Time-dependent three-dimensional conductive heat transfer of flat plate and vertical cylinder with different thermal conductivity and heat source

This research aims to numerically analyze the temperature distribution in a geometry consisting of a rectangular cube piece and a cylindrical piece with different thermal conductivity coefficients. The studied geometry is in three-dimensional space and in the time interval of 0≤t≤0.01s and has been analyzed with special boundary conditions. The material of the rectangular cube piece is made of Copper-Aluminum Bronze material (95 % Cu, 5 % Al) and with thermal conductivity coefficientk1=83W/m.k, and the material of the cylindrical piece placed on the rectangular cube and in its center is made of Aluminum-Silumin material (87 % Al, 13 % Si) with a thermal conductivity coefficientk2=164W/m.k. The boundary conditions of the rectangular cube piece are assumed so that the lower face and the two side faces facing each other have a constant heat flux (Dirichlet boundary condition), and the upper face and the other two faces facing each other are low-temperature faces. The side face is insulated in the cylindrical piece, and the upper face is considered high-temperature. The upper side of the rectangular cube piece and the connection point of the cylindrical piece also have a low temperature. All dimensions of the desired geometry are taken into account at the micro level. The results show that by choosing the parts that have a higher thermal conductivity but have a smaller volume and are located in the upper part of the geometry and its upper face has a high temperature, the temperature distribution is done in a fraction of a second and the heat has also spread to the lower part.