Abstract
This study investigates the fine particle behavior in the laminar airflow past a triangular cylinder. To track particles in motion for the investigation, a visualization system integrated with an effective postprocessing method is developed. Then it is perhaps for the first time that several individual fine particles moving in the flow near the base corners of the cylinder are tracked both simultaneously and continuously. These particles are found to follow closely the airflow pathlines, except very near the corners where the microscopic Stokes number is high. It is also revealed that all the particle tracks vacillate discernibly due to the Brownian motion. Taking this into account, an improved numerical simulation is conducted based on CFD software package FLUENT, with which dithering tracks of the moving particles are reproduced. Copyright 2013 American Association for Aerosol Research
Published Version
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