Effect of Different Near-Wall Treatments on Indoor Airflow Simulations
Airflow simulation results depend on a good prediction of near wall turbulence. In this paper a comparative study between different near wall treatments is presented. It is applied to two test cases in building: (1) the first concerns flow through a long corridor which is similar to that in a fully...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Isfahan University of Technology
2012-01-01
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| Series: | Journal of Applied Fluid Mechanics |
| Subjects: | |
| Online Access: | http://jafmonline.net/JournalArchive/download?file_ID=26911&issue_ID=210 |
| _version_ | 1811297604857757696 |
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| author | N.El Gharbi Rafik ABSI A Benzaoui |
| author_facet | N.El Gharbi Rafik ABSI A Benzaoui |
| author_sort | N.El Gharbi |
| collection | DOAJ |
| description | Airflow simulation results depend on a good prediction of near wall turbulence. In this paper a comparative study between different near wall treatments is presented. It is applied to two test cases in building: (1) the first concerns flow through a long corridor which is similar to that in a fully developed plane channel. Simulation results are compared to direct numerical simulation (DNS) data of Moser et al. (1999) for Reτ = 590 (where Reτ denotes the friction Reynolds number defined by friction velocity uτ , kinematics viscosity ν and the channel half-width δ); (2) the second case is a benchmark test for room air distribution. Simulation results are compared to experimental data obtained with laser-Doppler anemometry (Nielsen, 1990). Simulations were performed with the aid of CFD code Fluent (2005). Near wall treatments available in Fluent were tested: Standard Wall Functions, Non Equilibrium Wall Function and Enhanced Wall Treatment. In each case, suitable meshes with adequate position of the first near-wall node are needed. Results of near-wall mean stream wise velocity u+ and turbulent kinetic energy k+ profiles are presented, variables with the superscript of + are those non dimensional by the wall friction velocity uτ and the kinematic viscosity ν. |
| first_indexed | 2024-04-13T06:06:51Z |
| format | Article |
| id | doaj.art-450b9b8456624ecdaf7ca7db9c748aa8 |
| institution | Directory Open Access Journal |
| issn | 1735-3645 |
| language | English |
| last_indexed | 2024-04-13T06:06:51Z |
| publishDate | 2012-01-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Journal of Applied Fluid Mechanics |
| spelling | doaj.art-450b9b8456624ecdaf7ca7db9c748aa82022-12-22T02:59:13ZengIsfahan University of TechnologyJournal of Applied Fluid Mechanics1735-36452012-01-01546370.Effect of Different Near-Wall Treatments on Indoor Airflow SimulationsN.El GharbiRafik ABSI0A BenzaouiEBI, 32 boulevard du Port, 95094 Cergy-Pontoise cedex FranceAirflow simulation results depend on a good prediction of near wall turbulence. In this paper a comparative study between different near wall treatments is presented. It is applied to two test cases in building: (1) the first concerns flow through a long corridor which is similar to that in a fully developed plane channel. Simulation results are compared to direct numerical simulation (DNS) data of Moser et al. (1999) for Reτ = 590 (where Reτ denotes the friction Reynolds number defined by friction velocity uτ , kinematics viscosity ν and the channel half-width δ); (2) the second case is a benchmark test for room air distribution. Simulation results are compared to experimental data obtained with laser-Doppler anemometry (Nielsen, 1990). Simulations were performed with the aid of CFD code Fluent (2005). Near wall treatments available in Fluent were tested: Standard Wall Functions, Non Equilibrium Wall Function and Enhanced Wall Treatment. In each case, suitable meshes with adequate position of the first near-wall node are needed. Results of near-wall mean stream wise velocity u+ and turbulent kinetic energy k+ profiles are presented, variables with the superscript of + are those non dimensional by the wall friction velocity uτ and the kinematic viscosity ν.http://jafmonline.net/JournalArchive/download?file_ID=26911&issue_ID=210CFD Airflow Turbulence Simulation Near-Wall treatment Channel Room |
| spellingShingle | N.El Gharbi Rafik ABSI A Benzaoui Effect of Different Near-Wall Treatments on Indoor Airflow Simulations Journal of Applied Fluid Mechanics CFD Airflow Turbulence Simulation Near-Wall treatment Channel Room |
| title | Effect of Different Near-Wall Treatments on Indoor Airflow Simulations |
| title_full | Effect of Different Near-Wall Treatments on Indoor Airflow Simulations |
| title_fullStr | Effect of Different Near-Wall Treatments on Indoor Airflow Simulations |
| title_full_unstemmed | Effect of Different Near-Wall Treatments on Indoor Airflow Simulations |
| title_short | Effect of Different Near-Wall Treatments on Indoor Airflow Simulations |
| title_sort | effect of different near wall treatments on indoor airflow simulations |
| topic | CFD Airflow Turbulence Simulation Near-Wall treatment Channel Room |
| url | http://jafmonline.net/JournalArchive/download?file_ID=26911&issue_ID=210 |
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