Hilal, Kifah H., Salman H. Omran, and Muthanna L. Abdulla. “Effect of Solid Particle Properties on Heat Transfer and Pressure Drop in Packed Duct”. Al-Khwarizmi Engineering Journal 9, no. 2 (June 30, 2013): 33–47. Accessed January 4, 2026. https://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/166.