A heat exchanger is a device that is used to transfer thermal energy (enthalpy) between two or more fluids, between a solid surface and a fluid, or between solid particulates and a fluid, at different temperatures and in thermal contact. In heat exchangers, there are usually no external heat and work interactions. The aim of the present dissertation work focus on the design and thermal analysis of multiple shell and tube heat exchanger. Heat exchanger designed, justifying the phenomenon of convection within the shell and tubes. The study presents the linear static-steady thermal analysis of a multiple shell and tube heat exchanger using computational fluid dynamics approach. Altair HYPERMESH software is used to perform the analysis. The number of shell tubes, shell tubes arrangements at various angle, and temperature were considered as input parameters.