Effects of finite-size neutrally buoyant particles on the turbulent channel flow at a Reynolds number of 395
Abstract A direct-forcing fictitious domain (DFFD) method is used to perform fully resolved numerical simulations of turbulent channel flows laden with large neutrally buoyant particles. The effects of the particles on the turbulence (including the mean velocity, the root mean square (RMS) of the ve...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Yu, Zhaosheng [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2019 |
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| Anmerkung: |
© Shanghai University and Springer-Verlag GmbH Germany, part of Springer Nature 2019 |
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| Übergeordnetes Werk: |
Enthalten in: Ying yong shu xue he li xue / English edition - Shanghai University, 1980, 40(2019), 2 vom: 23. Jan., Seite 293-304 |
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| Übergeordnetes Werk: |
volume:40 ; year:2019 ; number:2 ; day:23 ; month:01 ; pages:293-304 |
| Links: |
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| DOI / URN: |
10.1007/s10483-019-2426-8 |
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OLC2042878898 |
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| 520 | |a Abstract A direct-forcing fictitious domain (DFFD) method is used to perform fully resolved numerical simulations of turbulent channel flows laden with large neutrally buoyant particles. The effects of the particles on the turbulence (including the mean velocity, the root mean square (RMS) of the velocity fluctuation, the probability density function (PDF) of the velocity, and the vortex structures) at a friction Reynolds number of 395 are investigated. The results show that the drag-reduction effect caused by finite-size spherical particles at low particle volumes is negligibly small. The particle effects on the RMS velocities at Reτ = 395 are significantly smaller than those at Reτ = 180, despite qualitatively the same effects, i.e., the presence of particles decreases the maximum streamwise RMS velocity near the wall via weakening the large-scale streamwise vortices, and increases the transverse and spanwise RMS velocities in the vicinity of the wall by inducing smaller-scale vortices. The effects of the particles on the PDFs of the fluid fluctuating velocities normalized with the RMS velocities are small, regardless of the particle size, the particle volume fraction, and the Reynolds number. | ||
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| 700 | 1 | |a Wang, Yu |4 aut | |
| 700 | 1 | |a Shao, Xueming |4 aut | |
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10.1007/s10483-019-2426-8 doi (DE-627)OLC2042878898 (DE-He213)s10483-019-2426-8-p DE-627 ger DE-627 rakwb eng 510 VZ Yu, Zhaosheng verfasserin aut Effects of finite-size neutrally buoyant particles on the turbulent channel flow at a Reynolds number of 395 2019 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Shanghai University and Springer-Verlag GmbH Germany, part of Springer Nature 2019 Abstract A direct-forcing fictitious domain (DFFD) method is used to perform fully resolved numerical simulations of turbulent channel flows laden with large neutrally buoyant particles. The effects of the particles on the turbulence (including the mean velocity, the root mean square (RMS) of the velocity fluctuation, the probability density function (PDF) of the velocity, and the vortex structures) at a friction Reynolds number of 395 are investigated. The results show that the drag-reduction effect caused by finite-size spherical particles at low particle volumes is negligibly small. The particle effects on the RMS velocities at Reτ = 395 are significantly smaller than those at Reτ = 180, despite qualitatively the same effects, i.e., the presence of particles decreases the maximum streamwise RMS velocity near the wall via weakening the large-scale streamwise vortices, and increases the transverse and spanwise RMS velocities in the vicinity of the wall by inducing smaller-scale vortices. The effects of the particles on the PDFs of the fluid fluctuating velocities normalized with the RMS velocities are small, regardless of the particle size, the particle volume fraction, and the Reynolds number. Zhu, Chenlin aut Wang, Yu aut Shao, Xueming aut Enthalten in Ying yong shu xue he li xue / English edition Shanghai University, 1980 40(2019), 2 vom: 23. Jan., Seite 293-304 (DE-627)130523747 (DE-600)770632-7 (DE-576)016095987 0253-4827 nnns volume:40 year:2019 number:2 day:23 month:01 pages:293-304 https://doi.org/10.1007/s10483-019-2426-8 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-MAT SSG-OPC-MAT GBV_ILN_40 GBV_ILN_70 AR 40 2019 2 23 01 293-304 |
