Numerical Simulation of Flow behind Vortex Generators
In this study, flow behind rectangular vane type vortex generators mounted on a flat plate, is numerically simulated using the immersed boundary (IB) method. In the present work, the direct forcing IB method is employed because of its simplicity and high efficiency. Vortex generators of two differen...
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Isfahan University of Technology
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doaj-1b6e0a4115b542bbaf3e688c324f0e0b2020-11-25T02:34:03ZengIsfahan University of Technology Journal of Applied Fluid Mechanics1735-35722019-01-0112410471061.Numerical Simulation of Flow behind Vortex GeneratorsN. K. Singh0Department of Mechanical Engineering, National Institute of Technology, Kurukshetra, Haryana, 136119, IndiaIn this study, flow behind rectangular vane type vortex generators mounted on a flat plate, is numerically simulated using the immersed boundary (IB) method. In the present work, the direct forcing IB method is employed because of its simplicity and high efficiency. Vortex generators of two different heights are numerically investigated. The height of vanes in the first case is close to the definition of submerged/low-profile vortex generators while the other case is closer to the definition of a conventional vortex generator. The resultant highly three-dimensional flow and its transition to turbulence have been studied. Counter-rotating vortices generated by these passive rectangular vortex generators are characterized. Streamwise evolution of non-dimensionalised maximum values of vorticity, vortex strength, streamwise velocity and wall-normal velocity are studied. The simulations show that the IB method in conjunction with DNS effectively simulates the time-dependent flow behind an array of passive vortex generators placed in an initially laminar boundary layer.http://jafmonline.net/JournalArchive/download?file_ID=49235&issue_ID=1001Rectangular vortex generators; Direct numerical simulation; Immersed boundary method. |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
N. K. Singh |
spellingShingle |
N. K. Singh Numerical Simulation of Flow behind Vortex Generators Journal of Applied Fluid Mechanics Rectangular vortex generators; Direct numerical simulation; Immersed boundary method. |
author_facet |
N. K. Singh |
author_sort |
N. K. Singh |
title |
Numerical Simulation of Flow behind Vortex Generators |
title_short |
Numerical Simulation of Flow behind Vortex Generators |
title_full |
Numerical Simulation of Flow behind Vortex Generators |
title_fullStr |
Numerical Simulation of Flow behind Vortex Generators |
title_full_unstemmed |
Numerical Simulation of Flow behind Vortex Generators |
title_sort |
numerical simulation of flow behind vortex generators |
publisher |
Isfahan University of Technology |
series |
Journal of Applied Fluid Mechanics |
issn |
1735-3572 |
publishDate |
2019-01-01 |
description |
In this study, flow behind rectangular vane type vortex generators mounted on a flat plate, is numerically simulated using the immersed boundary (IB) method. In the present work, the direct forcing IB method is employed because of its simplicity and high efficiency. Vortex generators of two different heights are numerically investigated. The height of vanes in the first case is close to the definition of submerged/low-profile vortex generators while the other case is closer to the definition of a conventional vortex generator. The resultant highly three-dimensional flow and its transition to turbulence have been studied. Counter-rotating vortices generated by these passive rectangular vortex generators are characterized. Streamwise evolution of non-dimensionalised maximum values of vorticity, vortex strength, streamwise velocity and wall-normal velocity are studied. The simulations show that the IB method in conjunction with DNS effectively simulates the time-dependent flow behind an array of passive vortex generators placed in an initially laminar boundary layer. |
topic |
Rectangular vortex generators; Direct numerical simulation; Immersed boundary method. |
url |
http://jafmonline.net/JournalArchive/download?file_ID=49235&issue_ID=1001 |
work_keys_str_mv |
AT nksingh numericalsimulationofflowbehindvortexgenerators |
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1724810545632116736 |