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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.

A study on the impacts that altered geometries containing a Ferro-Nano fluid affected by a magnetic field could have on a device natural convection