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Blood Flow in Aneurysm (Sack off of main artery)
Posted 2018年1月6日 GMT-5 15:16 Fluid & Heat, Computational Fluid Dynamics (CFD) 0 Replies
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Hello,
I am currently using Comsol in my PhD and I am quite stuck on a problem and any help would be very much appreciated. I am trying to simulate the laminar blood flow through a pseudaneurysm in the common femoral artery and I am struggling to recreate the flow conditions seen in experimental and clinical environments.
To start I setup the geometry as a "golf ball on a stick" off of the main artery (Figure 1). Then I setup a pulsatile inlet flow velocity using a peicewise function (Figure2). Since we have large flow rates and large vessels I am assuming the viscosity is Newtonian with a value of mu = 0.0035Pa.s which is correct for blood. I have also included a volume force to account for gravity, which I'm not sure is correct.
Basically my main issue is that very little/no flow is actually entering the large sack off of the artery, however I know from experimental results that flow does indeed enter the sack at ~50cm/s. However I am constantly getting values of 10e-9 cm/s in the sack even at the maximum inlet velocity (Figure3). If you could give us any advice on this it would be of much much much help!
Attached is the .mph file.
Thanks and all the best, Gilad
Attachments:
Hello Gilad Amzaleg
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