Influence of radiation effect on turbulent natural convection in cubic cavity at normal temperature atmospheric gas

Reduced-order modelling of radiative transfer effects on Rayleigh–Bénard convection in a cubic cell

“…The convection intensification with radiation in the weakly turbulent regime seems to contradict the stabilising effect described at low Rayleigh numbers. Interestingly, the same observations have been reported in differentially heated cavities where radiation is found to promote the turbulence in the unsteady regime (Soucasse, Rivière & Soufiani 2016;Kogawa et al 2017), while the onset of convection is delayed (Borget et al 2001). It should be finally mentioned that surface-to-surface radiation can also affect RBC, as shown for instance by Czarnota & Wagner (2016), who consider radiative and conductive horizontal plates.…”

Red Neuronal Artificial aplicado para el pronóstico de eventos críticos de PM2.5 en el Valle de Aburra.

“…La variación de la radiación solar incidente en la superficie de la Tierra afecta profundamente los procesos dinámicos y termodinámicos a nivel global, debido a su relación con el balance de energía y los flujos de calor latente y sensible [24]. Por otra parte, éste parámetro cumple un papel importante en los procesos turbulentos y de dispersión de contaminantes en la atmosfera [25].…”

Low-order models for predicting radiative transfer effects on Rayleigh–Bénard convection in a cubic cell at different Rayleigh numbers

“…However, in the case of thermally driven flow, radiation also affects the mean temperature gradient and buoyant motion. Several researchers have reported an increase of the mean kinetic energy of the flow due to an increase of the mean potential energy in various configurations involving a radiating gas: in a differentially heated cavity (Kogawa et al 2017), in a Rayleigh-Bénard cavity (Soucasse, Rivière & Soufiani 2014a) or for a confined plume generated by a linear heat source (Wang et al 2020). The cost of radiative transfer computations in a turbulent medium restricts the numerical investigation of radiation effects due to the angular, spectral and spatial dependence of the radiation field.…”

“…Several researchers have reported an increase of the mean kinetic energy of the flow due to an increase of the mean potential energy in various configurations involving a radiating gas: in a differentially heated cavity (Kogawa et al. 2017), in a Rayleigh–Bénard cavity (Soucasse, Rivière & Soufiani 2014 a ) or for a confined plume generated by a linear heat source (Wang et al. 2020).…”