changes.mady.by.user Arthur Aslanyan (Nafta College)
Saved on Feb 10, 2019
...
\frac{\partial p_1}{\partial t_D} = \frac{\partial^2 p_1}{\partial r_D^2} + \frac{1}{r_D}\cdot \frac{\partial p_1}{\partial r_D}
p_1(t_D = 0, r_D)= 0
p_1(t_D, r_D=1) = 1
\frac{\partial p_1(t_D, r_D)}{\partial r_D} \Bigg|_{r_D=r_{aD}} = 0
or
p_1(t_D, r_D = \infty) = 0
