November 18, 2020 at 2:58 pmValenjinSubscriberHello!nIm very new to ansys and i was wondering if in order to simulate bloodflow in a artery i can simplay say the inlet speed is 0,91 m/s (thats the average speed at the heart) and then for the pressure i create a function with high value of 0,159 bar and a low value of 0,106 bar.nnAnd that way have the flow through the artery depending on the heartbeat. Does that sound logical? I wasnt sure how else to approach it yetnnThanks in advance, have a great week!nnValenjinn
November 18, 2020 at 4:05 pmRobForum ModeratorYou'd either fix the flow rate (normally done) or the inlet pressure. You just need to work out the inlet velocity as a function of time. Expressions will do the job, as will a UDF, DEFINE_PROFILE.
November 18, 2020 at 4:41 pmValenjinSubscriber.
thanks for the reply! I have one more question maaaaybe you can help me out on this too.
In all the tutorials i see that i can select Carreau as the visocity model. However i cannot find it in my ansys and also i cant find anywhere if it is an addin that i need to download. Do you know anything about that?
November 18, 2020 at 4:45 pmRobForum ModeratorTurn the turbulence (viscous) model to laminar. NonNewtonian viscosity and turbulence does work together but is physically somewhat dubious. You can reactivate it, but I'll leave you to find the commands in the manual (which do come with some warnings). Blood flow is laminar, but expect to have some discussions with the medical community about that: they have a different definition for turbulence.
November 18, 2020 at 4:52 pmValenjinSubscriberYou are my hero Rob! Enjoy your evening.
November 18, 2020 at 4:54 pmRobForum ModeratorThanks, you too. Some bedtime reading for you:
Gijsen F.J.H., van de Vosse F.N., Janssen J.D.; 1999; The Influence of the non-Newtonian properties of blood on the flow in large arteries: steady flow in a carotid bifurcation model; Jou of Biomechanics, Vol 32, pp601
August 12, 2021 at 7:13 am
August 12, 2021 at 9:04 amRobForum Moderator.
No. The terms we agreed to when we obtained the scan specifically covered where and how the geometry was to be used.
Materialise may have a geometry available as they were building a database of body parts for academic research. Otherwise you'll need a scan and software to extract the DICOM data: if the scanner doesn't do that Materialise and Simpleware produce software to do this..
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