The Effect of a Low-Frequency Structure on Passive Scalar Transport in the Flow Over a Surface-Mounted Rib
Abstract The unsteadiness of the flow over a surface-mounted rib involving passive scalar transport is studied using large-eddy simulation (LES) at a Reynolds number of 3000 (based on the rib height, $h$, and the free-stream velocity, $U_{0})$. The purpose of the present study is to gain further ins...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Gu, Hailin [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2018 |
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| Schlagwörter: |
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| Anmerkung: |
© Springer Science+Business Media B.V., part of Springer Nature 2018 |
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| Übergeordnetes Werk: |
Enthalten in: Flow, turbulence and combustion - Springer Netherlands, 1998, 101(2018), 3 vom: 08. Mai, Seite 719-740 |
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| Übergeordnetes Werk: |
volume:101 ; year:2018 ; number:3 ; day:08 ; month:05 ; pages:719-740 |
| Links: |
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| DOI / URN: |
10.1007/s10494-018-9929-z |
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OLC2059578000 |
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| 520 | |a Abstract The unsteadiness of the flow over a surface-mounted rib involving passive scalar transport is studied using large-eddy simulation (LES) at a Reynolds number of 3000 (based on the rib height, $h$, and the free-stream velocity, $U_{0})$. The purpose of the present study is to gain further insight into the physical origin of the flow instability and its effect on passive scalar transport. Fourier spectral analysis of the velocity at different positions suggests that, in addition to the K-H instability in the shear layer (St ≈ 0.42), two lower frequencies (St ≈ 0.06 and 0.09) also exist. It is observed that the low-frequency instabilities accompany the shedding process of vortical structures. One low frequency, at $\text {St}\approx 0.06$, is related to the pumping motion of the recirculation bubble, while the other, at $\text {St}\approx 0.09$, is associated with the flapping mode of the shear layer. Through comparisons of velocity and temperature fields and the spectra of scalar fluctuations, it is found that the passive scalar is transported by the convection of vortical structures. | ||
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| 700 | 1 | |a Sun, Feiyang |4 aut | |
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10.1007/s10494-018-9929-z doi (DE-627)OLC2059578000 (DE-He213)s10494-018-9929-z-p DE-627 ger DE-627 rakwb eng 500 600 VZ 50.34$jGasdynamik$jAerodynamik bkl 52.51$jFeuerungstechnik bkl Gu, Hailin verfasserin aut The Effect of a Low-Frequency Structure on Passive Scalar Transport in the Flow Over a Surface-Mounted Rib 2018 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer Science+Business Media B.V., part of Springer Nature 2018 Abstract The unsteadiness of the flow over a surface-mounted rib involving passive scalar transport is studied using large-eddy simulation (LES) at a Reynolds number of 3000 (based on the rib height, $h$, and the free-stream velocity, $U_{0})$. The purpose of the present study is to gain further insight into the physical origin of the flow instability and its effect on passive scalar transport. Fourier spectral analysis of the velocity at different positions suggests that, in addition to the K-H instability in the shear layer (St ≈ 0.42), two lower frequencies (St ≈ 0.06 and 0.09) also exist. It is observed that the low-frequency instabilities accompany the shedding process of vortical structures. One low frequency, at $\text {St}\approx 0.06$, is related to the pumping motion of the recirculation bubble, while the other, at $\text {St}\approx 0.09$, is associated with the flapping mode of the shear layer. Through comparisons of velocity and temperature fields and the spectra of scalar fluctuations, it is found that the passive scalar is transported by the convection of vortical structures. Separated-reattaching flow Flow structure Passive scalar transport LES Liu, Minghou aut Li, Xinlong aut Huang, Hongjie aut Wu, Yiqiang aut Sun, Feiyang aut Enthalten in Flow, turbulence and combustion Springer Netherlands, 1998 101(2018), 3 vom: 08. Mai, Seite 719-740 (DE-627)254303641 (DE-600)1463163-5 (DE-576)074754068 1386-6184 nnns volume:101 year:2018 number:3 day:08 month:05 pages:719-740 https://doi.org/10.1007/s10494-018-9929-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-CHE GBV_ILN_11 GBV_ILN_70 GBV_ILN_2014 GBV_ILN_4323 GBV_ILN_4700 50.34$jGasdynamik$jAerodynamik VZ 106419498 (DE-625)106419498 52.51$jFeuerungstechnik VZ 106419935 (DE-625)106419935 AR 101 2018 3 08 05 719-740 |
