Numerical investigation of flow past 17-cylinder array of square cylinders
In this work, flow past 17-cylinder array is simulated using the two-dimensional lattice Boltzmann method. Effect of gap spacings (0.5 ≤ gx* ≤ 3, 0.5 ≤ gy* ≤ 3) and Reynolds number (Re = 75 - 150) is analyzed in details. Results are presented in the form of vorticity contours plots, time-histories o...
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AIP Publishing LLC
2018-06-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.5022360 |
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doaj-art-5d1b09266ce244a58e51cbb27f5889432018-09-02T21:39:11ZengAIP Publishing LLCAIP Advances2158-32262018-06-0186065004065004-2210.1063/1.5022360122805ADVNumerical investigation of flow past 17-cylinder array of square cylindersShams-ul-Islam0Ghazala Nazeer1Zhou Chao Ying2COMSATS Institute of Information Technology, Mathematics Department, Islamabad 44000, PakistanCOMSATS Institute of Information Technology, Mathematics Department, Islamabad 44000, PakistanHarbin Institute of Technology, Shenzhen Graduate School, Xili Town, Shenzhen 518055, ChinaIn this work, flow past 17-cylinder array is simulated using the two-dimensional lattice Boltzmann method. Effect of gap spacings (0.5 ≤ gx* ≤ 3, 0.5 ≤ gy* ≤ 3) and Reynolds number (Re = 75 - 150) is analyzed in details. Results are presented in the form of vorticity contours plots, time-histories of drag and lift coefficients and power spectrum of lift coefficient. Six distinct flow regimes are identified for different gap spacings and Reynolds numbers: steady flow regime, single bluff body flow regime, non-fully developed flow regime, chaotic flow regime, quasi-periodic-I flow regime and quasi-periodic-II flow regime. Chaotic flow regime is the mostly observed flow regime while the single bluff body flow regime rarely occurs for this configuration. It is observed that drag force along each cylinder in 17-cylinder array decreases in the streamwise direction for fixed Reynold number and gap spacing. C1 and C2 cylinders experience the maximum drag at small gap spacing and Reynolds number. Also the Reynolds number is found to be more effective on flow characteristics as compared to gap spacings.http://dx.doi.org/10.1063/1.5022360 |
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English |
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Article |
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Shams-ul-Islam Ghazala Nazeer Zhou Chao Ying |
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Shams-ul-Islam Ghazala Nazeer Zhou Chao Ying Numerical investigation of flow past 17-cylinder array of square cylinders AIP Advances |
| author_facet |
Shams-ul-Islam Ghazala Nazeer Zhou Chao Ying |
| author_sort |
Shams-ul-Islam |
| title |
Numerical investigation of flow past 17-cylinder array of square cylinders |
| title_short |
Numerical investigation of flow past 17-cylinder array of square cylinders |
| title_full |
Numerical investigation of flow past 17-cylinder array of square cylinders |
| title_fullStr |
Numerical investigation of flow past 17-cylinder array of square cylinders |
| title_full_unstemmed |
Numerical investigation of flow past 17-cylinder array of square cylinders |
| title_sort |
numerical investigation of flow past 17-cylinder array of square cylinders |
| publisher |
AIP Publishing LLC |
| series |
AIP Advances |
| issn |
2158-3226 |
| publishDate |
2018-06-01 |
| description |
In this work, flow past 17-cylinder array is simulated using the two-dimensional lattice Boltzmann method. Effect of gap spacings (0.5 ≤ gx* ≤ 3, 0.5 ≤ gy* ≤ 3) and Reynolds number (Re = 75 - 150) is analyzed in details. Results are presented in the form of vorticity contours plots, time-histories of drag and lift coefficients and power spectrum of lift coefficient. Six distinct flow regimes are identified for different gap spacings and Reynolds numbers: steady flow regime, single bluff body flow regime, non-fully developed flow regime, chaotic flow regime, quasi-periodic-I flow regime and quasi-periodic-II flow regime. Chaotic flow regime is the mostly observed flow regime while the single bluff body flow regime rarely occurs for this configuration. It is observed that drag force along each cylinder in 17-cylinder array decreases in the streamwise direction for fixed Reynold number and gap spacing. C1 and C2 cylinders experience the maximum drag at small gap spacing and Reynolds number. Also the Reynolds number is found to be more effective on flow characteristics as compared to gap spacings. |
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http://dx.doi.org/10.1063/1.5022360 |
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1612624422093455360 |