Numerical Analysis of the Effects of Riblets on Drag Reduction of a Flat Plate
In recent years, marine transportation as well as land and air transportation has become in the centre of attention. There has been an attempt to reduce the drag exerted on vessels by various methods, such as rough surfaces and base bleed. Study of the high-speed seawater animals like sharks and dol...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Isfahan University of Technology
2018-01-01
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| Series: | Journal of Applied Fluid Mechanics |
| Subjects: | |
| Online Access: | http://jafmonline.net/JournalArchive/download?file_ID=45404&issue_ID=248 |
| _version_ | 1818065448943484928 |
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| author | A. Heidarian H. Ghassemi P. Liu |
| author_facet | A. Heidarian H. Ghassemi P. Liu |
| author_sort | A. Heidarian |
| collection | DOAJ |
| description | In recent years, marine transportation as well as land and air transportation has become in the centre of attention. There has been an attempt to reduce the drag exerted on vessels by various methods, such as rough surfaces and base bleed. Study of the high-speed seawater animals like sharks and dolphins has triggered the use of riblets on the hull of marine vessels. The use of riblet is easy among various methods of skin friction drag reduction. For this reason, there is an interest for construction and optimization of riblet as an efficient and economical way. In this research, the shark’s skin was modeled for the first time in ANSYS CFX using Computational Fluid Dynamics, through analyzing the effects of riblet on a submerged flat plate. Different types of riblet based on height and space between micro channels were studied, and then a comparison between a riblet-covered plate and a smooth plate in various velocities were performed. It was found that by selecting the most appropriate type of riblet, 11 % drag reduction can be attained. Then, by comparing different types of riblets, the best type for drag reduction was selected. Furthermore, the obtained results were compared with the available experimental data. |
| first_indexed | 2024-12-10T14:52:04Z |
| format | Article |
| id | doaj.art-0bf3760cc0434a6bb57c5c2d6b87945c |
| institution | Directory Open Access Journal |
| issn | 1735-3572 |
| language | English |
| last_indexed | 2024-12-10T14:52:04Z |
| publishDate | 2018-01-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Journal of Applied Fluid Mechanics |
| spelling | doaj.art-0bf3760cc0434a6bb57c5c2d6b87945c2022-12-22T01:44:25ZengIsfahan University of TechnologyJournal of Applied Fluid Mechanics1735-35722018-01-01113679688.Numerical Analysis of the Effects of Riblets on Drag Reduction of a Flat PlateA. Heidarian0H. Ghassemi1P. Liu2Department of Marine Engineering, Persian Gulf University, Bushehr, IranDepartment of Maritime Engineering, Amirkabir University of Technology, Tehran, Tehran, IranAustralian Maritime College, University of Tasmania, Locked bag 1395, Launeston, TAS 7250, AustraliaIn recent years, marine transportation as well as land and air transportation has become in the centre of attention. There has been an attempt to reduce the drag exerted on vessels by various methods, such as rough surfaces and base bleed. Study of the high-speed seawater animals like sharks and dolphins has triggered the use of riblets on the hull of marine vessels. The use of riblet is easy among various methods of skin friction drag reduction. For this reason, there is an interest for construction and optimization of riblet as an efficient and economical way. In this research, the shark’s skin was modeled for the first time in ANSYS CFX using Computational Fluid Dynamics, through analyzing the effects of riblet on a submerged flat plate. Different types of riblet based on height and space between micro channels were studied, and then a comparison between a riblet-covered plate and a smooth plate in various velocities were performed. It was found that by selecting the most appropriate type of riblet, 11 % drag reduction can be attained. Then, by comparing different types of riblets, the best type for drag reduction was selected. Furthermore, the obtained results were compared with the available experimental data.http://jafmonline.net/JournalArchive/download?file_ID=45404&issue_ID=248Drag reduction; Flat plate; Riblet; Micro channels. |
| spellingShingle | A. Heidarian H. Ghassemi P. Liu Numerical Analysis of the Effects of Riblets on Drag Reduction of a Flat Plate Journal of Applied Fluid Mechanics Drag reduction; Flat plate; Riblet; Micro channels. |
| title | Numerical Analysis of the Effects of Riblets on Drag Reduction of a Flat Plate |
| title_full | Numerical Analysis of the Effects of Riblets on Drag Reduction of a Flat Plate |
| title_fullStr | Numerical Analysis of the Effects of Riblets on Drag Reduction of a Flat Plate |
| title_full_unstemmed | Numerical Analysis of the Effects of Riblets on Drag Reduction of a Flat Plate |
| title_short | Numerical Analysis of the Effects of Riblets on Drag Reduction of a Flat Plate |
| title_sort | numerical analysis of the effects of riblets on drag reduction of a flat plate |
| topic | Drag reduction; Flat plate; Riblet; Micro channels. |
| url | http://jafmonline.net/JournalArchive/download?file_ID=45404&issue_ID=248 |
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