Lattice Boltzmann investigation of contaminant removal efficiency in a ventilated chamber
Yasmine Hamrioui1, Djamel Eddine Ameziani1, Zohira Hireche1, Lyes Nasseri1, Rachid Nebbali1, Yali Guo2
1Laboratory of Multiphase Transport and Porous Media (LTPMP), Faculty of Mechanical and Proceeding Engineering, University of Sciences and Technology Houari Boumediene, Algiers 16111, Algeria
2Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
https://doi.org/10.5004/ic202414
ABSTRACT
The objectives of many researchers in building ventilation are to analyze contaminant removal and ensure comfort in buildings. To achieve this, improving indoor air quality and thermal comfort is essential to prevent health problems and reduce energy consumption in these environments. In this perspective, our research aims to numerically evaluate the efficiency of the removal of pollutants in a room where the ventilation occurs through the bottom of an active wall while the exit is located at the upper part of the right wall. In the middle of the lower wall, the chamber is divided by a porous matrix with a dimensionless height of 0.6. The numerical simulations were done with Fortran code using the lattice Boltzmann method with multiple relaxation time (LB-MRT). The results demonstrate that for a dimensionless time value less than 50, the pollutant removal efficiency virtually reaches its maximum value and is twice as high for low Reynolds values than for high Reynolds values, regardless of Rayleigh and Darcy values.
Keywords: Air quality; Displacement efficiency; LB-MRT method; Porous separation; Ventilated cavity
Abstract
