Application of laser light scattering for determination of the border aerosol-air in a specialized physical laboratory setup

INERA Conference 2015: Light in Nanoscience and Nanotechnology

Damov, K.S.^1,2 ; Iliev, M.T.^2

South-West University Neofit Rilski, Blagoevgrad

2700, Bulgaria^1

Sofia University St. Kliment Ohridski, 5 James Bourchier Blvd., Sofia

1164, Bulgaria^2

关键词: Aerosol phase;    Application of laser;    Cylindrical chambers;    Laboratory set-up;    Laser light scattering;    Mass densities;    Measurement chamber;    Physical laboratory;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/682/1/012007/pdf
DOI  :  10.1088/1742-6596/682/1/012007

来源: IOP

【 摘 要 】

The current article examines the application of laser light scattering in a specialized laboratory setup. It is used for determination of the kinematic viscosity and mass density of Aerodispersed Systems formed in Limited Volume (High Concentration Aerosols) by the method of free flow out. The measurement chamber is first filled with the investigated aerosol. After a predetermined delay time the aerosol is allowed to flow out through a calibrated pipe with fixed size located few centimetres above the chamber's bottom. The lowering of the upper border aerosol-air is continuously scanned using a laser beam directed along the axis of the cylindrical chamber. The kinematic viscosity and mass density of the investigated aerosol phase are calculated by formulas obtained by the authors. The suggested application of laser light scattering led to higher accuracy of the determination the position of aerosol-air border, thence the certainty of this method. This improvement allowed the use of computer controlled optoelectronic setting. The use of laser light scattering significantly improves the method for determination of the kinematic viscosity and mass density of Aerodispersed Systems formed in Limited Volume.