Journal of Theoretical
and Applied Mechanics

50, 4, pp. 1011-1023, Warsaw 2012

Application of the method of fundamental solutions with the Laplace transformation for the inverse transient heat source problem

Magdalena Mierzwiczak, Jan Adam Kołodziej
The paper deals with the inverse determination of heat source in an unsteady heat conduction problem. The governing equation for the unsteady Fourier heat conduction in 2D region with unknown internal heat source is known as the inverse boundary-initial-value problem. The identification of strength of the heat source is achieved by using the boundary condition, initial condition and a known value of temperature in chosen points placed inside the domain. For the solution of the inverse problem of determination of the heat source, the Laplace transformation with the method of fundamental solution and radial basis functions is proposed. Due to ill conditioning of the inverse transient heat conduction problem, the Tikhonov regularization method based on SVD and L-curve criterion was used. As the test problems, the 2D inverse boundary-initial-value problems (2D_IBIVP) in region $ \Omega$ with known analytical solutions are considered.
Keywords: method of fundamental solutions; radial basis functions; inverse transient heat source problem