The Influence of Volume Surface Ratio of Rectangle Air-Conditioning Duct on Particle Deposition

Abstract:

This paper discusses particle deposition in rectangle air-conditioning duct using RSM (Reynold Stress Model) and random trajectory particle model. Particle with nominal diameters of 10-200μm are simulated at each of three nominal air speed: 4m/s, 6m/s and 8m/s, respectively, in the cross-section sizes of 160×120, 500×250, 1000×320mm. In simulation, the paper compares and analyzes the influence factors of particles deposition in volume surface ratio of the given duct. The results show that: 1) particle deposition velocity increases with volume surface ratio; 2) As the inlet air speed increasing, when the particles deposited to floor and vertical wall, the image of dimensionless deposition velocity Vs dimensionless relaxation time shows a coincident trend when the duct cross-section sizes are 500×250, 1000×320mm, but has great differences with the image of 160×120mm.

• Periodical: Applied Mechanics and Materials (Volumes 71-78)
• Pages: 3633-3638
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.71-78.3633
• Online since: July 2011
• Authors: Jie Zhang, Ze Hua Liu, Yuan Quan Liu, Hui Min Li, Yong Fei Ning
• Keywords: Deposition, Numerical Simulation, Particle, Volume Surface Ratio of Duct

References

[1] Mark R. Sippola and William W. Nazaroff: Lawrence Berkeley National Laboratory Report LBNL–51432 (2002).

[2] Mark R. Sippola and William W. Nazaroff: Aerosol Science and Technology Vol. 38(2004), p.914–925.

[3] Mark R. Sippola and William W. Nazaroff: Aerosol Science and Technology Vol. 39(2005), p.139–150.

[4] Reeks, M. W. and Skyrme, G.: Journal of Aerosol Science Vol. 7(1976), pp.485-495.

[5] McLaughlin, J.B.: Physics of Fluids A Vol. 1(1989), pp.1211-1224.

[6] Zhang, H. and Ahmadi, G.: Journal of Fluid Mechanics Vol. 406(2000), pp.55-80.

[7] Jun Wu and Bin Zhao: Heating Ventilating & Air Conditioning Vol. 4(2008), pp.18-23, in Chinese.

[8] Bradshaw P: Ann Rev Fluid Mech Vol. 1(1987), pp.53-74.

[9] Jinping Zhang and Angui Li: Heating Ventilating & Air Conditioning Vol. 6(2006), pp.10-17, in Chinese.

[10] Liu, B.Y.H. and Agarwal, J. K: Aerosol Science Vol. 5(1974), pp.145-155.