Foam is called the distribution of gaseous phase in a liquid or solid phase. But the foam, in fact, is the solid material that have a cellular structure and for high porosity materials most commonly called sponge. Such properties that noted for foams is high porosity, low pressure drop, high thermal conductivity and mass transfer coefficient. So the aim of this study was to measure the mass transfer coefficients and parameters affecting it. As one of the important terms in the mass convection is fluid flow, the fluid flow and geometric parameters influencing it investigated and then the impact of these geometric factors on mass transfer coefficient were identified. For this reason foams at different length, percent porosity and pore diameter were built in Geodict software and then the fluid flow was simulated by using Computational Fluid Dynamics. The results showed that at fixed pore diameter by changing the porosity the velocity of fluid flow within the foam were increased. The increase depending on the porosity of between 6% and 50%, respectively. Also by study the effect of foam length was observed that with the increasing foam length, pressure gradient has decrease up to the critical length value and then it was constant. In fact it was shown that when the critical length to pore diameter ratio is more than 20, the pressure gradient were constant. On the other hand, that the porosity does not affect on the amount of this critical length but change of the pore diameter has a significant effect the critical length. Change of foam length cause the changes Darcy and non-Darcy coefficient in Forchheimer equation. Therefore the mathematical relationship to change the coefficients based on geometrical parameters was presented. The incompatibility average of this coefficient with simulated number is 7% for Darcy coefficient and 10% for non-Darcy coefficient. Also in study of mass transfer coefficient in foam was observed by inceasing the flow velocity, the mass boundary layer thickness decrease and this factor cause increasing the mass transfer coefficient and other words, by increasing flow velocity the Sherwood number were increased. Also, regarding the effect of geometrical parameters on the boundary layer thickness or the mass transfer coefficient was observed that the porosity does not have much effect on the thickness of the boundary layer. However, the effect of the change pore diameter on this boundary layer thickness was extremely large.