Numerical Simulations Applied to Energy Efficiency for Buildings with Lattice Boltzmann Method

5 Pages Posted: 25 Apr 2019 Last revised: 31 May 2019

See all articles by Lyes Nasseri

Lyes Nasseri

University of Science and Technology Houari Boumedienne

Zouhira Hireche

University of Science and Technology Houari Boumedienne

Ali Cherif

University of Science and Technology Houari Boumedienne

Djamel Eddine Ameziani

University of Science and Technology Houari Boumedienne

Date Written: April 7, 2019

Abstract

Convective heat transfer coefficients are often arbitrarily fixed in building energy simulations. This study aims to determine the convective heat transfer coefficients on the floor, the walls and the ceiling of a room with underfloor heating. To conduct this study, natural convection induced by the temperature gradient between the bottom and upper walls within square enclosure has been studied. The upper wall is brought to a sinusoidal temperature to represent its daily change. Different Rayleigh number values are considered here. The study has been carried out by solving numerically momentum and energy equations with the Boussinesq approximation. The governing equations have been solved using the Lattice Boltzmann Method. The study has been carried out for Rayleigh numbers in the range 10 ≤ Ra ≤ 106, while Prandtl number and aspect ratio are kept constant at 0.71 and 1, respectively. The numerical results in the form of average Nusselt number and gain of the time-mean Nusselt number, are presented in this study.

Keywords: Rayleigh Benard Convection, Lattice Boltzmann Method, Periodic Cooling

Suggested Citation

Nasseri, Lyes and Hireche, Zouhira and Cherif, Ali and Ameziani, Djamel Eddine, Numerical Simulations Applied to Energy Efficiency for Buildings with Lattice Boltzmann Method (April 7, 2019). 2nd National Conference on Computational Fluid Dynamics & Technology 2018 (CFD & Tech 2018), Available at SSRN: https://ssrn.com/abstract=3377238 or http://dx.doi.org/10.2139/ssrn.3377238

Lyes Nasseri (Contact Author)

University of Science and Technology Houari Boumedienne ( email )

El Alia Bab Ezzouar
Algiers
Algeria

Zouhira Hireche

University of Science and Technology Houari Boumedienne ( email )

El Alia Bab Ezzouar
Algiers
Algeria

Ali Cherif

University of Science and Technology Houari Boumedienne ( email )

El Alia Bab Ezzouar
Algiers
Algeria

Djamel Eddine Ameziani

University of Science and Technology Houari Boumedienne ( email )

El Alia Bab Ezzouar
Algiers
Algeria

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