## THERMAL SCIENCE

International Scientific Journal

### SIMULTANEOUS RECONSTRUCTION OF TEMPERATURE FIELD AND RADIATIVE PROPERTIES BY INVERSE RADIATION ANALYSIS USING STOCHASTIC PARTICLE SWARM OPTIMIZATION

**ABSTRACT**

Simultaneous reconstruction of temperature field and radiative properties including scattering albedo and extinction coefficient is presented in a two-dimensional (2-D) rectangular, absorbing, emitting and isotropically scattering gray medium from the knowledge of the exit radiative intensities received by charge-coupled device (CCD) cameras at boundary surfaces. The inverse problem is formulated as a non-linear optimization problem and solved by stochastic particle swarm optimization. The effects of particle swarm size, generation number, measurement errors, and optical thickness on the accuracy of the estimation, and computing time were investigated and the results show that the temperature field and radiative properties can be reconstructed well for the exact and noisy data, but radiative properties are harder to obtain than temperature field. Moreover, the extinction coefficient is more difficult to reconstruct than scattering albedo.

**KEYWORDS**

PAPER SUBMITTED: 2013-06-21

PAPER REVISED: 2014-03-09

PAPER ACCEPTED: 2014-04-01

PUBLISHED ONLINE: 2014-05-04

**THERMAL SCIENCE** YEAR

**2016**, VOLUME

**20**, ISSUE

**Issue 2**, PAGES [493 - 504]

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