RANS Modeling of Stably Stratified Turbulent Boundary Layer Flows in OpenFOAM®
Quantifying mixing processes relating to the transport of heat, momentum, and scalar quantities of stably stratified turbulent geophysical flows remains a substantial task. In a stably stratified flow, such as the stable atmospheric boundary layer (SABL), buoyancy forces have a significant impact on...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2015-01-01
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| Series: | E3S Web of Conferences |
| Online Access: | http://dx.doi.org/10.1051/e3sconf/20150504003 |
| _version_ | 1818919728382476288 |
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| author | Wilson Jordan M. Venayagamoorthy Subhas K. |
| author_facet | Wilson Jordan M. Venayagamoorthy Subhas K. |
| author_sort | Wilson Jordan M. |
| collection | DOAJ |
| description | Quantifying mixing processes relating to the transport of heat, momentum, and scalar quantities of stably stratified turbulent geophysical flows remains a substantial task. In a stably stratified flow, such as the stable atmospheric boundary layer (SABL), buoyancy forces have a significant impact on the flow characteristics. This study investigates constant and stability-dependent turbulent Prandtl number (Prt) formulations linking the turbulent viscosity (νt) and diffusivity (κt) for modeling applications of boundary layer flows. Numerical simulations of plane Couette flow and pressure-driven channel flow are performed using the Reynolds-averaged Navier-Stokes (RANS) framework with the standard k-ε turbulence model. Results are compared with DNS data to evaluate model efficacy for predicting mean velocity and density fields. In channel flow simulations, a Prandtl number formulation for wall-bounded flows is introduced to alleviate overmixing of the mean density field. This research reveals that appropriate specification of Prt can improve predictions of stably stratified turbulent boundary layer flows. |
| first_indexed | 2024-12-20T01:10:28Z |
| format | Article |
| id | doaj.art-7930a2e59e094a4985cf6709d4cca606 |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-12-20T01:10:28Z |
| publishDate | 2015-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-7930a2e59e094a4985cf6709d4cca6062022-12-21T19:58:42ZengEDP SciencesE3S Web of Conferences2267-12422015-01-0150400310.1051/e3sconf/20150504003e3sconf_sowe2014_04003RANS Modeling of Stably Stratified Turbulent Boundary Layer Flows in OpenFOAM®Wilson Jordan M.0Venayagamoorthy Subhas K.1Department of Civil and Environmental Engineering, Colorado State UniversityDepartment of Civil and Environmental Engineering, Colorado State UniversityQuantifying mixing processes relating to the transport of heat, momentum, and scalar quantities of stably stratified turbulent geophysical flows remains a substantial task. In a stably stratified flow, such as the stable atmospheric boundary layer (SABL), buoyancy forces have a significant impact on the flow characteristics. This study investigates constant and stability-dependent turbulent Prandtl number (Prt) formulations linking the turbulent viscosity (νt) and diffusivity (κt) for modeling applications of boundary layer flows. Numerical simulations of plane Couette flow and pressure-driven channel flow are performed using the Reynolds-averaged Navier-Stokes (RANS) framework with the standard k-ε turbulence model. Results are compared with DNS data to evaluate model efficacy for predicting mean velocity and density fields. In channel flow simulations, a Prandtl number formulation for wall-bounded flows is introduced to alleviate overmixing of the mean density field. This research reveals that appropriate specification of Prt can improve predictions of stably stratified turbulent boundary layer flows.http://dx.doi.org/10.1051/e3sconf/20150504003 |
| spellingShingle | Wilson Jordan M. Venayagamoorthy Subhas K. RANS Modeling of Stably Stratified Turbulent Boundary Layer Flows in OpenFOAM® E3S Web of Conferences |
| title | RANS Modeling of Stably Stratified Turbulent Boundary Layer Flows in OpenFOAM® |
| title_full | RANS Modeling of Stably Stratified Turbulent Boundary Layer Flows in OpenFOAM® |
| title_fullStr | RANS Modeling of Stably Stratified Turbulent Boundary Layer Flows in OpenFOAM® |
| title_full_unstemmed | RANS Modeling of Stably Stratified Turbulent Boundary Layer Flows in OpenFOAM® |
| title_short | RANS Modeling of Stably Stratified Turbulent Boundary Layer Flows in OpenFOAM® |
| title_sort | rans modeling of stably stratified turbulent boundary layer flows in openfoam r |
| url | http://dx.doi.org/10.1051/e3sconf/20150504003 |
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