Fractal Dimension of Combustion Generated Particles

Abstract

Fractal dimension (D_f) is a parameter to determine geometric structure of the objects. Fractal dimension has been applied to characterize the agglomerates generated by Brownian coagulation in the gas-to-particle conversion process such as combustion. In this review, basic principle of fractal dimension is firstly introduced. Then, various methods for analyzing fractal dimension of agglomerates are explained. Image analyzing is a powerful tool to directly estimate fractal dimension of loose agglomerates (D_f < 2). Aerosol techniques such as electrical mobility analysis has been also applied to measure the fractal structures of agglomerates in the gas phase.