Study of Periodic Thermal Exchange in a Cavity Ventilated by Displacement

Hireche, Zouhira; Nasseri, Lyes; Ameziani, Djamel Eddine

doi:10.1007/s13369-020-04556-w

Cited by 4 publications

(2 citation statements)

References 35 publications

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“…In our work, we used the rebound boundary condition [45][46][47][48] to model the adhesion to all walls. We also used the boundary conditions for the imposed velocity type (Zu and He [42]) to model the imposed velocities and temperatures.…”

Section: Boundary Conditionmentioning

confidence: 99%

Analysis of Thermal Performances in a Ventilated Room Using LBM-MRT: Effect of a Porous Separation

et al. 2022

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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 (10−6 ≤ Da ≤ 10), Rayleigh (10 ≤ Ra ≤ 106), 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.

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Section: Boundary Conditionmentioning

confidence: 99%

Analysis of Thermal Performances in a Ventilated Room Using LBM-MRT: Effect of a Porous Separation

et al. 2022

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“…In the MRT-LBM model, boundary conditions are needed for both velocity and temperature. The boundary conditions are treated as [24][25][26]. For the Dirichlet type case, the so-called "Bounce back" case is used to model a solid stationary or conditions at the moving and non-slip borders [27][28][29].…”

Section: Thermal Boundary Conditionsmentioning

confidence: 99%

LBM-MRT simulation of vertical flow of a non-Newtonian fluid in a channel provided with obstacles

et al. 2021

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Forced convection heat transfer in channels with a block has been studied numerically. The vertical walls are differentially heated. The Lattice Boltzmann Method with multiple relaxation time (MRT) has been used to solve numerically the momentum and the heat transfer governing equations. This study details the effects of variations in the Reynolds number, Rayleigh number, and behavior index of fluid, to illustrate important fundamental and practical results. The results show that the recirculation caused by porous-covering block will significantly enhance the heat transfer rate on both top and right faces of second and subsequent blocks. In order to better understand the different elements of the study, we first analyzed the flow in a channel without obstacles in order to understand the behavior of non-Newtonian fluids. in such situations, we have observed that the speed profiles at establishment are essentially dependent on the behavior index, while the heat transfers are proportional to the Reynolds and Prandtl numbers but inversely to the behavior index.

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LBM-MRT study of a reactive porous separation on thermal and depollution efficiency in a ventilated room

Arab,

Himrane,

Ameziani

et al. 2024

International Communications in Heat and Mass Transfer

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Study of Periodic Thermal Exchange in a Cavity Ventilated by Displacement

Cited by 4 publications

References 35 publications

Analysis of Thermal Performances in a Ventilated Room Using LBM-MRT: Effect of a Porous Separation

Analysis of Thermal Performances in a Ventilated Room Using LBM-MRT: Effect of a Porous Separation

LBM-MRT simulation of vertical flow of a non-Newtonian fluid in a channel provided with obstacles

LBM-MRT study of a reactive porous separation on thermal and depollution efficiency in a ventilated room

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