PSI - Issue 73

Vladimira Michalcova et al. / Procedia Structural Integrity 73 (2025) 106–111 Author name / Structural Integrity Procedia 00 (2025) 000–000

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Fig. 5. Vertical velocity profiles.

5. Conclusion The article introduces the reader to a problem focused on numerical simulation of convective heat transfer from the warm surface of a planar structural element. Changes in the temperature and velocity field of the air above the wall of the element are monitored. In a 2D problem, an incompressible non-isothermal flow is modelled here. The results are evaluated for two air flow velocities. The calculation demonstrated the ability to describe the expected trends in the temperature and velocity fields, especially the effect of velocity on the action of buoyancy forces. The authors thus assume that the model is ready for a more detailed study and the possibility of validation with experimental data. Follow-up research will be expanded to include a higher number of velocities, which are expected to have an effect on convection, and to verify the results with the already mentioned experimental research in Chapters 1 and 2. Acknowledgements This work was supported by the Ministry of Education, Youth and Sports of the Czech Republic through the e-INFRA CZ (ID:90254). References Awol, A., Bitsuamlak, G. T., & Tariku, F. (2020). Numerical estimation of the external convective heat transfer coefficient for buildings in an urban-like setting. Building and Environment , 169 , 106557. https://doi.org/10.1016/j.buildenv.2019.106557 Blocken, B., Defraeye, T., Derome, D., & Carmeliet, J. (2009). High-resolution CFD simulations for forced convective heat transfer coefficients at the facade of a low-rise building. Building and Environment , 44 (12), 2396–2412. https://doi.org/10.1016/j.buildenv.2009.04.004 Defraeye, T., Blocken, B., & Carmeliet, J. (2010). CFD analysis of convective heat transfer at the surfaces of a cube immersed in a turbulent boundary layer. International Journal of Heat and Mass Transfer , 53 (1–3), 297–308. https://doi.org/10.1016/j.ijheatmasstransfer.2009.09.029 Incropera, F. P., & DeWitt, D. P. (1996). Fundamentals of Heat and Mass Transfer (6th ed.). John Wiley & Sons. https://doi.org/10.1016/j.applthermaleng.2011.03.022 Kočí, J., Navara, T., Maděra, J., Trush, A., Cacciotti, R., Pospíšil, S., & Černý, R. (2025). Analysis of the Effect of Relative Humidity on the Convective Heat Transfer Coefficient Using Full-Scale Experiments in a Climatic Wind Tunnel. Energies 2025, Vol. 18, Page 810 , 18 (4), 810. https://doi.org/10.3390/EN18040810 Mahgoub, S. E. (2013). Forced convection heat transfer over a flat plate in a porous medium. Ain Shams Engineering Journal , 4 (4), 605–613. https://doi.org/10.1016/j.asej.2013.01.002 Montazeri, H., & Blocken, B. (2018). Extension of generalized forced convective heat transfer coefficient expressions for isolated buildings taking into account oblique wind directions. Building and Environment , 140 , 194–208. https://doi.org/10.1016/j.buildenv.2018.05.027 Shishkina, O., & Wagner, C. (2011). Modelling the influence of wall roughness on heat transfer in thermal convection. Journal of Fluid Mechanics , 686 , 568–582. https://doi.org/10.1017/jfm.2011.348 Zheng, L., Chong, A., Poh, H. J., & Sekhar, C. (2024). Impact of building porosity on exterior convective heat transfer coefficients: An experimental and computational parametric study. Building and Environment , 247 , 111023. https://doi.org/10.1016/j.buildenv.2023.111023