Calculating A Parameter Over Time in Results

Hi all,

I'm simulating a burning tissue using "Heat Transfer in Porous Media" module and solving problem in time dependent but having some hard time on calculating a parameter. I would like to calculate** cumulative equivalent minutes at 43°C** as a contour, which is described as CEM43 = t_i*R^(43-T_i), where R(T_i< 43 °C)=1/4, R(T_i>43 °C)=1/2, T is the temperature and t is the time of exposure and I would like to calculate volume reached *CEM* value of *50, 100 and 150* at the end of the simulation. Any answer is greatly appreciated.

Best,

Alican