Salman, Y., & Mohammed, H. (2007). Free Convective Heat Transfer with Different Sections Lengths Placed at the Exit of a Vertical Circular Tube subjected to a Constant Heat Flux. Al-Khwarizmi Engineering Journal, 3(3), 31-52. Retrieved from http://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/631