AAAR 32nd Annual Conference
September 30 - October 4, 2013
Oregon Convention Center
Portland, Oregon, USA
Abstract View
A Computationally Efficient Multi-particle Sintering Model
VIVEK SHAH, Pratim Biswas, Washington University in St. Louis
Abstract Number: 296 Working Group: Aerosol Physics
Abstract In high temperature aerosol processes, sintering determines the physical characteristics, and hence the final application of the synthesized aggregate. A better estimate of the properties of the synthesized material can be obtained by simulating the final properties of sintered aggregate. Although there are various models for sintering of multiple particles, the models are either too simplistic such as Koch and Friedlander model (Koch and Friedlander 1990) or are computationally intensive such as molecular dynamics model.
In this work a multi-particle geometric sintering (MPGS) model is developed which is computationally efficient and hence can be used to simulate the sintering of large number of particles. The MPGS models extends neck radius based model (Cho and Biswas 2006; Xie 2008) whose application has been limited because of the lack of a suitable model for multiple particles. The MPGS model is compared to the Koch and Friedlander model for predicting the normalized surface area. The MPGS model is then applied to test cases of linear agglomerates and fractal agglomerates to study the effect of number of particles in the cluster. The surface area decrease has been shown to be dependent on the number particles in the agglomerate in contrast to Koch and Friedlander model. Finally the model is applied to a film of particles to study the effect of sintering on the morphology. A good estimate of the morphology of the film which consists of 10000 particles or more is easily obtained because of the computational simplicity of the model.
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Cho, K. and Biswas, P. (2006). J. Aerosol Sci 37:1378-1387.
Xie, H. (2008). J. Aerosol Sci 39:277-285.