TY - JOUR AU - Nasrin, Rehena AU - Alim, MA PY - 2012/05/26 Y2 - 2024/03/29 TI - Laminar Free and Forced magnetoconvection through an Octagonal Channel with a Heat Generating Circular Cylinder JF - Journal of Naval Architecture and Marine Engineering JA - J. nav. arch. mar. engg. VL - 9 IS - 1 SE - Articles DO - 10.3329/jname.v9i1.7891 UR - https://www.banglajol.info/index.php/JNAME/article/view/7891 SP - 25-34 AB - <p>In this paper, hydromagnetic flow and thermal behaviors of fluid on free and forced convection inside an octagonal vertical channel are investigated. The channel consists of a centered heat generating hollow solid circular cylinder. The vertical and inclined walls of the octagon are insulated perfectly. The input and output opening are situated at the bottom and top surface respectively. The octagon is filled with electrically conducting fluid. The integral forms of the governing equations are solved numerically using Galerkin’s Weighted Residual Finite Element method. Computational domains are divided into finite numbers of body fitted control volumes with collocated variable arrangement. Results are presented in the form of average Nusselt number (<em>Nu</em>) and maximum temperature (<em>?<sub>max</sub></em>) of the fluid for a selected range of magnetic parameter Hartmann number <em>Ha </em>(0 - 50). Streamlines and isothermal lines are also displayed for three different values (0.1, 1 and 10) of convection parameter (<em>Ri</em>) and for a fluid having magnetic field. The results indicate that the highest <em>Nu </em>and <em>?<sub>max </sub></em>are found for the absence of <em>Ha </em>in all convection regions.</p> <p>DOI: <a href="http://dx.doi.org/10.3329/jname.v9i1.7891">http://dx.doi.org/10.3329/jname.v9i1.7891</a></p> <p><em>Journal of Naval Architecture and Marine Engineering</em><em> </em>9(2012) 25-34</p> ER -