## 1 Introduction  
With the worldwide need for sustainable development, double skin facades were developed like strategies and technologies for decreasing the operational consumption of energy during a building's life cycle. Double Skin Facades (DSF) are building envelopes composed of two layers of glass separated by a ventilated air channel that acts as a thermal agent to improve indoor thermal comfort. Numerous experimental and numerical studies have been conducted mainly in countries where these facades have been widely applied. More publications are related to experimental studies carried out on test facilities, under real weather conditions. [PERSON] et al. [1] present extensive experiments on an active transparent facade, mechanically ventilated, in Italy. [PERSON] et al. [2] present measurements carried out at the Vliet test building of the Laboratory of Building Physics in Leuven, Belgium. It was shown that the location of the inlet air, airflow rate, and airflow distribution are important parameters that affect the performance of a DSF. These types of measurements are also presented by [PERSON] [3]. Using TWINS, the test facility for experimental investigation, a methodology was proposed to assess the energy performance of active transparent facades. Also, using the Permasetelisa campus, equipped with full-scale test rooms, [PERSON] [4] con ducted experimental research on DSF, in terms of both energetic consumption and internal environmental conditions. Many studies have been performed in situ, on real buildings, by monitoring parameters for long periods of time (minimum one year) [5], determining the behavior of the facade under the influence of different climatic conditions and occupant perception on overall comfort. In general, such studies are the only ones that can provide information on the global interaction of the facade with the occupied building. Given that in situ monitoring requires restricted areas for the tests and periodic inspections of devices, experimental models are tested in the laboratory or in situ by building rooms subject to outdoor climate conditions. Experimental studies on ventilated facades and fully glazed double skin type were carried out in laboratory conditions [6; 7; 8]. In addition, [PERSON] et al. [9] performed an experimental study in laboratory conditions, on a full-scale facility of DSF equipped with Venetian blinds, to minimize the radiation transmitted during the hot season to avoid overheating. Due to the transient and complex air flow in the facade channel, the influence on the indoor environment and energy consumption is challenging to evaluate. Therefore, Computational Fluid Dynamics (CFD) can play an essential role in assessing and improving the thermodynamic behavior of a double skin facade. [PERSON] et al. [10] presented a mathematical model to study the energy performance of a ventilated facade. [PERSON] et al. [11] investigated the influence of glazing types and ventilation principles in double skin facades on delivered heating and cooling energy during the heating season. [PERSON] et al. [12] studied by CFD techniques the effects of opening configurations on airflow behavior, showing that the ratio between the areas of the front and lateral openings is a critical factor for improving the ventilation in the cavity at the wind incident angle between \(0^{\circ}\) and \(30^{\circ}\). Also, it was concluded that employing three front openings on the external skin of DSF can increase the system's effectiveness in a broader range of wind direction and cavity size. Recently, [PERSON] et al. [13; 14] studied the naturally ventilated double-skin facade (NVDSF) with adjustable louvers. Using CFD techniques, they established the impacts of solar angle and intensity on natural ventilation rates, concluded that louvers can enhance or weaken natural ventilation compared to those without louvers. In all studied cases, it was concluded that adding a DSF zone to the south wall of the building leads to the decrease of delivered heating energy.