Singh, H., C. K. Mangrulkar, Sanjeev Kumar Shah, Alok Kumar, N.D. Pal, Yashwant Singh Bisht and Sunil Chamoli 2026. Numerical Study of heat transfer characteristics of Rectangular channel with combined roughness. Journal of Research and Applications in Mechanical Engineering. 14, 3 (Sep. 2026), JRAME–26.