Numerical investigation of passive cooling in open vertical channels

Large Eddy Simulation of turbulent buoyancy-driven flow with alternating staggered heating walls

“…Details of this numerical scheme including its full derivation and implementation can be found in Refs. [8,9,21]. Two mesh distributions of 36 Â 509 Â 52 and 52 Â 609 Â 59 elements for cases with a fixed air gap distance of 0.1 m and 50 Â 509 Â 52 and 63 Â 609 Â 59 elements for cases with a fixed air gap distance of 0.16 m in the x-, y-and z-directions are assessed for mesh convergence.…”

Numerical and Experimental Investigation of Natural Convection in Open-Ended Channels with Application to Building Integrated Photovoltaic (BIPV) Systems

“…The inclined chamfers at the channel inlet have also been approximated using rectangular volumes. The mesh had already been shown to be adequate in a mesh convergence study Lau et al [5] for an open-ended channel configuration [12] with similar dimensions.…”

“…(2) to (4) and were solved numerically by using an in-house Navier-Stokes LES solver. It is a robust finite volume solver which is capable in handling buoyancy-driven flows and has been validated against many numerical and experimental studies [3,5,12]. A transient analysis was performed with a total of 60 000 time steps.…”

“…To investigate processes inside BIPV systems a considerable amount of research has been undertaken on uniformly-heated open channels [2][3][4][5]. The configuration with variable parameters, including the channel inclination angle, aspect ratio, and different values of the electric heat flux on boundaries, with two-or one-sided heating has been considered.…”

Numerical analysis of the most appropriate heat transfer correlations for free ventilated double skin photovoltaic façades

“…The situations with asymmetric boundary conditions were not analysed. In 2012, Lau et al [13] conducted a detailed analysis of natural convection in vertical channels by combining indoor experiments and numerical approximation based on Largeeddy simulations (LES) scheme. A new correlation for asymmetric uniform heat flux with adiabatic wall, under turbulent regime, was obtained.…”