Fluent blood flow BC
 

I am working on a project involving pulsatile blood flow simulations (using FLUENT) through Z stent device used to cure Abdominal Aortic aneurysms. I am able to obtain inlet boundary conditions, in terms of pressure profile and velocity, but I am not sure what to use for my outlet conditions. The device is about 17cm long and I don't have enough information about the variation in pressure and/or velocity along this short distance. I would be grateful, if anyone could suggest some solution. Thanks.

Re: Fluent blood flow BC
 

Since the mean vascular pressure is 90 mmHg, and it is in AAA, I think you can assume the outlet pressure is 90 mmHg.

But I am not familiar with Fluent, I used FIDAP. Your question make me think another question:

In FIDAP tube flow examples, why there is no oulet boundary condition added? or their default is the outlet P* is zero?

Re: Fluent blood flow BC
 

Hi. I am working on the pulsatile blood flow through stnosed arteries. I am curious as to what kind of pusatile conditions you use at the inlet (For eg. Do you use a sinusoidal velocity profile at inlet)? I have prescribed outlet B.C. as press outlet. But it does not seem to give me good results. Let me know if you come across something that works.

Re: Fluent blood flow BC
 

i guess you use outflow boundary conditions, if you donot know the conditions at the outlet.

Re: Fluent blood flow BC
 

I'm trying to imitate realistic flow profile for the abdomen region, which is looks like damped sinusodial oscillation. But i still haven't fully developed the model.