Investigation of convective heat transfer characteristics in ventilated walls with non-isothermal vertical wall-attached jets

The non-isothermal wall-attached jet nocturnal ventilation system demonstrates particular suitability for hot summer and cold winter zone exhibiting minimal diurnal temperature fluctuations and high outdoor static air rates. Due to the dynamic heat storage and release characteristics of the nocturnal ventilation wall, a temperature difference emerges between the interior wall surface of the wall and the adjacent jet flow in actual conditions. This thermal gradient initiates buoyancy-induced plume formation, resulting in its convective heat transfer characteristics being different from those of air conditioning environments. This study adopts a combined experimental and numerical simulation approach to investigate convective heat transfer characteristics in ventilated walls with non-isothermal vertical wall-attached jets under both forced convection and mixed convection scenarios. Based on experimental and simulation results, this paper employs regression analysis to revise the existing correlations for forced convection and mixed convection over flat plates, establishing the adapted correlations for the vertical wall-attached jet scenario.