Resolution of a three-dimensional unsteady inverse problem by sequential method using parameter reduction and infrared thermography measurements

A three-dimensional unsteady inverse model has been developed to compute he at fluxes and surface temperature in various configurations. Temperature me asurements are taken on one face of a thin plate using infrared thermograph y. The number of unknown parameters is reduced using a discrete cosine tran sform (DCT) analysis and by canceling values lower than a prescribed level. The efficiency of the method is proved through numerical simulations. A la boratory experiment also has been performed to estimate a flux imposed by a flame.