Modeling flows over gravel beds by a body force method

C. Zeng; Chi Wai Li

doi:10.1063/1.3651934

Modeling flows over gravel beds by a body force method

C. Zeng, Chi Wai Li

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

Abstract

A Reynolds-averaged Navier-stokes equations (RANS) model using the body force method (BFM) has been developed to simulate open-channel flows over gravel beds. The momentum equation is modified by introducing the form drag as an extra body force term to represent the gravel-bed resistance. By applying the body force within the roughness layer of the flow over small-scale roughness, it is found that the body force coefficient frk varies inversely with the roughness length scale ks. The method is robust, not sensitive to mesh resolution and is easily extended to deal with large scale roughness.

Original language	English
Title of host publication	Recent Progresses in Fluid Dynamics Research - Proceedings of the Sixth International Conference on Fluid Mechanics, ICFM VI
Pages	417-420
Number of pages	4
Volume	1376
DOIs	https://doi.org/10.1063/1.3651934
Publication status	Published - 8 Nov 2011
Event	Proceedings of the 6th International Conference on Fluid Mechanics: Recent Progresses in Fluid Dynamics Research, ICFM VI - Guangzhou, China Duration: 30 Jun 2011 → 3 Jul 2011

Conference

Conference	Proceedings of the 6th International Conference on Fluid Mechanics: Recent Progresses in Fluid Dynamics Research, ICFM VI
Country	China
City	Guangzhou
Period	30/06/11 → 3/07/11

Keywords

body force method
gravel beds
open-channel flows
RANS modeling
turbulent flows

ASJC Scopus subject areas

Physics and Astronomy(all)

More information

10.1063/1.3651934

Cite this

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title = "Modeling flows over gravel beds by a body force method",

abstract = "A Reynolds-averaged Navier-stokes equations (RANS) model using the body force method (BFM) has been developed to simulate open-channel flows over gravel beds. The momentum equation is modified by introducing the form drag as an extra body force term to represent the gravel-bed resistance. By applying the body force within the roughness layer of the flow over small-scale roughness, it is found that the body force coefficient frk varies inversely with the roughness length scale ks. The method is robust, not sensitive to mesh resolution and is easily extended to deal with large scale roughness.",

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Zeng, C & Li, CW 2011, Modeling flows over gravel beds by a body force method. in Recent Progresses in Fluid Dynamics Research - Proceedings of the Sixth International Conference on Fluid Mechanics, ICFM VI. vol. 1376, pp. 417-420, Proceedings of the 6th International Conference on Fluid Mechanics: Recent Progresses in Fluid Dynamics Research, ICFM VI, Guangzhou, China, 30/06/11. https://doi.org/10.1063/1.3651934

Modeling flows over gravel beds by a body force method. / Zeng, C.; Li, Chi Wai.

Recent Progresses in Fluid Dynamics Research - Proceedings of the Sixth International Conference on Fluid Mechanics, ICFM VI. Vol. 1376 2011. p. 417-420.

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

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