Turbulent transport dissimilarity with modulated turbulence structure in channel flow of viscoelastic fluid
This experimental study investigated the turbulent transport dissimilarity with a modulated turbulence structure in a channel flow of a viscoelastic fluid using simultaneous particle image velocimetry and planar laser-induced fluorescence measurements. An instantaneous dye concentration field with f...
Ausführliche Beschreibung
Autor*in: |
Hara, Shumpei [verfasserIn] |
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Format: |
E-Artikel |
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Sprache: |
Englisch |
Erschienen: |
2020transfer abstract |
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Schlagwörter: |
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Übergeordnetes Werk: |
Enthalten in: COMORBID MILD COGNITIVE IMPAIRMENT AND DEPRESSIVE SYMPTOMS PREDICT FUTURE DEMENTIA IN COMMUNITY OLDER ADULTS: A 24-MONTH FOLLOW-UP LONGITUDINAL STUDY - Makizako, Hyuma ELSEVIER, 2016, Amsterdam [u.a.] |
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Übergeordnetes Werk: |
volume:86 ; year:2020 ; pages:0 |
Links: |
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DOI / URN: |
10.1016/j.ijheatfluidflow.2020.108739 |
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Katalog-ID: |
ELV052420094 |
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520 | |a This experimental study investigated the turbulent transport dissimilarity with a modulated turbulence structure in a channel flow of a viscoelastic fluid using simultaneous particle image velocimetry and planar laser-induced fluorescence measurements. An instantaneous dye concentration field with fluctuating velocity vectors showed that mass was transferred by hierarchically large-scale wavy motions with inclination. A co-spectral analysis showed that the spatial phase modulation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation corresponded to the relaxation time. The occurrence of intense dye concentration fluctuation and small streamwise velocity fluctuation in a thin boundary layer caused dissimilar turbulent transport because of the non-zero negative correlation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation only on large scales. This explains the turbulent transport dissimilarity which leads to the zero averaged Reynolds shear stress and non-zero wall-normal turbulent mass flux. | ||
520 | |a This experimental study investigated the turbulent transport dissimilarity with a modulated turbulence structure in a channel flow of a viscoelastic fluid using simultaneous particle image velocimetry and planar laser-induced fluorescence measurements. An instantaneous dye concentration field with fluctuating velocity vectors showed that mass was transferred by hierarchically large-scale wavy motions with inclination. A co-spectral analysis showed that the spatial phase modulation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation corresponded to the relaxation time. The occurrence of intense dye concentration fluctuation and small streamwise velocity fluctuation in a thin boundary layer caused dissimilar turbulent transport because of the non-zero negative correlation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation only on large scales. This explains the turbulent transport dissimilarity which leads to the zero averaged Reynolds shear stress and non-zero wall-normal turbulent mass flux. | ||
650 | 7 | |a Viscoelastic fluid |2 Elsevier | |
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700 | 1 | |a Kawaguchi, Yasuo |4 oth | |
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10.1016/j.ijheatfluidflow.2020.108739 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001265.pica (DE-627)ELV052420094 (ELSEVIER)S0142-727X(20)30313-1 DE-627 ger DE-627 rakwb eng 610 VZ 530 VZ 52.56 bkl Hara, Shumpei verfasserin aut Turbulent transport dissimilarity with modulated turbulence structure in channel flow of viscoelastic fluid 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier This experimental study investigated the turbulent transport dissimilarity with a modulated turbulence structure in a channel flow of a viscoelastic fluid using simultaneous particle image velocimetry and planar laser-induced fluorescence measurements. An instantaneous dye concentration field with fluctuating velocity vectors showed that mass was transferred by hierarchically large-scale wavy motions with inclination. A co-spectral analysis showed that the spatial phase modulation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation corresponded to the relaxation time. The occurrence of intense dye concentration fluctuation and small streamwise velocity fluctuation in a thin boundary layer caused dissimilar turbulent transport because of the non-zero negative correlation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation only on large