Effect of heat-source geometry on distribution and deposition of particulates in a ventilated chamber--颗粒学报PARTICUOLOGY

Chen, X. (2018). Effect of heat-source geometry on distribution and deposition of particulates in a ventilated chamber. Particuology, 36, 174-184. https://doi.org/10.1016/j.partic.2017.03.004

Effect of heat-source geometry on distribution and deposition of particulates in a ventilated chamber

Xi Chen^{a b *}

a School of Civil Engineering and Architecture, Henan University of Technology, Zhengzhou 450001, Henan, China
b Key Laboratory of Heating and Air Conditioning, The Education Department of Henan Province, Zhengzhou 450007, Henan, China

10.1016/j.partic.2017.03.004

Volume 36, February 2018, Pages 174-184

Received 4 August 2016, Revised 11 March 2017, Accepted 16 March 2017, Available online 23 June 2017, Version of Record 22 December 2017.

E-mail: chenxi2014013@haut.edu.cn

Highlights

• The particulate motion in a ventilated chamber with different heat sources was discussed.

• CFD was used to study the particle distribution and deposition.

• Thermophores is affected particle deposition heavily in indoor environments.

• Shape of near-wall heat sources had a great impact on the particle motion and deposition.

Abstract

To investigate the effect of near-wall heat-source shape on particulate motion, the particulate distribution and deposition in a ventilated chamber with different heat-source configurations were numerically modeled. Using the discrete random walk model of the Lagrangian method, the trajectories of 3200 mono-disperse particulates ranging from 1 to 10 μm with a density of 1400 kg/m3 were tracked. Airflow pattern, temperature fields, the distribution of particulate concentrations, and deposition patterns are calculated and presented. The results show that the shape of a near-wall heat source has an influence on the airflow as well as the temperature field in the chamber and hence affects the particulate distribution and deposition.

Graphical abstract

Keywords

Particle deposition; Particle distribution; Near-wall heat source; Computational fluid dynamics; Lagrangian method

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