Simulation Of The Radiative Transfer By Integral Equation Method And Study On The Radiative Properties Of Aerosol Particles

With the abnormal climate change in recent years, a growing emphasis on the study of atmospheric aerosols has been put forward. Aerosols has major impacts of radiative forcing effects on the climate, also affect climate of surface boundary layer, as well as some interference and attenuation effects on military target detection. At present, countries all over the world have started the research of the features of aerosol radiation, of which the United States, Canada, France and Russia have made significant progress. In this paper, the integrated test platform of particle radiation features has been used to measure the spectral transmittance of pure SiO2. The complex refractive data has been obtained by the use of inversion model.Radiative transfer is an important aspect of Medium radiation research. The conventional methods of calculating radiative transferring, such as the regional method, finite volume method, Monte Carlo method etc., all of these can be classified as numerical approximation solution methods. Because of the numerical dispersion error and the physical simplification, the result can only be an approximate solution. The integral equation method(IE method), used in this paper, is used to solve the radiative transfer equation. This specific method which uses mathematical methods is without physical model simplification and solid angle discretization. This is a high-precision calculation way that is suitable to employ as a standard to judge the correctness of results carried out by other calculation methods.In this paper, we have acted the theoretical model of IE method which is on the theoretical basis of coordinate transformation method, and have written the corresponding computer program. Moreover, we have an analog computation on the medium radiative transfer of the two-dimensional and three-dimensional cylindrical. The calculation results were made a comparison with the results of document, and were succeed to verify the accuracy of self-programming. Finally, compare the calculation results of IE method with the dispersion coordinate method and Monte Carlo method by using example of boiler furnace. The results show that the IE method is more precise, and the curve is smooth. Moreover, any point in the space can be integrated, and especially to dealt with the aspect of anisotropic scattering. Finally, effects on the calculation results have been analyzed, including the grid number, Gaussian nodes.