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10.1007/s10494-018-9929-z doi (DE-627)OLC2059578000 (DE-He213)s10494-018-9929-z-p DE-627 ger DE-627 rakwb eng 500 600 VZ 50.34$jGasdynamik$jAerodynamik bkl 52.51$jFeuerungstechnik bkl Gu, Hailin verfasserin aut The Effect of a Low-Frequency Structure on Passive Scalar Transport in the Flow Over a Surface-Mounted Rib 2018 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer Science+Business Media B.V., part of Springer Nature 2018 Abstract The unsteadiness of the flow over a surface-mounted rib involving passive scalar transport is studied using large-eddy simulation (LES) at a Reynolds number of 3000 (based on the rib height, $h$, and the free-stream velocity, $U_{0})$. The purpose of the present study is to gain further insight into the physical origin of the flow instability and its effect on passive scalar transport. Fourier spectral analysis of the velocity at different positions suggests that, in addition to the K-H instability in the shear layer (St ≈ 0.42), two lower frequencies (St ≈ 0.06 and 0.09) also exist. It is observed that the low-frequency instabilities accompany the shedding process of vortical structures. One low frequency, at $\text {St}\approx 0.06$, is related to the pumping motion of the recirculation bubble, while the other, at $\text {St}\approx 0.09$, is associated with the flapping mode of the shear layer. Through comparisons of velocity and temperature fields and the spectra of scalar fluctuations, it is found that the passive scalar is transported by the convection of vortical structures. Separated-reattaching flow Flow structure Passive scalar transport LES Liu, Minghou aut Li, Xinlong aut Huang, Hongjie aut Wu, Yiqiang aut Sun, Feiyang aut Enthalten in Flow, turbulence and combustion Springer Netherlands, 1998 101(2018), 3 vom: 08. Mai, Seite 719-740 (DE-627)254303641 (DE-600)1463163-5 (DE-576)074754068 1386-6184 nnns volume:101 year:2018 number:3 day:08 month:05 pages:719-740 https://doi.org/10.1007/s10494-018-9929-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-CHE GBV_ILN_11 GBV_ILN_70 GBV_ILN_2014 GBV_ILN_4323 GBV_ILN_4700 50.34$jGasdynamik$jAerodynamik VZ 106419498 (DE-625)106419498 52.51$jFeuerungstechnik VZ 106419935 (DE-625)106419935 AR 101 2018 3 08 05 719-740 |
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10.1007/s10494-018-9929-z doi (DE-627)OLC2059578000 (DE-He213)s10494-018-9929-z-p DE-627 ger DE-627 rakwb eng 500 600 VZ 50.34$jGasdynamik$jAerodynamik bkl 52.51$jFeuerungstechnik bkl Gu, Hailin verfasserin aut The Effect of a Low-Frequency Structure on Passive Scalar Transport in the Flow Over a Surface-Mounted Rib 2018 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer Science+Business Media B.V., part of Springer Nature 2018 Abstract The unsteadiness of the flow over a surface-mounted rib involving passive scalar transport is studied using large-eddy simulation (LES) at a Reynolds number of 3000 (based on the rib height, $h$, and the free-stream velocity, $U_{0})$. The purpose of the present study is to gain further insight into the physical origin of the flow instability and its effect on passive scalar transport. Fourier spectral analysis of the velocity at different positions suggests that, in addition to the K-H instability in the shear layer (St ≈ 0.42), two lower frequencies (St ≈ 0.06 and 0.09) also exist. It is observed that the low-frequency instabilities accompany the shedding process of vortical structures. One low frequency, at $\text {St}\approx 0.06$, is related to the pumping motion of the recirculation bubble, while the other, at $\text {St}\approx 0.09$, is associated with the flapping mode of the shear layer. Through comparisons of velocity and temperature fields and the spectra of scalar fluctuations, it is found that the passive scalar is transported by the convection of vortical structures. Separated-reattaching flow Flow structure Passive scalar transport LES Liu, Minghou aut Li, Xinlong aut Huang, Hongjie aut Wu, Yiqiang aut Sun, Feiyang aut Enthalten in Flow, turbulence and combustion Springer Netherlands, 1998 101(2018), 3 vom: 08. Mai, Seite 719-740 (DE-627)254303641 (DE-600)1463163-5 (DE-576)074754068 1386-6184 nnns volume:101 year:2018 number:3 day:08 month:05 pages:719-740 https://doi.org/10.1007/s10494-018-9929-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-CHE GBV_ILN_11 GBV_ILN_70 GBV_ILN_2014 GBV_ILN_4323 GBV_ILN_4700 50.34$jGasdynamik$jAerodynamik VZ 106419498 (DE-625)106419498 52.51$jFeuerungstechnik VZ 106419935 (DE-625)106419935 AR 101 2018 3 08 05 719-740 |
