changes.mady.by.user Arthur Aslanyan (Nafta College)
Saved on Feb 22, 2019
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\frac{\partial p}{\partial t} = \chi \, \laplace pleft( \frac{\partial^2 p}{\partial r^2} + \frac{1}{r} \frac{\partial p}{\partial r} \right)
p(t = 0, {\bf r}) = p_i
p(t, r \rightarrow \infty ) = p_i
\frac{\partial p(t, r )}{\partial r} \bigg|_{r \rightarrow 0} = \frac{q_t}{\sigma \, d}
