DYNAMIC SHAPE FACTOR OF A PLATE-LIKE PARTICLE

被引：39

作者：

CHENG, YS

YEH, HC

ALLEN, MD

机构：

[1] Lovelace Biomedical &, Environmental Research Inst,, Albuquerque, NM, USA, Lovelace Biomedical & Environmental Research Inst, Albuquerque, NM, USA

来源：

AEROSOL SCIENCE AND TECHNOLOGY | 1988年 / 8卷 / 02期

关键词：

AERODYNAMIC PROPERTIES - PARTICULATE MATERIALS - SHAPE FACTOR;

D O I：

10.1080/02786828808959176

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Talc aerosol particles found in work environments have plate-like shapes. These particles are difficult to characterize by their physical dimensions or their aerodynamic behavior. This paper describes a detailed study of the physical and aerodynamic properties of a commercial-grade, respirable talc aerosol and establishes a relationship between the projected area diameter and the aerodynamic resistance diameter. The measured bulk density was 3. 04 g/cm**3. Electron micrographs showed that the particles were plate-like with a fairl constant thickness-to-diameter ratio of 0. 096. The aerosol was aerodynamically separated in an aerosol centrifuge, and was collected flat on the substrate. The dynamic shape factor of the size-classified talc particle was calculated to be 1. 88, which is in good agreement with the theory based on an oblate spheroid moving with its short axis parallel to the flow.

引用

页码：109 / 123

页数：15