Comments on «Modeling stratified suspension concentration distribution in turbulent flow using fractional advection–diffusion equation» by Snehasis Kundu, environmental fluid mechanics, https://doi.org/10.1007/s10652-019–09,679-9
Abstract In a paper published in Environmental Fluid Mechanics, Kundu proposed an interesting study about modeling suspended sediment concentrations profiles in turbulent open-channel flows. The used model is based on fractional advection–diffusion equation and incorporates the effects of non-local...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Absi, Rafik [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2021 |
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| Schlagwörter: |
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| Anmerkung: |
© The Author(s), under exclusive licence to Springer Nature B.V. 2021 |
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| Übergeordnetes Werk: |
Enthalten in: Environmental fluid mechanics - Dordrecht [u.a.] : Springer Science + Business Media B.V, 2001, 21(2021), 6 vom: 29. Okt., Seite 1189-1196 |
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| Übergeordnetes Werk: |
volume:21 ; year:2021 ; number:6 ; day:29 ; month:10 ; pages:1189-1196 |
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| DOI / URN: |
10.1007/s10652-021-09821-6 |
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| Katalog-ID: |
SPR045780684 |
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| 520 | |a Abstract In a paper published in Environmental Fluid Mechanics, Kundu proposed an interesting study about modeling suspended sediment concentrations profiles in turbulent open-channel flows. The used model is based on fractional advection–diffusion equation and incorporates the effects of non-local transport of particles, stratification, hindered settling velocity and damping of mixing length. Kundu’s model needs vertical profiles for mixing velocity and mixing length. Despite the interest, the study shows a weakness about Kundu’s choice of these two parameters and a related contradiction. Due to this shortcoming, the proposed model of sediment diffusivity is questionable. In this note, the weakness is pointed out. We comment on the choice of Kundu of these two parameters which are in contradiction with the used parabolic neutral eddy viscosity profile. We show that velocity profiles obtained from an eddy viscosity based on Kundu’s parameters are inaccurate. The mixing velocity and the model of sediment diffusivity are corrected and improved eddy viscosity formulations are presented. | ||
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10.1007/s10652-021-09821-6 doi (DE-627)SPR045780684 (SPR)s10652-021-09821-6-e DE-627 ger DE-627 rakwb eng Absi, Rafik verfasserin (orcid)0000-0002-3226-4057 aut Comments on «Modeling stratified suspension concentration distribution in turbulent flow using fractional advection–diffusion equation» by Snehasis Kundu, environmental fluid mechanics, https://doi.org/10.1007/s10652-019–09,679-9 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer Nature B.V. 2021 Abstract In a paper published in Environmental Fluid Mechanics, Kundu proposed an interesting study about modeling suspended sediment concentrations profiles in turbulent open-channel flows. The used model is based on fractional advection–diffusion equation and incorporates the effects of non-local transport of particles, stratification, hindered settling velocity and damping of mixing length. Kundu’s model needs vertical profiles for mixing velocity and mixing length. Despite the interest, the study shows a weakness about Kundu’s choice of these two parameters and a related contradiction. Due to this shortcoming, the proposed model of sediment diffusivity is questionable. In this note, the weakness is pointed out. We comment on the choice of Kundu of these two parameters which are in contradiction with the used parabolic neutral eddy viscosity profile. We show that velocity profiles obtained from an eddy viscosity based on Kundu’s parameters are inaccurate. The mixing velocity and the model of sediment diffusivity are corrected and improved eddy viscosity formulations are presented. Eddy viscosity (dpeaa)DE-He213 Mixing velocity (dpeaa)DE-He213 Mixing length (dpeaa)DE-He213 Sediment diffusivity (dpeaa)DE-He213 Open-channel flow (dpeaa)DE-He213 Velocity profiles (dpeaa)DE-He213 Enthalten in Environmental fluid mechanics Dordrecht [u.a.] : Springer Science + Business Media B.V, 2001 21(2021), 6 vom: 29. Okt., Seite 1189-1196 (DE-627)325610029 (DE-600)2037932-8 1573-1510 nnns volume:21 year:2021 number:6 day:29 month:10 pages:1189-1196 https://dx.doi.org/10.1007/s10652-021-09821-6 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 21 2021 6 29 10 1189-1196 |