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10.1007/s10494-018-9929-z doi (DE-627)OLC2059578000 (DE-He213)s10494-018-9929-z-p DE-627 ger DE-627 rakwb eng 500 600 VZ 50.34$jGasdynamik$jAerodynamik bkl 52.51$jFeuerungstechnik bkl Gu, Hailin verfasserin aut The Effect of a Low-Frequency Structure on Passive Scalar Transport in the Flow Over a Surface-Mounted Rib 2018 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer Science+Business Media B.V., part of Springer Nature 2018 Abstract The unsteadiness of the flow over a surface-mounted rib involving passive scalar transport is studied using large-eddy simulation (LES) at a Reynolds number of 3000 (based on the rib height, $h$, and the free-stream velocity, $U_{0})$. The purpose of the present study is to gain further insight into the physical origin of the flow instability and its effect on passive scalar transport. Fourier spectral analysis of the velocity at different positions suggests that, in addition to the K-H instability in the shear layer (St ≈ 0.42), two lower frequencies (St ≈ 0.06 and 0.09) also exist. It is observed that the low-frequency instabilities accompany the shedding process of vortical structures. One low frequency, at $\text {St}\approx 0.06$, is related to the pumping motion of the recirculation bubble, while the other, at $\text {St}\approx 0.09$, is associated with the flapping mode of the shear layer. Through comparisons of velocity and temperature fields and the spectra of scalar fluctuations, it is found that the passive scalar is transported by the convection of vortical structures. Separated-reattaching flow Flow structure Passive scalar transport LES Liu, Minghou aut Li, Xinlong aut Huang, Hongjie aut Wu, Yiqiang aut Sun, Feiyang aut Enthalten in Flow, turbulence and combustion Springer Netherlands, 1998 101(2018), 3 vom: 08. Mai, Seite 719-740 (DE-627)254303641 (DE-600)1463163-5 (DE-576)074754068 1386-6184 nnns volume:101 year:2018 number:3 day:08 month:05 pages:719-740 https://doi.org/10.1007/s10494-018-9929-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-CHE GBV_ILN_11 GBV_ILN_70 GBV_ILN_2014 GBV_ILN_4323 GBV_ILN_4700 50.34$jGasdynamik$jAerodynamik VZ 106419498 (DE-625)106419498 52.51$jFeuerungstechnik VZ 106419935 (DE-625)106419935 AR 101 2018 3 08 05 719-740 |
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10.1007/s10494-018-9929-z doi (DE-627)OLC2059578000 (DE-He213)s10494-018-9929-z-p DE-627 ger DE-627 rakwb eng 500 600 VZ 50.34$jGasdynamik$jAerodynamik bkl 52.51$jFeuerungstechnik bkl Gu, Hailin verfasserin aut The Effect of a Low-Frequency Structure on Passive Scalar Transport in the Flow Over a Surface-Mounted Rib 2018 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer Science+Business Media B.V., part of Springer Nature 2018 Abstract The unsteadiness of the flow over a surface-mounted rib involving passive scalar transport is studied using large-eddy simulation (LES) at a Reynolds number of 3000 (based on the rib height, $h$, and the free-stream velocity, $U_{0})$. The purpose of the present study is to gain further insight into the physical origin of the flow instability and its effect on passive scalar transport. Fourier spectral analysis of the velocity at different positions suggests that, in addition to the K-H instability in the shear layer (St ≈ 0.42), two lower frequencies (St ≈ 0.06 and 0.09) also exist. It is observed that the low-frequency instabilities accompany the shedding process of vortical structures. One low frequency, at $\text {St}\approx 0.06$, is related to the pumping motion of the recirculation bubble, while the other, at $\text {St}\approx 0.09$, is associated with the flapping mode of the shear layer. Through comparisons of velocity and temperature fields and the spectra of scalar fluctuations, it is found that the passive scalar is transported by the convection of vortical structures. Separated-reattaching flow Flow structure Passive scalar transport LES Liu, Minghou aut Li, Xinlong aut Huang, Hongjie aut Wu, Yiqiang aut Sun, Feiyang aut Enthalten in Flow, turbulence and combustion Springer Netherlands, 1998 101(2018), 3 vom: 08. Mai, Seite 719-740 (DE-627)254303641 (DE-600)1463163-5 (DE-576)074754068 1386-6184 nnns volume:101 year:2018 number:3 day:08 month:05 pages:719-740 https://doi.org/10.1007/s10494-018-9929-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-CHE GBV_ILN_11 GBV_ILN_70 GBV_ILN_2014 GBV_ILN_4323 GBV_ILN_4700 50.34$jGasdynamik$jAerodynamik VZ 106419498 (DE-625)106419498 52.51$jFeuerungstechnik VZ 106419935 (DE-625)106419935 AR 101 2018 3 08 05 719-740 |
