Secondary ﬂow and bed slope eﬀects contributing to ill-posedness in river modelling

Victor Chavarrias Borras; W. Ottevanger; R.M.J. Schielen; Astrid Blom

Secondary ﬂow and bed slope eﬀects contributing to ill-posedness in river modelling

Victor Chavarrias Borras, W. Ottevanger, R.M.J. Schielen, Astrid Blom

Rivers, Ports, Waterways and Dredging Engineering

Research output: Contribution to conference › Abstract › Scientific

Abstract

Two-dimensional fl ow models are widely used and necessary to predict phenomena such as the dynamics of bars. In these problems the effect of the bed slope in the direction of the sediment transport rate needs to be accounted for to obtain physically realistic results. This effect is included using an empirical closure relation. Even including bed slope effects, 2D models do not capture 3D phenomena such as secondary fl ow which occurs when the fl ow curvature
is large. This process is accounted for in a parameterized manner including one equation to model the advection and diffusion of the secondary fl ow intensity.

Original language	English
Pages	84-85
Publication status	Published - 2018
Event	NCR-Days 2018: The future river, Celebrating 20 years NCR - Deltares, Delft, Netherlands Duration: 8 Feb 2018 → 9 Feb 2018 Conference number: 20 https://ncr-web.org/wp-content/uploads/2018/02/ncr-42-ncrdays2018_bookofabstracts-web.pdf

Conference

Conference	NCR-Days 2018
Country/Territory	Netherlands
City	Delft
Period	8/02/18 → 9/02/18
Internet address	https://ncr-web.org/wp-content/uploads/2018/02/ncr-42-ncrdays2018_bookofabstracts-web.pdf

Keywords

2D morphodynamics
ill-posed problems

Cite this

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title = "Secondary ﬂow and bed slope eﬀects contributing to ill-posedness in river modelling",

abstract = "Two-dimensional fl ow models are widely used and necessary to predict phenomena such as the dynamics of bars. In these problems the effect of the bed slope in the direction of the sediment transport rate needs to be accounted for to obtain physically realistic results. This effect is included using an empirical closure relation. Even including bed slope effects, 2D models do not capture 3D phenomena such as secondary fl ow which occurs when the fl ow curvatureis large. This process is accounted for in a parameterized manner including one equation to model the advection and diffusion of the secondary fl ow intensity.",

keywords = "2D morphodynamics, ill-posed problems",

author = "{Chavarrias Borras}, Victor and W. Ottevanger and R.M.J. Schielen and Astrid Blom",

year = "2018",

language = "English",

pages = "84--85",

note = "NCR-Days 2018 : The future river, Celebrating 20 years NCR ; Conference date: 08-02-2018 Through 09-02-2018",

url = "https://ncr-web.org/wp-content/uploads/2018/02/ncr-42-ncrdays2018_bookofabstracts-web.pdf",

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TY - CONF

T1 - Secondary ﬂow and bed slope eﬀects contributing to ill-posedness in river modelling

AU - Chavarrias Borras, Victor

AU - Ottevanger, W.

AU - Schielen, R.M.J.

AU - Blom, Astrid

N1 - Conference code: 20

PY - 2018

Y1 - 2018

N2 - Two-dimensional fl ow models are widely used and necessary to predict phenomena such as the dynamics of bars. In these problems the effect of the bed slope in the direction of the sediment transport rate needs to be accounted for to obtain physically realistic results. This effect is included using an empirical closure relation. Even including bed slope effects, 2D models do not capture 3D phenomena such as secondary fl ow which occurs when the fl ow curvatureis large. This process is accounted for in a parameterized manner including one equation to model the advection and diffusion of the secondary fl ow intensity.

AB - Two-dimensional fl ow models are widely used and necessary to predict phenomena such as the dynamics of bars. In these problems the effect of the bed slope in the direction of the sediment transport rate needs to be accounted for to obtain physically realistic results. This effect is included using an empirical closure relation. Even including bed slope effects, 2D models do not capture 3D phenomena such as secondary fl ow which occurs when the fl ow curvatureis large. This process is accounted for in a parameterized manner including one equation to model the advection and diffusion of the secondary fl ow intensity.

KW - 2D morphodynamics

KW - ill-posed problems

UR - https://ncr-web.org/wp-content/uploads/2018/02/ncr-42-ncrdays2018_bookofabstracts-web.pdf

M3 - Abstract

SP - 84

EP - 85

T2 - NCR-Days 2018

Y2 - 8 February 2018 through 9 February 2018

ER -

Secondary ﬂow and bed slope eﬀects contributing to ill-posedness in river modelling

Abstract

Conference

Keywords

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