scales. This explains the turbulent transport dissimilarity which leads to the zero averaged Reynolds shear stress and non-zero wall-normal turbulent mass flux. This experimental study investigated the turbulent transport dissimilarity with a modulated turbulence structure in a channel flow of a viscoelastic fluid using simultaneous particle image velocimetry and planar laser-induced fluorescence measurements. An instantaneous dye concentration field with fluctuating velocity vectors showed that mass was transferred by hierarchically large-scale wavy motions with inclination. A co-spectral analysis showed that the spatial phase modulation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation corresponded to the relaxation time. The occurrence of intense dye concentration fluctuation and small streamwise velocity fluctuation in a thin boundary layer caused dissimilar turbulent transport because of the non-zero negative correlation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation only on large scales. This explains the turbulent transport dissimilarity which leads to the zero averaged Reynolds shear stress and non-zero wall-normal turbulent mass flux. Viscoelastic fluid Elsevier Turbulent channel flow Elsevier Drag reduction Elsevier PIV/PLIF Elsevier Scalar transfer Elsevier Tsukahara, Takahiro oth Kawaguchi, Yasuo oth Enthalten in Elsevier Science Makizako, Hyuma ELSEVIER COMORBID MILD COGNITIVE IMPAIRMENT AND DEPRESSIVE SYMPTOMS PREDICT FUTURE DEMENTIA IN COMMUNITY OLDER ADULTS: A 24-MONTH FOLLOW-UP LONGITUDINAL STUDY 2016 Amsterdam [u.a.] (DE-627)ELV013777092 volume:86 year:2020 pages:0 https://doi.org/10.1016/j.ijheatfluidflow.2020.108739 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_24 GBV_ILN_40 52.56 Regenerative Energieformen alternative Energieformen VZ AR 86 2020 0 |
spelling |
10.1016/j.ijheatfluidflow.2020.108739 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001265.pica (DE-627)ELV052420094 (ELSEVIER)S0142-727X(20)30313-1 DE-627 ger DE-627 rakwb eng 610 VZ 530 VZ 52.56 bkl Hara, Shumpei verfasserin aut Turbulent transport dissimilarity with modulated turbulence structure in channel flow of viscoelastic fluid 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier This experimental study investigated the turbulent transport dissimilarity with a modulated turbulence structure in a channel flow of a viscoelastic fluid using simultaneous particle image velocimetry and planar laser-induced fluorescence measurements. An instantaneous dye concentration field with fluctuating velocity vectors showed that mass was transferred by hierarchically large-scale wavy motions with inclination. A co-spectral analysis showed that the spatial phase modulation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation corresponded to the relaxation time. The occurrence of intense dye concentration fluctuation and small streamwise velocity fluctuation in a thin boundary layer caused dissimilar turbulent transport because of the non-zero negative correlation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation only on large scales. This explains the turbulent transport dissimilarity which leads to the zero averaged Reynolds shear stress and non-zero wall-normal turbulent mass flux. This experimental study investigated the turbulent transport dissimilarity with a modulated turbulence structure in a channel flow of a viscoelastic fluid using simultaneous particle image velocimetry and planar laser-induced fluorescence measurements. An instantaneous dye concentration field with fluctuating velocity vectors showed that mass was transferred by hierarchically large-scale wavy motions with inclination. A co-spectral analysis showed that the spatial phase modulation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation corresponded to the relaxation time. The occurrence of intense dye concentration fluctuation and small streamwise velocity fluctuation in a thin boundary layer caused dissimilar turbulent transport because of the non-zero negative correlation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation only on large scales. This explains the turbulent transport dissimilarity which leads to the zero averaged Reynolds shear stress and non-zero wall-normal turbulent mass flux. Viscoelastic fluid Elsevier Turbulent channel flow Elsevier Drag reduction Elsevier PIV/PLIF Elsevier Scalar transfer Elsevier Tsukahara, Takahiro oth Kawaguchi, Yasuo oth Enthalten in Elsevier Science Makizako, Hyuma ELSEVIER COMORBID MILD COGNITIVE IMPAIRMENT AND DEPRESSIVE SYMPTOMS PREDICT FUTURE DEMENTIA IN COMMUNITY OLDER ADULTS: A 24-MONTH FOLLOW-UP LONGITUDINAL STUDY 2016 Amsterdam [u.a.] (DE-627)ELV013777092 volume:86 year:2020 pages:0 https://doi.org/10.1016/j.ijheatfluidflow.2020.108739 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_24 GBV_ILN_40 52.56 Regenerative Energieformen alternative Energieformen VZ AR 86 2020 0 |
