A multidimensional inverse radiation problem of estimating the strength of a heat source in participating media. (English) Zbl 1014.80007

Park, H. M.; Yoo, D. H.

Int. J. Heat Mass Transfer 44, No. 15, 2949-2956 (2001).

Summary: We consider an inverse radiation problem of determining the time-varying strength of a heat source, which mimics flames in a furnace, from temperature measurements in three-dimensional participating media where radiation and conduction occur simultaneously. The inverse radiation problem is posed as a minimization problem of the least-squares criterion, which is solved by a conjugate gradient method employing the adjoint equation to determine the descent direction. The discrete ordinate \(S_4\) method [M. F. Modest, Radiative heat transfer, McGraw-Hill, New York (1993)] is employed to solve the radiative transfer equation and its adjoint equation accurately. The performance of the present technique of inverse analysis is evaluated by several numerical experiments, and it is found to solve the inverse radiation problem accurately without a priori information about the unknown function to be estimated.

MSC:

80A23	Inverse problems in thermodynamics and heat transfer
80M25	Other numerical methods (thermodynamics) (MSC2010)
85A25	Radiative transfer in astronomy and astrophysics

Keywords:

inverse radiation problem; time-varying strength of a heat source