Bisht, Vijay Singh, Singh, Desh Bandhu, Kumar, Pushpendra, Bhandari, Prabhakar, Tipu, Rupesh Kumar, Singh, Sandeep ORCID: https://orcid.org/0000-0003-1854-3989 and Bist, Ankur Singh (2026) Investigation of Heat Transfer and Flow Characteristics in Solar Air Heaters with a Spherical Turbulator Using Machine Learning Models. Archives of Thermodynamics, 47 (2). pp. 99-118. Polish Academy of Sciences, Committee on Thermodynamics and Combustion . ISSN 1231-0956 Available at: https://doi.org/10.24425/ather.2026.158677