SIMULATION OF FLOW AND MASS TRANSFER OVER A CYLINDER

摘要

For simulation Fluent code was used in order to predict the flow parameters, as well asthe mass flow rate, that is a very important. Consider the unsteady state case of a fluid flowing pasta cylinder, as illustrated above. For this study it will use a Reynolds Number of 120. In order tosimplify the computation, the diameter of the pipe is set to 1 m, the x component of the velocity is setto 1 m/s and the density of the fluid is set to 1 kg/m . Thus, the dynamic viscosity must be set to8.333 x 10~(-3) kg/m*s in order to obtain the desired Reynolds number. For anexternal flow problem like this, one needs to determine where to place theouter boundary. A circular domain will be used for this simulation. Theeffects that the cylinder has on the flow extend far. Thus, the outerboundary will be set to be 64 times as large as the diameter of thecylinder. That is, the outer boundary will be a circle with a diameter of 64m. The main conclusion is that the mass flow rate increases polynomialwith the initial air rate. This allows thinking that the mass flow ratebetween a solid and a real gas could be predicted numerically with asufficiently high precision.