However, this study only considered natural convection, at zero wind velocity.…”