Modeling of optical properties for a polydispersion/gas mixture

Adequate modeling of thermal radiation is an essential tool for the design of real-live combustion systems. Predictive methods for solving the radiati ve heat transfer equation require the values of absorption and scattering c oefficients of the participating media, In the present paper, a compromise between accuracy and computational economy is ensured in the evaluation of those coefficients, by using the exponential wide band model for the gaseou s components of the mixture, a new curve fitting approach to the Mie theory for intermediate and large particles and power series to represent the Mie coefficients for small particles. Predicted results with those approaches are presented herein to demonstrate the proposed models' high accuracy and relatively low computational costs. (C) 1999 Elsevier Science Ltd. All righ ts reserved.