In a manuscript the results of research of the characteristics of a flat air stream with a variable mode of its flow into the room depending on time and current position are presented. Analytical equations for calculating the flat air jet parameters were derived. Numerical modeling of the incoming air stream in the variable mode was carried out due to CFD FLUENT (ANSYS FLUENT) software using the k–ε turbulence model. Method of a four-parameter numerical simulation of the flat incoming airflow in the variable mode is devised.
N. A. Buyak, V. I. Deshko, and I. O. Sukhodub, “Buildings energy Use and human thermal comfort according to energy and exergy approach,” Energy Build., vol. 146, pp. 172–181, 2017.
V. Korbut, O. Voznyak, K. Myroniuk, I. Sukholova, and P. Kapalo, “Examining a device for air distribution by the interaction of counter non-coaxial jets under alternating mode,” East. Eur. J. Enterprise Tech., vol. 8, no. 86, pp. 30–38, 2017.
O. Voznyak, N. Spodyniuk, I. Sukholova, O. Savchenko, M. Kasynets, and O. Datsko, “Diagnosis of three types damages to the ventilation system,” Diagnostyka, vol. 23, no. 1, 2022, Art no. 2022102.
P. Kapalo, H. Klymenko, V. Zhelykh, and M. Adamski, “Investigation of indoor air Quality in the selected Ukraine classroom - Case study,” in Proceedings of CEE 2019, Lecture Notes in Civil Engineering, vol. 47. Cham: Springer, 2020, pp. 168–173.
M. Adamski, “Ventilation system with spiral recuperator,” Energy Build., vol. 42, no. 5, pp. 674–677, 2010.
O. Voznyak, N. Spodyniuk, I. Antypov, E. Dudkiewicz, M. Kasynets, O. Savchenko, and S. Tarasenko, “Efficiency improvement of eco-friendly solar heat supply system as a building coating,” Sustainability, vol. 15, no. 3, 2023, Art no. 2831.
L. Li, Y. He, W. Chen, Y. Ji, J. C. H. Fung, and A. K. H. Lau, “An integrated experimental and CFD analysis of ceiling-fan-integrated air conditioning system: Indoor air quality and air velocity,” Build. Environ., vol. 258, 2024, Art no. 111633.
O. Voznyak, O. Savchenko, N. Spodyniuk, I. Sukholova, M. Kasynets, and O. Dovbush, “Air distribution efficiency improving in the premises by rectangular air streams,” Pollack Period., vol. 17, no. 3, pp. 111–116, 2022.
L. Fang, D. P. Wyon, G. Clausen, and P. O. Fanger, “Impact of indoor air temperature and humidity in an office on perceived air quality, SBS symptoms and performance,” Indoor Air, vol. 14, no. Suppl. 7, pp. 74–81, 2004.
M. Aminzadeh, A. Safavinejad, and A. Zolfaghari, “Performance analysis of single and couple radiant heaters under asymmetric flow field for providing uniform conditions in an industrial environment,” Modares Mech. Eng., vol. 16, no. 5, pp. 396–402, 2016.
D. A. Krawczyk, A. Rodero, K. Gładyszewska-Fiedoruk, and A. Gajewski, “CO2 concentration in naturally ventilated classrooms located in different climates - Measurements and simulations,” Energy Build, vol. 129, pp. 491–498, 2016.
Z. Poorova and Z. Vranayova, “Humidity, air temperature, CO2 and well-being of people with and without green wall,” in Proceedings of EcoComfort 2020, Lecture Notes in Civil Engineering, vol. 100, 2021, pp. 336–346.
Y. K. Lee and Y. I. Kim, “Analysis of indoor air pollutants and guidelines for space and physical activities in multi-purpose activity space of elementary schools,” Energies, vol. 15, 2022, Art no. 220.
V. Dovhaliuk and V. Mileikovskyi, “New approach for refined efficiency sstimation of air exchange organization,” Int. J. Eng. Technol., vol. 7, no. 3.2, pp. 591–596, 2018.
O. Voznyak, O. Savchenko, N. Spodyniuk, I. Sukholova, M. Kasynets, and O. Dovbush, “Improving of ventilation efficiency at air distribution by the swirled air jets,” Pollack Period., vol. 17, no. 1, pp. 123–127, 2022.
H. Andersson, A. Kabanshi, M. Cehlin, and B. Moshfegh, “On the ventilation performance of low momentum confluent jets supply device in a classroom,” Energies, vol. 13, no. 20, 2020, Art no. 5415.
F. V. Barbosa, S. D. T. Sousa, S. F. C. F. Teixeira, and J. C. F. Teixeira, “Application of Taguchi method for the analysis of a multiple air jet impingement system with and without target plate motion,” Int. J. Heat Mass Transfer, vol. 176, 2021, Art no. 121504.
O. Voznyak, N. Spodyniuk, O. Savchenko, O. Dovbush, M. Kasynets, and O. Datsko, “Analysis of air jets velocity attenuation at special initial conditions,” Diagnostyka, vol. 23, no. 3, 2022, Art no. 2022308.
R. Zhang, X. Xu, K. Liu, L. Kong, W. Wang, and T. Wortmann, “Airflow modeling for building design: A designers’ review,” Renew. Sustain. Energy Rev., vol. 197, 2024, Ar no. 114380.
T. Cuciuc, C. Carnu, and B. George, “Computing of the Levavasseur type air-jet flat generator with two resonators,” Rom. J. Tech. Sci. Appl. Mech., vol. 56, no. 1, pp. 93–101, 2011.
P. Kapalo, S. Vilčeková, L. Mečiarová, F. Domnita, and M. Adamski, “Influence of indoor climate on employees in office buildings - A case study,” Sustainability, vol. 12, no. 14, 2020, Art no. 5569.
