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-   -   Giving fluid properies (http://www.cfd-online.com/Forums/cfx/115857-giving-fluid-properies.html)

ami1991 April 8, 2013 12:05

Giving fluid properies
 
I am final year student doing a project in ansys cfx. I am modelling left coronary artery and studing the motion of blood in it. kindly help me on how to give the properties of blood in cfx...

ghorrocks April 8, 2013 18:28

Is your question how to model blood properties (ie you already know the properties you want to apply but do not know how to apply them) or do you have no idea what properties you should use to model blood (then the answer is to do a google search or a literature review and read about what other people have done).

ami1991 April 9, 2013 12:46

my question is what all properties are to be applied and how to apply them... kindly help me...

evcelica April 9, 2013 13:14

This is really, really basic. Have you even tried to do it yet? I'm sure you could figure it out in 2 seconds if you tried. In CFX pre, go to materials, right click, insert new material, and you can figure it out from there.

wethiq April 10, 2013 07:11

blood properties
 
Hi, the blood is non-Newtianon fluid i.e., the viscousity is function of rate strain therefore in Fluent select define > material and select nontainon fluid and selct model such as power_law and input constant.

ghorrocks April 10, 2013 07:21

There are many different rheologies used to model blood. Ressan mentions one.

But significant contributions occur due to the particles in the blood. In particular, the red blood cells stretch and squeeze to get through the tin capilliaries. Blood also has visco-elastic properties. Whether these are important depends on what you are trying to model.

ami1991 April 10, 2013 12:48

Quote:

Originally Posted by evcelica (Post 419477)
This is really, really basic. Have you even tried to do it yet? I'm sure you could figure it out in 2 seconds if you tried. In CFX pre, go to materials, right click, insert new material, and you can figure it out from there.

sir,
I have already tried working in ansys and i am still working. Its just that its a little confusing for first time user like me.

ami1991 April 10, 2013 12:49

Quote:

Originally Posted by ghorrocks (Post 419601)
There are many different rheologies used to model blood. Ressan mentions one.

But significant contributions occur due to the particles in the blood. In particular, the red blood cells stretch and squeeze to get through the tin capilliaries. Blood also has visco-elastic properties. Whether these are important depends on what you are trying to model.

thankyou sir..

ami1991 April 10, 2013 12:50

Quote:

Originally Posted by wethiq (Post 419599)
Hi, the blood is non-Newtianon fluid i.e., the viscousity is function of rate strain therefore in Fluent select define > material and select nontainon fluid and selct model such as power_law and input constant.

thank you sir


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