From catʼs eyes to multiple disjoint natural convection flow in tall tilted cavities: A direct primitive variables approach

A comprehensive review on natural convection flow and heat transfer

“…They obtained average Nusselt number in terms of Rayleigh number for both laminar (10 2 < Ra < 10 6 ) and turbulent natural Natural convection flow and heat transfer convection (10 4 < Ra < 10 8 ) for different aspect ratios in range of 20 to 80 which can be used in engineering applications such as insulating units façade elements, etc. Báez and Nicolás (2013) numerically studied the natural convection within the tall tilted cavities filled with air, shown in Figure 18. This work investigated the cat's eye instabilities and multiple disjoint cells during natural convection respect to variation of aspect ratios (A) and angles of inclination (w ) using a new direct projection method on the Boussinesq approximation in primitive variables.…”

“…It was observed that the fluid flow as Rayleigh number is in range of Ra < 10 4 , but it became instable with increasing of Rayleigh number, so that 3D motions play important role as Rayleigh number is larger that 10 4 . The interferometry technique A schematic of considered geometry by Báez and Nicolás (2013) HFF 29,3 revealed that there is temperature drop near the walls, but the temperature field is uniform at the center of the cavity. Kizildag et al (2014) assessed the limitation of the Oberbeck-Boussinesq approximation for simulation of turbulent natural convection within a tall cavity filled with water and heated partially from side wall.…”

Numerical simulation of multicellular natural convection in air-filled vertical cavities

“…The detailed scenario of transition was proposed, and the value of Ra crit  5.810 3 was reported. Numerical results for natural convection in vertical cavities filled with air were obtained also in [8] (A = 12 ÷ 20, the effect of layer inclination was also studied in the paper). It was reported that at Ra = 1.1×10…”