allfields_unstemmed |
10.1016/j.ijheatfluidflow.2020.108739 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001265.pica (DE-627)ELV052420094 (ELSEVIER)S0142-727X(20)30313-1 DE-627 ger DE-627 rakwb eng 610 VZ 530 VZ 52.56 bkl Hara, Shumpei verfasserin aut Turbulent transport dissimilarity with modulated turbulence structure in channel flow of viscoelastic fluid 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier This experimental study investigated the turbulent transport dissimilarity with a modulated turbulence structure in a channel flow of a viscoelastic fluid using simultaneous particle image velocimetry and planar laser-induced fluorescence measurements. An instantaneous dye concentration field with fluctuating velocity vectors showed that mass was transferred by hierarchically large-scale wavy motions with inclination. A co-spectral analysis showed that the spatial phase modulation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation corresponded to the relaxation time. The occurrence of intense dye concentration fluctuation and small streamwise velocity fluctuation in a thin boundary layer caused dissimilar turbulent transport because of the non-zero negative correlation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation only on large scales. This explains the turbulent transport dissimilarity which leads to the zero averaged Reynolds shear stress and non-zero wall-normal turbulent mass flux. This experimental study investigated the turbulent transport dissimilarity with a modulated turbulence structure in a channel flow of a viscoelastic fluid using simultaneous particle image velocimetry and planar laser-induced fluorescence measurements. An instantaneous dye concentration field with fluctuating velocity vectors showed that mass was transferred by hierarchically large-scale wavy motions with inclination. A co-spectral analysis showed that the spatial phase modulation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation corresponded to the relaxation time. The occurrence of intense dye concentration fluctuation and small streamwise velocity fluctuation in a thin boundary layer caused dissimilar turbulent transport because of the non-zero negative correlation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation only on large scales. This explains the turbulent transport dissimilarity which leads to the zero averaged Reynolds shear stress and non-zero wall-normal turbulent mass flux. Viscoelastic fluid Elsevier Turbulent channel flow Elsevier Drag reduction Elsevier PIV/PLIF Elsevier Scalar transfer Elsevier Tsukahara, Takahiro oth Kawaguchi, Yasuo oth Enthalten in Elsevier Science Makizako, Hyuma ELSEVIER COMORBID MILD COGNITIVE IMPAIRMENT AND DEPRESSIVE SYMPTOMS PREDICT FUTURE DEMENTIA IN COMMUNITY OLDER ADULTS: A 24-MONTH FOLLOW-UP LONGITUDINAL STUDY 2016 Amsterdam [u.a.] (DE-627)ELV013777092 volume:86 year:2020 pages:0 https://doi.org/10.1016/j.ijheatfluidflow.2020.108739 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_24 GBV_ILN_40 52.56 Regenerative Energieformen alternative Energieformen VZ AR 86 2020 0 |
allfieldsGer |
10.1016/j.ijheatfluidflow.2020.108739 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001265.pica (DE-627)ELV052420094 (ELSEVIER)S0142-727X(20)30313-1 DE-627 ger DE-627 rakwb eng 610 VZ 530 VZ 52.56 bkl Hara, Shumpei verfasserin aut Turbulent transport dissimilarity with modulated turbulence structure in channel flow of viscoelastic fluid 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier This experimental study investigated the turbulent transport dissimilarity with a modulated turbulence structure in a channel flow of a viscoelastic fluid using simultaneous particle image velocimetry and planar laser-induced fluorescence measurements. An instantaneous dye concentration field with fluctuating velocity vectors showed that mass was transferred by hierarchically large-scale wavy motions with inclination. A co-spectral analysis showed that the spatial phase modulation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation corresponded to the relaxation time. The occurrence of intense dye concentration fluctuation and small streamwise velocity fluctuation in a thin boundary layer caused dissimilar turbulent transport because of the non-zero negative correlation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation only on large scales. This explains the turbulent transport dissimilarity which leads to the zero averaged Reynolds shear stress and non-zero wall-normal turbulent mass flux. This experimental study investigated the turbulent transport dissimilarity with a modulated turbulence structure in a channel flow of a viscoelastic fluid using simultaneous particle image velocimetry and planar laser-induced fluorescence measurements. An instantaneous dye concentration field with fluctuating velocity vectors showed that mass was