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10.1007/s10483-019-2426-8 doi (DE-627)OLC2042878898 (DE-He213)s10483-019-2426-8-p DE-627 ger DE-627 rakwb eng 510 VZ Yu, Zhaosheng verfasserin aut Effects of finite-size neutrally buoyant particles on the turbulent channel flow at a Reynolds number of 395 2019 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Shanghai University and Springer-Verlag GmbH Germany, part of Springer Nature 2019 Abstract A direct-forcing fictitious domain (DFFD) method is used to perform fully resolved numerical simulations of turbulent channel flows laden with large neutrally buoyant particles. The effects of the particles on the turbulence (including the mean velocity, the root mean square (RMS) of the velocity fluctuation, the probability density function (PDF) of the velocity, and the vortex structures) at a friction Reynolds number of 395 are investigated. The results show that the drag-reduction effect caused by finite-size spherical particles at low particle volumes is negligibly small. The particle effects on the RMS velocities at Reτ = 395 are significantly smaller than those at Reτ = 180, despite qualitatively the same effects, i.e., the presence of particles decreases the maximum streamwise RMS velocity near the wall via weakening the large-scale streamwise vortices, and increases the transverse and spanwise RMS velocities in the vicinity of the wall by inducing smaller-scale vortices. The effects of the particles on the PDFs of the fluid fluctuating velocities normalized with the RMS velocities are small, regardless of the particle size, the particle volume fraction, and the Reynolds number. Zhu, Chenlin aut Wang, Yu aut Shao, Xueming aut Enthalten in Ying yong shu xue he li xue / English edition Shanghai University, 1980 40(2019), 2 vom: 23. Jan., Seite 293-304 (DE-627)130523747 (DE-600)770632-7 (DE-576)016095987 0253-4827 nnns volume:40 year:2019 number:2 day:23 month:01 pages:293-304 https://doi.org/10.1007/s10483-019-2426-8 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-MAT SSG-OPC-MAT GBV_ILN_40 GBV_ILN_70 AR 40 2019 2 23 01 293-304 |
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10.1007/s10483-019-2426-8 doi (DE-627)OLC2042878898 (DE-He213)s10483-019-2426-8-p DE-627 ger DE-627 rakwb eng 510 VZ Yu, Zhaosheng verfasserin aut Effects of finite-size neutrally buoyant particles on the turbulent channel flow at a Reynolds number of 395 2019 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Shanghai University and Springer-Verlag GmbH Germany, part of Springer Nature 2019 Abstract A direct-forcing fictitious domain (DFFD) method is used to perform fully resolved numerical simulations of turbulent channel flows laden with large neutrally buoyant particles. The effects of the particles on the turbulence (including the mean velocity, the root mean square (RMS) of the velocity fluctuation, the probability density function (PDF) of the velocity, and the vortex structures) at a friction Reynolds number of 395 are investigated. The results show that the drag-reduction effect caused by finite-size spherical particles at low particle volumes is negligibly small. The particle effects on the RMS velocities at Reτ = 395 are significantly smaller than those at Reτ = 180, despite qualitatively the same effects, i.e., the presence of particles decreases the maximum streamwise RMS velocity near the wall via weakening the large-scale streamwise vortices, and increases the transverse and spanwise RMS velocities in the vicinity of the wall by inducing smaller-scale vortices. The effects of the particles on the PDFs of the fluid fluctuating velocities normalized with the RMS velocities are small, regardless of the particle size, the particle volume fraction, and the Reynolds number. Zhu, Chenlin aut Wang, Yu aut Shao, Xueming aut Enthalten in Ying yong shu xue he li xue / English edition Shanghai University, 1980 40(2019), 2 vom: 23. Jan., Seite 293-304 (DE-627)130523747 (DE-600)770632-7 (DE-576)016095987 0253-4827 nnns volume:40 year:2019 number:2 day:23 month:01 pages:293-304 https://doi.org/10.1007/s10483-019-2426-8 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-MAT SSG-OPC-MAT GBV_ILN_40 GBV_ILN_70 AR 40 2019 2 23 01 293-304 |
