Abstract

An investigative approach on study of a laminar natural heat convection on different geometric annuluses under impact of a constant magnetic field, using Ferro-Nano has been carried out. The three different cases of vertical cylindrical, cubic, and twisted cubic geometries, each are presented by a 3D model. These geometries are affected by a magnetic field which affects the variables such as heat transfer, natural heat convection, and entropy generation will be investigated. The chosen approach for this article is a numerical calculation, including Energy equations, Electrical potential equation, Hartmann number, Rayleigh, and Nusselt number. Results gathered by current study indicate that magnetic field is the primary reason of natural convection reduction phenomenon on each of the presented geometries. In the end it was illustrated that the average heat transfer has been reduced to 0.6% when the magnetic field is applied. Moreover, on the subject of the geometry amends, the twisted cubic had the highest amount or reduction of all the considered cases.

摘要

使用 Ferro-Nano 研究了在恒定磁场影响下不同几何环面上的层流自然热对流的研究方法。垂直圆柱形、立方体和扭曲立方体几何的三种不同情况，每一种都由 3D 模型呈现。这些几何形状受磁场影响，磁场会影响传热、自然热对流和熵产生等变量。本文选择的方法是数值计算，包括能量方程、电势方程、哈特曼数、瑞利和努塞尔数。当前研究收集的结果表明，磁场是每个呈现的几何形状上自然对流减少现象的主要原因。最后表明，当施加磁场时，平均传热已降低到 0.6%。此外，关于几何修正的主题，扭曲的立方体在所有考虑的案例中数量最多或减少最多。