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10.1007/s10652-021-09821-6 doi (DE-627)SPR045780684 (SPR)s10652-021-09821-6-e DE-627 ger DE-627 rakwb eng Absi, Rafik verfasserin (orcid)0000-0002-3226-4057 aut Comments on «Modeling stratified suspension concentration distribution in turbulent flow using fractional advection–diffusion equation» by Snehasis Kundu, environmental fluid mechanics, https://doi.org/10.1007/s10652-019–09,679-9 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer Nature B.V. 2021 Abstract In a paper published in Environmental Fluid Mechanics, Kundu proposed an interesting study about modeling suspended sediment concentrations profiles in turbulent open-channel flows. The used model is based on fractional advection–diffusion equation and incorporates the effects of non-local transport of particles, stratification, hindered settling velocity and damping of mixing length. Kundu’s model needs vertical profiles for mixing velocity and mixing length. Despite the interest, the study shows a weakness about Kundu’s choice of these two parameters and a related contradiction. Due to this shortcoming, the proposed model of sediment diffusivity is questionable. In this note, the weakness is pointed out. We comment on the choice of Kundu of these two parameters which are in contradiction with the used parabolic neutral eddy viscosity profile. We show that velocity profiles obtained from an eddy viscosity based on Kundu’s parameters are inaccurate. The mixing velocity and the model of sediment diffusivity are corrected and improved eddy viscosity formulations are presented. Eddy viscosity (dpeaa)DE-He213 Mixing velocity (dpeaa)DE-He213 Mixing length (dpeaa)DE-He213 Sediment diffusivity (dpeaa)DE-He213 Open-channel flow (dpeaa)DE-He213 Velocity profiles (dpeaa)DE-He213 Enthalten in Environmental fluid mechanics Dordrecht [u.a.] : Springer Science + Business Media B.V, 2001 21(2021), 6 vom: 29. Okt., Seite 1189-1196 (DE-627)325610029 (DE-600)2037932-8 1573-1510 nnns volume:21 year:2021 number:6 day:29 month:10 pages:1189-1196 https://dx.doi.org/10.1007/s10652-021-09821-6 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 21 2021 6 29 10 1189-1196 |
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10.1007/s10652-021-09821-6 doi (DE-627)SPR045780684 (SPR)s10652-021-09821-6-e DE-627 ger DE-627 rakwb eng Absi, Rafik verfasserin (orcid)0000-0002-3226-4057 aut Comments on «Modeling stratified suspension concentration distribution in turbulent flow using fractional advection–diffusion equation» by Snehasis Kundu, environmental fluid mechanics, https://doi.org/10.1007/s10652-019–09,679-9 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer Nature B.V. 2021 Abstract In a paper published in Environmental Fluid Mechanics, Kundu proposed an interesting study about modeling suspended sediment concentrations profiles in turbulent open-channel flows. The used model is based on fractional advection–diffusion equation and incorporates the effects of non-local transport of particles, stratification, hindered settling velocity and damping of mixing length. Kundu’s model needs vertical profiles for mixing velocity and mixing length. Despite the interest, the study shows a weakness about Kundu’s choice of these two parameters and a related contradiction. Due to this shortcoming, the proposed model of sediment diffusivity is questionable. In this note, the weakness is pointed out. We comment on the choice of Kundu of these two parameters which are in contradiction with the used parabolic neutral eddy viscosity profile. We show that velocity profiles obtained from an eddy viscosity based on Kundu’s parameters are inaccurate. The mixing velocity and the model of sediment diffusivity are corrected and improved eddy viscosity formulations are presented. Eddy viscosity (dpeaa)DE-He213 Mixing velocity (dpeaa)DE-He213 Mixing length (dpeaa)DE-He213 Sediment diffusivity (dpeaa)DE-He213 Open-channel flow (dpeaa)DE-He213 Velocity profiles (dpeaa)DE-He213 Enthalten in Environmental fluid mechanics Dordrecht [u.a.] : Springer Science + Business Media B.V, 2001 21(2021), 6 vom: 29. Okt., Seite 1189-1196 (DE-627)325610029 (DE-600)2037932-8 1573-1510 nnns volume:21 year:2021 number:6 day:29 month:10 pages:1189-1196 https://dx.doi.org/10.1007/s10652-021-09821-6 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 21 2021 6 29 10 1189-1196 |
