Tamna, S., N. Koolnapadol, and S. Sripattanapipat. “Numerical heat transfer investigation in a round tube with wedge-shaped conical-rings”. Journal of Research and Applications in Mechanical Engineering 5, no. 1 (July 10, 2018): 2. accessed January 6, 2026. https://ph01.tci-thaijo.org/index.php/jrame/article/view/133659.