transferred by hierarchically large-scale wavy motions with inclination. A co-spectral analysis showed that the spatial phase modulation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation corresponded to the relaxation time. The occurrence of intense dye concentration fluctuation and small streamwise velocity fluctuation in a thin boundary layer caused dissimilar turbulent transport because of the non-zero negative correlation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation only on large scales. This explains the turbulent transport dissimilarity which leads to the zero averaged Reynolds shear stress and non-zero wall-normal turbulent mass flux. Viscoelastic fluid Elsevier Turbulent channel flow Elsevier Drag reduction Elsevier PIV/PLIF Elsevier Scalar transfer Elsevier Tsukahara, Takahiro oth Kawaguchi, Yasuo oth Enthalten in Elsevier Science Makizako, Hyuma ELSEVIER COMORBID MILD COGNITIVE IMPAIRMENT AND DEPRESSIVE SYMPTOMS PREDICT FUTURE DEMENTIA IN COMMUNITY OLDER ADULTS: A 24-MONTH FOLLOW-UP LONGITUDINAL STUDY 2016 Amsterdam [u.a.] (DE-627)ELV013777092 volume:86 year:2020 pages:0 https://doi.org/10.1016/j.ijheatfluidflow.2020.108739 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_24 GBV_ILN_40 52.56 Regenerative Energieformen alternative Energieformen VZ AR 86 2020 0 |
allfieldsSound |
10.1016/j.ijheatfluidflow.2020.108739 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001265.pica (DE-627)ELV052420094 (ELSEVIER)S0142-727X(20)30313-1 DE-627 ger DE-627 rakwb eng 610 VZ 530 VZ 52.56 bkl Hara, Shumpei verfasserin aut Turbulent transport dissimilarity with modulated turbulence structure in channel flow of viscoelastic fluid 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier This experimental study investigated the turbulent transport dissimilarity with a modulated turbulence structure in a channel flow of a viscoelastic fluid using simultaneous particle image velocimetry and planar laser-induced fluorescence measurements. An instantaneous dye concentration field with fluctuating velocity vectors showed that mass was transferred by hierarchically large-scale wavy motions with inclination. A co-spectral analysis showed that the spatial phase modulation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation corresponded to the relaxation time. The occurrence of intense dye concentration fluctuation and small streamwise velocity fluctuation in a thin boundary layer caused dissimilar turbulent transport because of the non-zero negative correlation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation only on large scales. This explains the turbulent transport dissimilarity which leads to the zero averaged Reynolds shear stress and non-zero wall-normal turbulent mass flux. This experimental study investigated the turbulent transport dissimilarity with a modulated turbulence structure in a channel flow of a viscoelastic fluid using simultaneous particle image velocimetry and planar laser-induced fluorescence measurements. An instantaneous dye concentration field with fluctuating velocity vectors showed that mass was transferred by hierarchically large-scale wavy motions with inclination. A co-spectral analysis showed that the spatial phase modulation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation corresponded to the relaxation time. The occurrence of intense dye concentration fluctuation and small streamwise velocity fluctuation in a thin boundary layer caused dissimilar turbulent transport because of the non-zero negative correlation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation only on large scales. This explains the turbulent transport dissimilarity which leads to the zero averaged Reynolds shear stress and non-zero wall-normal turbulent mass flux. Viscoelastic fluid Elsevier Turbulent channel flow Elsevier Drag reduction Elsevier PIV/PLIF Elsevier Scalar transfer Elsevier Tsukahara, Takahiro oth Kawaguchi, Yasuo oth Enthalten in Elsevier Science Makizako, Hyuma ELSEVIER COMORBID MILD COGNITIVE IMPAIRMENT AND DEPRESSIVE SYMPTOMS PREDICT FUTURE DEMENTIA IN COMMUNITY OLDER ADULTS: A 24-MONTH FOLLOW-UP LONGITUDINAL STUDY 2016 Amsterdam [u.a.] (DE-627)ELV013777092 volume:86 year:2020 pages:0 https://doi.org/10.1016/j.ijheatfluidflow.2020.108739 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_24 GBV_ILN_40 52.56 Regenerative Energieformen alternative Energieformen VZ AR 86 2020 0 |
language |
English |
source |
Enthalten in COMORBID MILD COGNITIVE IMPAIRMENT AND DEPRESSIVE SYMPTOMS PREDICT FUTURE DEMENTIA IN COMMUNITY OLDER ADULTS: A 24-MONTH FOLLOW-UP LONGITUDINAL STUDY Amsterdam [u.a.] volume:86 year:2020 pages:0 |
sourceStr |
Enthalten in COMORBID MILD COGNITIVE IMPAIRMENT AND DEPRESSIVE SYMPTOMS PREDICT FUTURE DEMENTIA IN COMMUNITY OLDER ADULTS: A 24-MONTH FOLLOW-UP LONGITUDINAL STUDY Amsterdam [u.a.] volume:86 year:2020 pages:0 |
