IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
Log On
About IAHRDirectoryCommitteesMy IAHRNews & JournalseLibraryeShopEventsJoin IAHRWorld CongressDonate
spacer.gif
spacer.gif eLibrary
spacer.gif eLibrary
You are here : eLibrary : IAHR World Congress Proceedings : 32nd Congress - Venice (2007) : THEME B: Data Acquisition and Processing For Scientific Knowledge and Public Awareness. : Application of an improved r-factor algorithm for tvd schemes on structured and unstructured grids
Application of an improved r-factor algorithm for tvd schemes on structured and unstructured grids
Author : Lianxia Li , Huasheng Liao and Lijian Qi
An improved r-factor algorithm for TVD schemes on structured and unstructured grids within a finite volume method framework has been proposed to numerically approximate the convective term. The new algorithm is tested by two problems of pure convection with a double-step profile in an oblique uniform velocity field and a Smith-Hutton problem in a rotational velocity field. The computational results are compared with the results of Darwish’s r-factor algorithm using Superbee and Osher limiters on both structured and unstructured grids. The numerical results show that the new algorithm can mitigate the oscillation behavior. When using a deferred correction technique to handle the nonlinear term arising from the high resolution schemes, the proposed algorithm showed a smoother and faster convergence
history on structured grids than other algorithms such as that of Darwish’s, while on unstructured grids the presented one is more accurate with a similar convergence history.
File Size : 604,316 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 32nd Congress - Venice (2007)
Article : THEME B: Data Acquisition and Processing For Scientific Knowledge and Public Awareness.
Date Published : 01/07/2007
Download Now