Analysis of Thermal Performances in a Ventilated Room Using LBM-MRT: Effect of a Porous Separation
This article demonstrates the feasibility of porous separation on the performance of displacement ventilation in a rectangular enclosure. A jet of fresh air enters the cavity through an opening at the bottom of the left wall and exits through an opening at the top of the right wall. The porous separ...
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| Format: | Article |
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MDPI AG
2022-01-01
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| Series: | Computation |
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| Online Access: | https://www.mdpi.com/2079-3197/10/1/4 |
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| author | Zouhira Hireche Nabil Himrane Lyes Nasseri Yasmine Hamrioui Djamel Eddine Ameziani |
| author_facet | Zouhira Hireche Nabil Himrane Lyes Nasseri Yasmine Hamrioui Djamel Eddine Ameziani |
| author_sort | Zouhira Hireche |
| collection | DOAJ |
| description | This article demonstrates the feasibility of porous separation on the performance of displacement ventilation in a rectangular enclosure. A jet of fresh air enters the cavity through an opening at the bottom of the left wall and exits through an opening at the top of the right wall. The porous separation is placed in the center of the cavity and its height varies between 0.2 and 0.8 with three values of thickness, 0.1, 0.2, and 0.3. The heat transfer rate was calculated for different intervals of Darcy (10<sup>−6</sup> ≤ Da ≤ 10), Rayleigh (10 ≤ Ra ≤ 10<sup>6</sup>), and Reynolds (50 ≤ Re ≤ 500) numbers. The momentum and the energy equations were solved by the lattice Boltzmann method with multiple relaxation times (LB-MRT). Schemes D2Q9 and D2Q5 were chosen for the velocity and temperature fields, respectively. For porous separation, the generalized Darcy–Brinkman–Forchheimer model was adopted. It is represented by a term added in the standard LB equations. For the dynamic domain, numerical simulations revealed complex flow structures depending on all control parameters. The results showed that the thermal field, mainly in the second compartment, is very dependent on the size and permeability of the porous separation. However, they have no influence on the transfer rate. |
| first_indexed | 2024-03-10T01:41:25Z |
| format | Article |
| id | doaj.art-7896a18a660b4f9ebb656bb19677e72f |
| institution | Directory Open Access Journal |
| issn | 2079-3197 |
| language | English |
| last_indexed | 2024-03-10T01:41:25Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Computation |
| spelling | doaj.art-7896a18a660b4f9ebb656bb19677e72f2023-11-23T13:23:14ZengMDPI AGComputation2079-31972022-01-01101410.3390/computation10010004Analysis of Thermal Performances in a Ventilated Room Using LBM-MRT: Effect of a Porous SeparationZouhira Hireche0Nabil Himrane1Lyes Nasseri2Yasmine Hamrioui3Djamel Eddine Ameziani4Laboratory of Multiphase Transport and Porous Media (LTPMP), Faculty of Mechanical and Proceeding Engineering, University of Sciences and Technology Houari Boumediene, Algiers 16111, AlgeriaLaboratory of Energy and Mechanical Engineering (LEMI), Faculty of Technology, University of M’Hamed Bougara Boumerdes, Boumerdes 35000, AlgeriaLaboratory of Multiphase Transport and Porous Media (LTPMP), Faculty of Mechanical and Proceeding Engineering, University of Sciences and Technology Houari Boumediene, Algiers 16111, AlgeriaLaboratory of Multiphase Transport and Porous Media (LTPMP), Faculty of Mechanical and Proceeding Engineering, University of Sciences and Technology Houari Boumediene, Algiers 16111, AlgeriaLaboratory of Multiphase Transport and Porous Media (LTPMP), Faculty of Mechanical and Proceeding Engineering, University of Sciences and Technology Houari Boumediene, Algiers 16111, AlgeriaThis article demonstrates the feasibility of porous separation on the performance of displacement ventilation in a rectangular enclosure. A jet of fresh air enters the cavity through an opening at the bottom of the left wall and exits through an opening at the top of the right wall. The porous separation is placed in the center of the cavity and its height varies between 0.2 and 0.8 with three values of thickness, 0.1, 0.2, and 0.3. The heat transfer rate was calculated for different intervals of Darcy (10<sup>−6</sup> ≤ Da ≤ 10), Rayleigh (10 ≤ Ra ≤ 10<sup>6</sup>), and Reynolds (50 ≤ Re ≤ 500) numbers. The momentum and the energy equations were solved by the lattice Boltzmann method with multiple relaxation times (LB-MRT). Schemes D2Q9 and D2Q5 were chosen for the velocity and temperature fields, respectively. For porous separation, the generalized Darcy–Brinkman–Forchheimer model was adopted. It is represented by a term added in the standard LB equations. For the dynamic domain, numerical simulations revealed complex flow structures depending on all control parameters. The results showed that the thermal field, mainly in the second compartment, is very dependent on the size and permeability of the porous separation. However, they have no influence on the transfer rate.https://www.mdpi.com/2079-3197/10/1/4mixed convectionventilated cavitydisplacement ventilationporous separation |
| spellingShingle | Zouhira Hireche Nabil Himrane Lyes Nasseri Yasmine Hamrioui Djamel Eddine Ameziani Analysis of Thermal Performances in a Ventilated Room Using LBM-MRT: Effect of a Porous Separation Computation mixed convection ventilated cavity displacement ventilation porous separation |
| title | Analysis of Thermal Performances in a Ventilated Room Using LBM-MRT: Effect of a Porous Separation |
| title_full | Analysis of Thermal Performances in a Ventilated Room Using LBM-MRT: Effect of a Porous Separation |
| title_fullStr | Analysis of Thermal Performances in a Ventilated Room Using LBM-MRT: Effect of a Porous Separation |
| title_full_unstemmed | Analysis of Thermal Performances in a Ventilated Room Using LBM-MRT: Effect of a Porous Separation |
| title_short | Analysis of Thermal Performances in a Ventilated Room Using LBM-MRT: Effect of a Porous Separation |
| title_sort | analysis of thermal performances in a ventilated room using lbm mrt effect of a porous separation |
| topic | mixed convection ventilated cavity displacement ventilation porous separation |
| url | https://www.mdpi.com/2079-3197/10/1/4 |
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