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Regenerative Energieformen alternative Energieformen |
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Viscoelastic fluid Turbulent channel flow Drag reduction PIV/PLIF Scalar transfer |
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container_title |
COMORBID MILD COGNITIVE IMPAIRMENT AND DEPRESSIVE SYMPTOMS PREDICT FUTURE DEMENTIA IN COMMUNITY OLDER ADULTS: A 24-MONTH FOLLOW-UP LONGITUDINAL STUDY |
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An instantaneous dye concentration field with fluctuating velocity vectors showed that mass was transferred by hierarchically large-scale wavy motions with inclination. A co-spectral analysis showed that the spatial phase modulation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation corresponded to the relaxation time. The occurrence of intense dye concentration fluctuation and small streamwise velocity fluctuation in a thin boundary layer caused dissimilar turbulent transport because of the non-zero negative correlation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation only on large scales. 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turbulent transport dissimilarity with modulated turbulence structure in channel flow of viscoelastic fluid |
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Turbulent transport dissimilarity with modulated turbulence structure in channel flow of viscoelastic fluid |
abstract |
This experimental study investigated the turbulent transport dissimilarity with a modulated turbulence structure in a channel flow of a viscoelastic fluid using simultaneous particle image velocimetry and planar laser-induced fluorescence measurements. An instantaneous dye concentration field with fluctuating velocity vectors showed that mass was transferred by hierarchically large-scale wavy motions with inclination. A co-spectral analysis showed that the spatial phase modulation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation corresponded to the relaxation time. The occurrence of intense dye concentration fluctuation and small streamwise velocity fluctuation in a thin boundary layer caused dissimilar turbulent transport because of the non-zero negative correlation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation only on large scales. This explains the turbulent transport dissimilarity which leads to the zero averaged Reynolds shear stress and non-zero wall-normal turbulent mass flux. |
abstractGer |
This experimental study investigated the turbulent transport dissimilarity with a modulated turbulence structure in a channel flow of a viscoelastic fluid using simultaneous particle image velocimetry and planar laser-induced fluorescence measurements. An instantaneous dye concentration field with fluctuating velocity vectors showed that mass was transferred by hierarchically large-scale wavy motions with inclination. A co-spectral analysis showed that the spatial phase modulation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation corresponded to the relaxation time. The occurrence of intense dye concentration fluctuation and small streamwise velocity fluctuation in a thin boundary layer caused dissimilar turbulent transport because of the non-zero negative correlation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation only on large scales. This explains the turbulent transport dissimilarity which leads to the zero averaged Reynolds shear stress and non-zero wall-normal turbulent mass flux. |
abstract_unstemmed |
This experimental study investigated the turbulent transport dissimilarity with a modulated turbulence structure in a channel flow of a viscoelastic fluid using simultaneous particle image velocimetry and planar laser-induced fluorescence measurements. An instantaneous dye concentration field with fluctuating velocity vectors showed that mass was transferred by hierarchically large-scale wavy motions with inclination. A co-spectral analysis showed that the spatial phase modulation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation corresponded to the relaxation time. The occurrence of intense dye concentration fluctuation and small streamwise velocity fluctuation in a thin boundary layer caused dissimilar turbulent transport because of the non-zero negative correlation of the streamwise velocity and dye concentration fluctuations for the wall-normal velocity fluctuation only on large scales. This explains the turbulent transport dissimilarity which leads to the zero averaged Reynolds shear stress and non-zero wall-normal turbulent mass flux. |
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Turbulent transport dissimilarity with modulated turbulence structure in channel flow of viscoelastic fluid |
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https://doi.org/10.1016/j.ijheatfluidflow.2020.108739 |
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