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10.1007/s10652-021-09821-6 doi (DE-627)SPR045780684 (SPR)s10652-021-09821-6-e DE-627 ger DE-627 rakwb eng Absi, Rafik verfasserin (orcid)0000-0002-3226-4057 aut Comments on «Modeling stratified suspension concentration distribution in turbulent flow using fractional advection–diffusion equation» by Snehasis Kundu, environmental fluid mechanics, https://doi.org/10.1007/s10652-019–09,679-9 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer Nature B.V. 2021 Abstract In a paper published in Environmental Fluid Mechanics, Kundu proposed an interesting study about modeling suspended sediment concentrations profiles in turbulent open-channel flows. The used model is based on fractional advection–diffusion equation and incorporates the effects of non-local transport of particles, stratification, hindered settling velocity and damping of mixing length. Kundu’s model needs vertical profiles for mixing velocity and mixing length. Despite the interest, the study shows a weakness about Kundu’s choice of these two parameters and a related contradiction. Due to this shortcoming, the proposed model of sediment diffusivity is questionable. In this note, the weakness is pointed out. We comment on the choice of Kundu of these two parameters which are in contradiction with the used parabolic neutral eddy viscosity profile. We show that velocity profiles obtained from an eddy viscosity based on Kundu’s parameters are inaccurate. The mixing velocity and the model of sediment diffusivity are corrected and improved eddy viscosity formulations are presented. Eddy viscosity (dpeaa)DE-He213 Mixing velocity (dpeaa)DE-He213 Mixing length (dpeaa)DE-He213 Sediment diffusivity (dpeaa)DE-He213 Open-channel flow (dpeaa)DE-He213 Velocity profiles (dpeaa)DE-He213 Enthalten in Environmental fluid mechanics Dordrecht [u.a.] : Springer Science + Business Media B.V, 2001 21(2021), 6 vom: 29. Okt., Seite 1189-1196 (DE-627)325610029 (DE-600)2037932-8 1573-1510 nnns volume:21 year:2021 number:6 day:29 month:10 pages:1189-1196 https://dx.doi.org/10.1007/s10652-021-09821-6 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 21 2021 6 29 10 1189-1196 |
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10.1007/s10652-021-09821-6 doi (DE-627)SPR045780684 (SPR)s10652-021-09821-6-e DE-627 ger DE-627 rakwb eng Absi, Rafik verfasserin (orcid)0000-0002-3226-4057 aut Comments on «Modeling stratified suspension concentration distribution in turbulent flow using fractional advection–diffusion equation» by Snehasis Kundu, environmental fluid mechanics, https://doi.org/10.1007/s10652-019–09,679-9 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s), under exclusive licence to Springer Nature B.V. 2021 Abstract In a paper published in Environmental Fluid Mechanics, Kundu proposed an interesting study about modeling suspended sediment concentrations profiles in turbulent open-channel flows. The used model is based on fractional advection–diffusion equation and incorporates the effects of non-local transport of particles, stratification, hindered settling velocity and damping of mixing length. Kundu’s model needs vertical profiles for mixing velocity and mixing length. Despite the interest, the study shows a weakness about Kundu’s choice of these two parameters and a related contradiction. Due to this shortcoming, the proposed model of sediment diffusivity is questionable. In this note, the weakness is pointed out. We comment on the choice of Kundu of these two parameters which are in contradiction with the used parabolic neutral eddy viscosity profile. We show that velocity profiles obtained from an eddy viscosity based on Kundu’s parameters are inaccurate. The mixing velocity and the model of sediment diffusivity are corrected and improved eddy viscosity formulations are presented. Eddy viscosity (dpeaa)DE-He213 Mixing velocity (dpeaa)DE-He213 Mixing length (dpeaa)DE-He213 Sediment diffusivity (dpeaa)DE-He213 Open-channel flow (dpeaa)DE-He213 Velocity profiles (dpeaa)DE-He213 Enthalten in Environmental fluid mechanics Dordrecht [u.a.] : Springer Science + Business Media B.V, 2001 21(2021), 6 vom: 29. Okt., Seite 1189-1196 (DE-627)325610029 (DE-600)2037932-8 1573-1510 nnns volume:21 year:2021 number:6 day:29 month:10 pages:1189-1196 https://dx.doi.org/10.1007/s10652-021-09821-6 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 AR 21 2021 6 29 10 1189-1196 |
