Study of Indoor Ventilation Based on Large-Scale DNS by a Domain Decomposition Method

被引：4
作者：
Jiang, Junyang [1 ]
Jiang, Zichao [1 ]
Kwan, Trevor Hocksun [2 ]
Liu, Chun-Ho [3 ]
Yao, Qinghe [1 ]
机构：
[1] Sun Yat Sen Univ, Sch Aeronaut & Astronaut, Guangzhou 510275, Guangdong, Peoples R China
[2] Univ Sci & Technol China, Dept Thermal Sci & Energy Engn, Hefei 230027, Anhui, Peoples R China
[3] Univ Hong Kong, Dept Mech Engn, Hong Kong 999077, Peoples R China
来源：
SYMMETRY-BASEL | 2019年 / 11卷 / 11期
关键词：
indoor ventilation; turbulent flow; balancing domain decomposition method; large-scale numerical simulation; PARTICULATE MATTER TRANSPORT; LARGE-EDDY SIMULATION; AIR-FLOW; NUMERICAL-SIMULATION; NATURAL VENTILATION; COMPUTATIONS; ENVIRONMENT; PREDICTION; BUILDINGS; POLLUTION;
D O I：
10.3390/sym11111416
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
This paper presents a large-scale Domain Decomposition Method (DDM) based Direct Numerical Simulation (DNS) for predicting the behavior of indoor airflow, where the aim is to design a comfortable and efficient indoor air environment of modern buildings. An analogy of the single-phase convection problems is applied, and the pressure stabilized domain decomposition method is used to symmetrize the linear systems of Navier-Stokes equations and the convection-diffusion equation. Furthermore, a balancing preconditioned conjugate gradient method is utilized to deal with the interface problem caused by domain decomposition. The entire simulation model is validated by comparing the numerical results with that of recognized experimental and numerical data from previous literature. The transient behavior of indoor airflow and its complexity in the ventilated room are discussed; the velocity and vortex distribution of airflow are investigated, and its possible influence on particle accumulation is classified.
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页数：14
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