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10.1007/s10483-019-2426-8 doi (DE-627)OLC2042878898 (DE-He213)s10483-019-2426-8-p DE-627 ger DE-627 rakwb eng 510 VZ Yu, Zhaosheng verfasserin aut Effects of finite-size neutrally buoyant particles on the turbulent channel flow at a Reynolds number of 395 2019 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Shanghai University and Springer-Verlag GmbH Germany, part of Springer Nature 2019 Abstract A direct-forcing fictitious domain (DFFD) method is used to perform fully resolved numerical simulations of turbulent channel flows laden with large neutrally buoyant particles. The effects of the particles on the turbulence (including the mean velocity, the root mean square (RMS) of the velocity fluctuation, the probability density function (PDF) of the velocity, and the vortex structures) at a friction Reynolds number of 395 are investigated. The results show that the drag-reduction effect caused by finite-size spherical particles at low particle volumes is negligibly small. The particle effects on the RMS velocities at Reτ = 395 are significantly smaller than those at Reτ = 180, despite qualitatively the same effects, i.e., the presence of particles decreases the maximum streamwise RMS velocity near the wall via weakening the large-scale streamwise vortices, and increases the transverse and spanwise RMS velocities in the vicinity of the wall by inducing smaller-scale vortices. The effects of the particles on the PDFs of the fluid fluctuating velocities normalized with the RMS velocities are small, regardless of the particle size, the particle volume fraction, and the Reynolds number. Zhu, Chenlin aut Wang, Yu aut Shao, Xueming aut Enthalten in Ying yong shu xue he li xue / English edition Shanghai University, 1980 40(2019), 2 vom: 23. Jan., Seite 293-304 (DE-627)130523747 (DE-600)770632-7 (DE-576)016095987 0253-4827 nnns volume:40 year:2019 number:2 day:23 month:01 pages:293-304 https://doi.org/10.1007/s10483-019-2426-8 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-MAT SSG-OPC-MAT GBV_ILN_40 GBV_ILN_70 AR 40 2019 2 23 01 293-304 |
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10.1007/s10483-019-2426-8 doi (DE-627)OLC2042878898 (DE-He213)s10483-019-2426-8-p DE-627 ger DE-627 rakwb eng 510 VZ Yu, Zhaosheng verfasserin aut Effects of finite-size neutrally buoyant particles on the turbulent channel flow at a Reynolds number of 395 2019 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Shanghai University and Springer-Verlag GmbH Germany, part of Springer Nature 2019 Abstract A direct-forcing fictitious domain (DFFD) method is used to perform fully resolved numerical simulations of turbulent channel flows laden with large neutrally buoyant particles. The effects of the particles on the turbulence (including the mean velocity, the root mean square (RMS) of the velocity fluctuation, the probability density function (PDF) of the velocity, and the vortex structures) at a friction Reynolds number of 395 are investigated. The results show that the drag-reduction effect caused by finite-size spherical particles at low particle volumes is negligibly small. The particle effects on the RMS velocities at Reτ = 395 are significantly smaller than those at Reτ = 180, despite qualitatively the same effects, i.e., the presence of particles decreases the maximum streamwise RMS velocity near the wall via weakening the large-scale streamwise vortices, and increases the transverse and spanwise RMS velocities in the vicinity of the wall by inducing smaller-scale vortices. The effects of the particles on the PDFs of the fluid fluctuating velocities normalized with the RMS velocities are small, regardless of the particle size, the particle volume fraction, and the Reynolds number. Zhu, Chenlin aut Wang, Yu aut Shao, Xueming aut Enthalten in Ying yong shu xue he li xue / English edition Shanghai University, 1980 40(2019), 2 vom: 23. Jan., Seite 293-304 (DE-627)130523747 (DE-600)770632-7 (DE-576)016095987 0253-4827 nnns volume:40 year:2019 number:2 day:23 month:01 pages:293-304 https://doi.org/10.1007/s10483-019-2426-8 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-MAT SSG-OPC-MAT GBV_ILN_40 GBV_ILN_70 AR 40 2019 2 23 01 293-304 |