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Comments on «Modeling stratified suspension concentration distribution in turbulent flow using fractional advection–diffusion equation» by Snehasis Kundu, environmental fluid mechanics, https://doi.org/10.1007/s10652-019–09,679-9 Eddy viscosity (dpeaa)DE-He213 Mixing velocity (dpeaa)DE-He213 Mixing length (dpeaa)DE-He213 Sediment diffusivity (dpeaa)DE-He213 Open-channel flow (dpeaa)DE-He213 Velocity profiles (dpeaa)DE-He213 |
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Comments on «Modeling stratified suspension concentration distribution in turbulent flow using fractional advection–diffusion equation» by Snehasis Kundu, environmental fluid mechanics, https://doi.org/10.1007/s10652-019–09,679-9 |
| abstract |
Abstract In a paper published in Environmental Fluid Mechanics, Kundu proposed an interesting study about modeling suspended sediment concentrations profiles in turbulent open-channel flows. The used model is based on fractional advection–diffusion equation and incorporates the effects of non-local transport of particles, stratification, hindered settling velocity and damping of mixing length. Kundu’s model needs vertical profiles for mixing velocity and mixing length. Despite the interest, the study shows a weakness about Kundu’s choice of these two parameters and a related contradiction. Due to this shortcoming, the proposed model of sediment diffusivity is questionable. In this note, the weakness is pointed out. We comment on the choice of Kundu of these two parameters which are in contradiction with the used parabolic neutral eddy viscosity profile. We show that velocity profiles obtained from an eddy viscosity based on Kundu’s parameters are inaccurate. The mixing velocity and the model of sediment diffusivity are corrected and improved eddy viscosity formulations are presented. © The Author(s), under exclusive licence to Springer Nature B.V. 2021 |
| abstractGer |
Abstract In a paper published in Environmental Fluid Mechanics, Kundu proposed an interesting study about modeling suspended sediment concentrations profiles in turbulent open-channel flows. The used model is based on fractional advection–diffusion equation and incorporates the effects of non-local transport of particles, stratification, hindered settling velocity and damping of mixing length. Kundu’s model needs vertical profiles for mixing velocity and mixing length. Despite the interest, the study shows a weakness about Kundu’s choice of these two parameters and a related contradiction. Due to this shortcoming, the proposed model of sediment diffusivity is questionable. In this note, the weakness is pointed out. We comment on the choice of Kundu of these two parameters which are in contradiction with the used parabolic neutral eddy viscosity profile. We show that velocity profiles obtained from an eddy viscosity based on Kundu’s parameters are inaccurate. The mixing velocity and the model of sediment diffusivity are corrected and improved eddy viscosity formulations are presented. © The Author(s), under exclusive licence to Springer Nature B.V. 2021 |
| abstract_unstemmed |
Abstract In a paper published in Environmental Fluid Mechanics, Kundu proposed an interesting study about modeling suspended sediment concentrations profiles in turbulent open-channel flows. The used model is based on fractional advection–diffusion equation and incorporates the effects of non-local transport of particles, stratification, hindered settling velocity and damping of mixing length. Kundu’s model needs vertical profiles for mixing velocity and mixing length. Despite the interest, the study shows a weakness about Kundu’s choice of these two parameters and a related contradiction. Due to this shortcoming, the proposed model of sediment diffusivity is questionable. In this note, the weakness is pointed out. We comment on the choice of Kundu of these two parameters which are in contradiction with the used parabolic neutral eddy viscosity profile. We show that velocity profiles obtained from an eddy viscosity based on Kundu’s parameters are inaccurate. The mixing velocity and the model of sediment diffusivity are corrected and improved eddy viscosity formulations are presented. © The Author(s), under exclusive licence to Springer Nature B.V. 2021 |
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Comments on «Modeling stratified suspension concentration distribution in turbulent flow using fractional advection–diffusion equation» by Snehasis Kundu, environmental fluid mechanics, https://doi.org/10.1007/s10652-019–09,679-9 |
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