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Fluid Flow, axial problem
Posted Nov 22, 2016, 12:09 p.m. EST Fluid & Heat, Computational Fluid Dynamics (CFD), Geometry, Studies & Solvers Version 5.1 0 Replies
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I am a new user to Comsol Multiphysics. My goal is to simulate a fluid flow through a cylinder and then compare the results with some experimental ones. This fluid is non-newtonian and laminar. For the geometry, a 2d-rectangle is drawn near a symmetry line, with radius equals to 0,0254/2 [m]. Its width is 6 [m]. One of its edges belongs to this line, in this case one of the biggest ones. The rectangle is vertical, and the inlet wall consists on the lower basis, while outlet comprehends the upper.
Setting the initial values, the mass rate is 1.4 [kg/s] for inlet and pressure 101325 [Pa] for the outlet wall. No slip for the other ones and backflow might be suppressed. All of those information was set in the fluid flow part, like it is registered here. Density is equal to rho=997,5 [kg/m³] and viscosity mu=0,00093210000000 [Pa.s].
After running the simulation, it is necessary to evaluate average pressure in a line 2 [m] distant from entrance and in another one 2 [m] distant from the latter, or 4 [m] from inlet wall. Nevertheless, the information given by the problem set is not accurate. The parable velocity x arc lenght is disform, and also the pressure values are not converging to the experimental ones. What can I do to solve this correctly?
Hello Cairo Martins da Silva
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