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Abstract A direct-forcing fictitious domain (DFFD) method is used to perform fully resolved numerical simulations of turbulent channel flows laden with large neutrally buoyant particles. The effects of the particles on the turbulence (including the mean velocity, the root mean square (RMS) of the velocity fluctuation, the probability density function (PDF) of the velocity, and the vortex structures) at a friction Reynolds number of 395 are investigated. The results show that the drag-reduction effect caused by finite-size spherical particles at low particle volumes is negligibly small. The particle effects on the RMS velocities at Reτ = 395 are significantly smaller than those at Reτ = 180, despite qualitatively the same effects, i.e., the presence of particles decreases the maximum streamwise RMS velocity near the wall via weakening the large-scale streamwise vortices, and increases the transverse and spanwise RMS velocities in the vicinity of the wall by inducing smaller-scale vortices. The effects of the particles on the PDFs of the fluid fluctuating velocities normalized with the RMS velocities are small, regardless of the particle size, the particle volume fraction, and the Reynolds number. © Shanghai University and Springer-Verlag GmbH Germany, part of Springer Nature 2019 |
| abstractGer |
Abstract A direct-forcing fictitious domain (DFFD) method is used to perform fully resolved numerical simulations of turbulent channel flows laden with large neutrally buoyant particles. The effects of the particles on the turbulence (including the mean velocity, the root mean square (RMS) of the velocity fluctuation, the probability density function (PDF) of the velocity, and the vortex structures) at a friction Reynolds number of 395 are investigated. The results show that the drag-reduction effect caused by finite-size spherical particles at low particle volumes is negligibly small. The particle effects on the RMS velocities at Reτ = 395 are significantly smaller than those at Reτ = 180, despite qualitatively the same effects, i.e., the presence of particles decreases the maximum streamwise RMS velocity near the wall via weakening the large-scale streamwise vortices, and increases the transverse and spanwise RMS velocities in the vicinity of the wall by inducing smaller-scale vortices. The effects of the particles on the PDFs of the fluid fluctuating velocities normalized with the RMS velocities are small, regardless of the particle size, the particle volume fraction, and the Reynolds number. © Shanghai University and Springer-Verlag GmbH Germany, part of Springer Nature 2019 |
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Abstract A direct-forcing fictitious domain (DFFD) method is used to perform fully resolved numerical simulations of turbulent channel flows laden with large neutrally buoyant particles. The effects of the particles on the turbulence (including the mean velocity, the root mean square (RMS) of the velocity fluctuation, the probability density function (PDF) of the velocity, and the vortex structures) at a friction Reynolds number of 395 are investigated. The results show that the drag-reduction effect caused by finite-size spherical particles at low particle volumes is negligibly small. The particle effects on the RMS velocities at Reτ = 395 are significantly smaller than those at Reτ = 180, despite qualitatively the same effects, i.e., the presence of particles decreases the maximum streamwise RMS velocity near the wall via weakening the large-scale streamwise vortices, and increases the transverse and spanwise RMS velocities in the vicinity of the wall by inducing smaller-scale vortices. The effects of the particles on the PDFs of the fluid fluctuating velocities normalized with the RMS velocities are small, regardless of the particle size, the particle volume fraction, and the Reynolds number. © Shanghai University and Springer-Verlag GmbH Germany, part of Springer Nature 2019 |
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Effects of finite-size neutrally buoyant particles on the turbulent channel flow at a Reynolds number of 395 |
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Zhu, Chenlin Wang, Yu Shao, Xueming |
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