Experimental observations of the thermal flow around a square obstruction on a vertical wall in a differentially heated cavity

An experimental study of the unsteady thermal flow around a thin fin on a sidewall of a differentially heated cavity

“…Accordingly, in the present paper an experimental investigation at high Rayleigh numbers is described in an attempt to find a way to trigger instabilities of the thermal flow using a fin and in turn generate unstable flows adjacent to the finned sidewall. In contrast to the experiments reported in Xu et al (2006), a larger thin fin with a cross-section of 0.04 m  0.002 m is attached at the mid height of the heated sidewall with the expectation that an instability in the boundary layer downstream of the fin will be generated as the flow bypasses the fin and reattaches to the boundary layer.…”

“…Bilgen, 2005). However, since unsteady natural convection in the cavity also has extensive applications in industry, recently, an experimental investigation of the transient thermal flow in a cavity with a small square fin on the heated wall at high Rayleigh numbers (Ra > 10 9 ) was performed by the present authors (Xu et al, 2006). It was found that the small square fin blocks the natural convection boundary layer flow and forces an intrusion to form beneath the fin.…”

Mixed Convection in a Vented Square Cavity with a Heat Conducting Horizontal Solid Circular Cylinder

“…Recently, conjugate natural convection heat transfer inside an inclined square cavity with an internal conducting block was carried out by Das and Reddy (2006). At the same time, Xu et al (2006) experimentally investigated the thermal flow around a square obstruction on a vertical wall in a differentially heated cavity. Zhao et al (2006) numerically investigated conjugate natural convection in enclosures with external and internal heat sources.…”

Effects of adiabatic extensions on heat transfer through a differentially heated square cavity

“…Instead, they rely on internally induced changes of the state of the natural convection flow to enhance heat transfer. Examples of passive enhancement include the use of heat sinks [13][14][15] and horizontal fins [16][17][18][19][20][21].…”