Identification of separable sources for advection-diffusion equations with variable diffusion coefficient from boundary measured data

Abstract

This paper considers the inverse problems of identifying either the unknown space-dependent heat source F(x) or the unknown timedependent heat source H(t) of the variable coefficient advection– diffusion equation with separable sources of the form F(x)H(t) from supplementary time-dependent temperature measurement at the right boundary of the domain. We proved that solutions of both inverse source problems can be identified uniquely under some regularity assumptions. Two non-iterative inversion algorithms were developed and numerically implemented for the identification of the unknown space-wise and time-wise dependent sources. The robustness and limitations of the two algorithms are investigated through numerical examples related to the reconstruction of continuous and discontinuous sources.