Nowadays, one of the biggest challenges in foams industries is designing based on the performance features. Therefore, simulation or exact solution of traort equations is the first step in designing the foams, which has numerous difficulties due to structure complexity of the foams. Hence, most of the numerical studies were performed on the ideal or unrealistic structure of the foams such as Kelvin model. Using these simple methods is due to the difficulties in creating the real structure of the foams and meshing of them. Therefore in this study, simulation of hydrodynamic and thermal behavior of fluid on metallic foams with real structure was surveyed using hexahedral computational grid. For this purpose, continuity, heat and momentum transfer equations for a fluid inside the porous media of the foam (with 85, 90, 95 and 98 porosity percent) were solved by finite volume algorithm. The results showed, the linear and non-linear term coefficients of the pressure gradient equation ( ) vary between and , respectively. Also, conductive heat transfer has a great dependency to the thermal conductivity coefficient of the solid matrix. On the other hand, the heat in forced convection was transferred in a short length of the bed and after that the thermal equilibrium between fluid and the solid was established. The curve of friction factor vs. Reynolds number diagram showed that for Re 1 the flow is laminar, While for Re 1 the fluid has a transient behavior. Meanwhile, transient Reynolds number change with porosity by performing a thermal gradient to the fluid. Also, based on the microscopic view, a new correlation for Nusselt number (Nu), using the geometric specification of the foams was developed. In the microscopic view, the limitation of previous models such as lack of attention to the geometry of the foam was eliminated. On the other hand, the injection of a particle in porous media and observation of its path was the basis of tortuosity ( ) survey. According to the results, the was decreased by increasing the porosity in the foam. Also, the is a mean value for traveled path by fluid related to the length of foam (according to the direction of fluid flow) and has different values in various directions, which is due to the heterogeneous distribution of the pores in the foam. Therefore, this study can be brought up as a new field and method for designing the foams for different application. Keywords: Foam, Simulation, Hexahedral, Pressure gradient, Nusselt number, Tortuosity