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The Effect of a Low-Frequency Structure on Passive Scalar Transport in the Flow Over a Surface-Mounted Rib |
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Abstract The unsteadiness of the flow over a surface-mounted rib involving passive scalar transport is studied using large-eddy simulation (LES) at a Reynolds number of 3000 (based on the rib height, $h$, and the free-stream velocity, $U_{0})$. The purpose of the present study is to gain further insight into the physical origin of the flow instability and its effect on passive scalar transport. Fourier spectral analysis of the velocity at different positions suggests that, in addition to the K-H instability in the shear layer (St ≈ 0.42), two lower frequencies (St ≈ 0.06 and 0.09) also exist. It is observed that the low-frequency instabilities accompany the shedding process of vortical structures. One low frequency, at $\text {St}\approx 0.06$, is related to the pumping motion of the recirculation bubble, while the other, at $\text {St}\approx 0.09$, is associated with the flapping mode of the shear layer. Through comparisons of velocity and temperature fields and the spectra of scalar fluctuations, it is found that the passive scalar is transported by the convection of vortical structures. © Springer Science+Business Media B.V., part of Springer Nature 2018 |
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Abstract The unsteadiness of the flow over a surface-mounted rib involving passive scalar transport is studied using large-eddy simulation (LES) at a Reynolds number of 3000 (based on the rib height, $h$, and the free-stream velocity, $U_{0})$. The purpose of the present study is to gain further insight into the physical origin of the flow instability and its effect on passive scalar transport. Fourier spectral analysis of the velocity at different positions suggests that, in addition to the K-H instability in the shear layer (St ≈ 0.42), two lower frequencies (St ≈ 0.06 and 0.09) also exist. It is observed that the low-frequency instabilities accompany the shedding process of vortical structures. One low frequency, at $\text {St}\approx 0.06$, is related to the pumping motion of the recirculation bubble, while the other, at $\text {St}\approx 0.09$, is associated with the flapping mode of the shear layer. Through comparisons of velocity and temperature fields and the spectra of scalar fluctuations, it is found that the passive scalar is transported by the convection of vortical structures. © Springer Science+Business Media B.V., part of Springer Nature 2018 |
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Abstract The unsteadiness of the flow over a surface-mounted rib involving passive scalar transport is studied using large-eddy simulation (LES) at a Reynolds number of 3000 (based on the rib height, $h$, and the free-stream velocity, $U_{0})$. The purpose of the present study is to gain further insight into the physical origin of the flow instability and its effect on passive scalar transport. Fourier spectral analysis of the velocity at different positions suggests that, in addition to the K-H instability in the shear layer (St ≈ 0.42), two lower frequencies (St ≈ 0.06 and 0.09) also exist. It is observed that the low-frequency instabilities accompany the shedding process of vortical structures. One low frequency, at $\text {St}\approx 0.06$, is related to the pumping motion of the recirculation bubble, while the other, at $\text {St}\approx 0.09$, is associated with the flapping mode of the shear layer. Through comparisons of velocity and temperature fields and the spectra of scalar fluctuations, it is found that the passive scalar is transported by the convection of vortical structures. © Springer Science+Business Media B.V., part of Springer Nature 2018 |
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