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average tumor temperature for 3D simulation
Posted Oct 14, 2011, 6:07 a.m. EDT Heat Transfer & Phase Change 2 Replies
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Hi,
I am modelling a 2D axisymmetric model (heat conduction, transient) with a tumor embedded in a tissue in comsol 3.5a.
For finding the average tumor temperature i used the formula average tumor temperature = 2*pi*r*T/(4/3*pi*0.005^3) in integrating coupling variables->subdomain variables section by selecting the tumor domain.
After running the program I go to global variables plot and plot average tumor temperature vs time, I get the desired result.
But when I do a 3D simulation using the same formula for calculating average tumor temperature and repeat the same steps i get an error message saying not a valid expression.
I know that the mistake is in the formula I am using bot not sure how to calculate the average tumor temperature in 3D simulation.
Can you somebody please help me out with this.
I have attached the picture of my 3D module.
Any help would be much appreciated.
Thank You
Best Regards
Ravi
I am modelling a 2D axisymmetric model (heat conduction, transient) with a tumor embedded in a tissue in comsol 3.5a.
For finding the average tumor temperature i used the formula average tumor temperature = 2*pi*r*T/(4/3*pi*0.005^3) in integrating coupling variables->subdomain variables section by selecting the tumor domain.
After running the program I go to global variables plot and plot average tumor temperature vs time, I get the desired result.
But when I do a 3D simulation using the same formula for calculating average tumor temperature and repeat the same steps i get an error message saying not a valid expression.
I know that the mistake is in the formula I am using bot not sure how to calculate the average tumor temperature in 3D simulation.
Can you somebody please help me out with this.
I have attached the picture of my 3D module.
Any help would be much appreciated.
Thank You
Best Regards
Ravi
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2 Replies Last Post Nov 21, 2011, 5:20 a.m. EST
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Posted:
1 decade ago
The formula you specified is for axisymmetric volume integration. In 3D you should remove the 2*pi*r term. The reason you get an error is that “r” is not defined in a 3D analysis.
Nagi Elabbasi
Veryst Engineering
Nagi Elabbasi
Veryst Engineering
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Posted:
1 decade ago
Thanks for the reply, Nagi. I figured out that issue and the model is working fine now.