[kish]

Dear friends
I am doing blood flow analysis in the artery under feverish condition. I am using Non Newtonian fluid.

I have many doubts. The expert in this field kindly provide some guidelines to proceed my assignments.

1. If the temperature increases in our body , the heart will do work more . Heart beat will increase and cardiac output will be more.Since I am going to use velocity in the inlet,is there any direct relation between heart beat and flow rate?
Note : I know Cardiac output = swept volume * Heart rate.
I don't know how to calculate the swept volume. ( Any other relation..?)

2. will the viscosity of blood decreases with increase in body temperature? (But in the non Newtonian blood model, no temperature term).

3. I setup heat transfer coefficient for the artery and blood etc. Kindly provide your valuable guidelines how to proceed.

Thank you

Regards
Kish

[Lance]

1. Well, only you know the boundary conditions. I suspect the swept volume (of the left ventricle?) is very patient specific.
2. Why not look in the literature for temperature-viscosity relations for blood?
3. Again, only you will know the boundary conditions for how to setup your simulation.

What are you trying to get out of your simulation?

[kmgraju]

Dear friends

can assume the flow rate if the heart beat increases.

[kish]

Originally Posted by Lance

1. Well, only you know the boundary conditions. I suspect the swept volume (of the left ventricle?) is very patient specific.
2. Why not look in the literature for temperature-viscosity relations for blood?
3. Again, only you will know the boundary conditions for how to setup your simulation.

What are you trying to get out of your simulation?

Dear all
Thank you for your quick response. We are trying to find out the shear stress with and without stenotic condition under body temperature.
I tried in the literature about temperature and viscosity relationship. But my question is ,will the non Newtonian fluid viscosity affect with temperature?.

If I set the body temperature 39C and without specifying viscosity and temperature relationship under domain settings, will I get the variation in the viscosity ? ( Provided correct all other boundary conditions).

As far as we know the blood viscosity will change with respect to temperature ( not getting the exact relationship yet.), please suggest any other parameters shall we consider for this problem.

Thank you

Regards

Kish

[Lance]

Originally Posted by kish

If I set the body temperature 39C and without specifying viscosity and temperature relationship under domain settings, will I get the variation in the viscosity ?

Well, if the viscosity is constant (or independent on temperature or shear rate or any other variable) why would it change?

On a side note, do you really think that the blood viscosity will change significantly if there's a 1-2 °C degree increase in body temperature?