T. Pietrucha, “Ability to determine the quality of indoor air in classrooms without sensors,” E3S Web Conf., vol. 17, 2017, Art no. 00073.
O. Voznyak, K. Myroniuk, N. Spodyniuk, I. Sukholova, O. Dovbush, and M. Kasynets, “Air distribution in the room by swirl compact air jets at variable mode,” Pollack Period., vol. 17, no. 3, pp. 117–122, 2022.
I. Bullová, P. Kapalo, and D. Katunský, “Quantification of air change rate by selected methods in a typical apartment building,” Buildings, vol. 11, no. 4, 2021, Art no. 174.
S. Shcherbovskykh, N. Spodyniuk, T. Stefanovych, V. Zhelykh, and V. Shepitchak, “Development of a reliability model to analyze the causes of a poultry module failure,” Eastern-European J. Enterprise Tech., vol. 4, no. 3, pp. 4–9, 2016.
O. Voznyak, N. Spodyniuk, I. Sukholova, O. Savchenko, O. Dovbush, and M. Kasynets, “Increasing economic efficiency when creating a dynamic microclimate in compressed conditions of production premises,” Green. Low-Carbon Econ., vol. 00, no. 00, pp. 1–7, 2024.
I. Kousis, I. Pigliautile, and A. L. Pisello, “A mobile vehicle-based methodology for dynamic microclimate analysis,” Int. J. Environ. Res., vol. 15, pp. 893–901, 2021.
O. Voznyak, Y. Yurkevych, I. Sukholova, and K. Myroniuk, “Mathematical modeling of air distribution in a non-stationary mode by swirled-compact air jets,” in Proceedings of EcoComfort 2022, Lecture Notes in Civil Engineering, vol. 290, 2023, pp. 432–440.
J. Ferdyn-Grygierek and K. Grygierek, “Ventilation methods for improving the indoor air quality and energy efficiency of multi-family buildings in central Europe,” Energies, vol. 17, no. 9, 2024, Art no. 2232.
I. Bilous, V. Deshko, and I. Sukhodub, “Parametric analysis of external and internal factors influence on building energy performance using non-linear multivariate regression models,” J. Build. Eng., vol. 20, pp. 327–336, 2018.
S. Allmaras, “Multigrid for the 2-D compressible Navier-Stokes equations,” in Proceedings of the 14th Computational Fluid Dynamics Conference, Norfolk, VA, USA, November 1–5, 1999, 1999, Art no. AIAA-99-3336.
V. Mileikovskyi and T. Tkachenko, “Precise explicit approximations of the Colebrook-White equation for engineering systems,” in Proceedings of EcoComfort 2020, Lecture Notes in Civil Engineering, vol. 100, 2021, pp. 303–310.
H. Andersson, M. Cehlin, and B. Moshfegh, “Experimental and numerical investigations of a new ventilation supply device based on confluent jets,” Build. Environ., vol. 137, pp. 18–33, 2018.
B. Basok, B. Davydenko, S. Isaev, S. Goncharuk, and L. Kuzhel’, “Numerical modeling of heat transfer through a triple-pane window,” J. Eng. Phys. Thermophys., vol. 89, pp. 1277–1283, 2016.
G. Coleman, C. Rumsey, and P. Spalart, “Numerical study of turbulent separation bubbles with varying pressure gradient and Reynolds number,” J. Fluid Mech., vol. 847, pp. 28–70, 2018.
P. Spalart and H. Abe, “Empirical scaling laws for wall-bounded turbulence deduced from direct numerical simulations,” Phys. Rev. Fluids, vol. 6, 2021, Art no. 044604.
R. Wittmanová, J. Hrudka, I. Marko, A. Raczková, and Š. Stanko, “Dynamic modeling of flow in combined sewer network using the mouse model,” Pollack Period., vol. 17, no. 3, pp. 89–93, 2022.
M. L. Shur, P. R. Spalart, M. K. Strelets, and A. K. Travin, “Direct numerical simulation of the two-dimensional speed bump flow at increasing reynolds numbers,” Int. J. Heat Fluid Flow, vol. 90, 2021, Art no. 108840.
Ł. Amanowicz and J. Wojtkowiak, “Validation of CFD model for simulation of multi-pipe Earth-to-Air Heat Exchangers (EAHEs) flow performance,” Therm. Sci. Eng. Prog., vol. 5, pp. 44–49, 2018.
S. Kordana, K. Pochwat, D. Słyś, and M. Starzec, “Opportunities and threats of implementing drain water heat recovery units in Poland,” Resources, vol. 8, no. 2, 2019, Art no. 88.
K. Myroniuk, O. Voznyak, O. Savchenko, and M. Kasynets, “Mathematical modeling of an air flow leakage with the jets interaction at the variable mode,” in Proceedings of EcoComfort 2022, Lecture Notes in Civil Engineering, vol. 290, 2023, pp. 289–298.
D. Hargreaves and N. Wright, “On the use of the k-ε model in commercial CFD software to model the neutral atmospheric boundary layer,” J. Wind Eng. Ind. Aerodyn., vol. 95, pp. 355–369, 2007.
Y. Su, J. Shi, and Y. Wang, “Numerical simulation of cavitation of water jet nozzle based on realizable k-ε model,” Mechanika, vol. 28, no. 1, pp. 12–18, 2022.
O. Voznyak, N. Spodyniuk, O. Savchenko, O. Dovbush, M. Kasynets, and O. Datsko, “Analysis of premise infrared heating and ventilation with an exhaust outlet and flat decking air flow,” Diagnostyka, vol. 23, no. 2, 2022, Art no. 2022207.