Question

a) Two instantaneous sources, each of strength M are symmetrically placed about the origin (x=0) at locations\small \widehat{x} = \pm 1 respectively and released at time t=0. Obtain the solution to the 1d diffusion equation describing the concentration c(x,t) at a time > 0 for \small -\infty >x>\infty . Plot the concentration field, c(x,t)/M, as a function of x for -4 What does the plot looks like for Dt > 5. b) Find the peak concentration at x=0 and the time to at which it develops. Plot c(0,t) vs t for D = 10(-11)cm2/s ;M = 25 \small \mu g/cm2 and \small \widehat{x} = \pm 1 \mu m

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