2D blood flow problem
 

Hi everyone,

I am quite new to CFD so I'm sorry if for someone it's a stupid question. I am stuck with a problem with Fluent 16.1, my simulation is just wrong in terms of result. I have spent quite a lot of time on trying to resolve it but I am not able to figure out what is wrong.

The CFD study is: 2D steady state blood flow on a coronary artery (density=1066 kg/m3, viscosity 0.0035 kg/ms). I have gone through all the steps in ansys workbench (from creating the geometry to fluent).

Once in Fluent I prescribe my boundary conditions as pressure-inlet (13333Pa) and pressure outlet (Gauge pressure = 12000Pa), wall no slip conditions. Results of the simulations are shown in the first image attached. Looking at fluxes I noticed the inlet mass flow rate is equal to 1.89 kg/s, the magnitude is completely wrong, 1.89kg/s is not physiological at all, I would have expected mass flow rate of 0.003/0.0025 Kg/s. What is happening here?

It seems like a dimension problem but I defined the mesh to be in mm and checking the scale mesh panel this seems correct.

So, does anyone have an idea of what is going on? or where is the error in my workflow? :confused::confused:

Thanks.