Limitations of advective transport calculations in rivers

S. G. Wallis; J. R. Manson

Limitations of advective transport calculations in rivers

S. G. Wallis, J. R. Manson

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The results of numerical experiments expose fundamental limitations to the accuracy of solute transport calculations in popular river modelling software such as MIKE11 and QUAL2E. Although unconditionally stable, the implicit Eulerian finite difference schemes used become excessively inaccurate when run with Courant numbers much greater than unity. In contrast, the authors' DISCUS scheme maintains high accuracy at all Courant numbers. It does this by virtue of its Lagrangian nature which recognizes, and is in sympathy with, the physical nature of advection. The adoption of this sort of approach is recommended to all modellers.

Original language	English
Title of host publication	Proceedings of Environmental and Coastal Hydraulics: Protecting the Aquatic Environment
Pages	1286-1291
Number of pages	6
Volume	B pt 2
Publication status	Published - 1997
Event	27th Congress of the International Association of Hydraulic Research - San Francisco, CA, United States Duration: 10 Aug 1997 → 15 Aug 1997

Conference

Conference	27th Congress of the International Association of Hydraulic Research
Country/Territory	United States
City	San Francisco, CA
Period	10/08/97 → 15/08/97

Cite this

@inproceedings{ccf6e2dd12be4341a15e0594f67c9dfb,

title = "Limitations of advective transport calculations in rivers",

abstract = "The results of numerical experiments expose fundamental limitations to the accuracy of solute transport calculations in popular river modelling software such as MIKE11 and QUAL2E. Although unconditionally stable, the implicit Eulerian finite difference schemes used become excessively inaccurate when run with Courant numbers much greater than unity. In contrast, the authors' DISCUS scheme maintains high accuracy at all Courant numbers. It does this by virtue of its Lagrangian nature which recognizes, and is in sympathy with, the physical nature of advection. The adoption of this sort of approach is recommended to all modellers.",

author = "Wallis, {S. G.} and Manson, {J. R.}",

year = "1997",

language = "English",

isbn = " 978-0-7844-0272-6",

volume = "B pt 2",

pages = "1286--1291",

booktitle = "Proceedings of Environmental and Coastal Hydraulics: Protecting the Aquatic Environment",

note = "27th Congress of the International Association of Hydraulic Research ; Conference date: 10-08-1997 Through 15-08-1997",

}

TY - GEN

T1 - Limitations of advective transport calculations in rivers

AU - Wallis, S. G.

AU - Manson, J. R.

PY - 1997

Y1 - 1997

N2 - The results of numerical experiments expose fundamental limitations to the accuracy of solute transport calculations in popular river modelling software such as MIKE11 and QUAL2E. Although unconditionally stable, the implicit Eulerian finite difference schemes used become excessively inaccurate when run with Courant numbers much greater than unity. In contrast, the authors' DISCUS scheme maintains high accuracy at all Courant numbers. It does this by virtue of its Lagrangian nature which recognizes, and is in sympathy with, the physical nature of advection. The adoption of this sort of approach is recommended to all modellers.

AB - The results of numerical experiments expose fundamental limitations to the accuracy of solute transport calculations in popular river modelling software such as MIKE11 and QUAL2E. Although unconditionally stable, the implicit Eulerian finite difference schemes used become excessively inaccurate when run with Courant numbers much greater than unity. In contrast, the authors' DISCUS scheme maintains high accuracy at all Courant numbers. It does this by virtue of its Lagrangian nature which recognizes, and is in sympathy with, the physical nature of advection. The adoption of this sort of approach is recommended to all modellers.

UR - http://www.scopus.com/inward/record.url?scp=0030673973&partnerID=8YFLogxK

M3 - Conference contribution

SN - 978-0-7844-0272-6

VL - B pt 2

SP - 1286

EP - 1291

BT - Proceedings of Environmental and Coastal Hydraulics: Protecting the Aquatic Environment

T2 - 27th Congress of the International Association of Hydraulic Research

Y2 - 10 August 1997 through 15 August 1997

ER -

Limitations of advective transport calculations in rivers

Abstract

Conference

Other files and links

Fingerprint

Cite this