jailcd2019-070: Numerical Simulation of Pollutant Dispersion in Buildings Based on FLUENT

Abstract

FLUENT  uses  different  discrete  formats  and  numerical  methods  for  various  complex  flow  physical  phenomena to efficiently solve the calculation of complex flow problems in various fields. In this paper,  FLUENT numerical simulation is used to solve the numerical simulation of the diffusion of indoor pollution  sources in buildings, and the indoor ventilation design scheme is developed according to the optimal solution, which provides a theoretical basis for the rationalization of architectural design. The pre-processing in the  simulation process uses GAMBIT to establish a calculation model, and uses FLUENT to establish a pollution  source  component  transmission  calculation  model,  and  set  boundary  conditions,  and  finally  solve  and  post-process. This paper simulates and controls the working environment of the building to a temperature of 300K and atmospheric pressure of 101,325Pa. By changing the fan pressure of the building to observe the  distribution of formaldehyde in the room, the optimal solution is obtained. The wind pressure is controlled by  the least squares method. When the wind pressure is 23 Pa, the pollutants do not reflow completely indoors, which is the optimal value of the wind pressure of the fan.