Lateral convection and diffusion of sediment in straight rivers

Publication: Research - peer-reviewBook chapter – Annual report year: 1998

Standard

Lateral convection and diffusion of sediment in straight rivers. / Christensen, Henrik Bo; Fredsøe, Jørgen.

River Sedimentation. Rotterdam : Balkema Publishers, A.A. / Taylor & Francis The Netherlands, 1998. p. 39-44.

Publication: Research - peer-reviewBook chapter – Annual report year: 1998

Harvard

Christensen, HB & Fredsøe, J 1998, Lateral convection and diffusion of sediment in straight rivers. in River Sedimentation. Balkema Publishers, A.A. / Taylor & Francis The Netherlands, Rotterdam, pp. 39-44.

APA

Christensen, H. B., & Fredsøe, J. (1998). Lateral convection and diffusion of sediment in straight rivers. In River Sedimentation. (pp. 39-44). Rotterdam: Balkema Publishers, A.A. / Taylor & Francis The Netherlands.

CBE

Christensen HB, Fredsøe J. 1998. Lateral convection and diffusion of sediment in straight rivers. In River Sedimentation. Rotterdam: Balkema Publishers, A.A. / Taylor & Francis The Netherlands. pp. 39-44.

MLA

Christensen, Henrik Bo and Jørgen Fredsøe "Lateral convection and diffusion of sediment in straight rivers". River Sedimentation. Rotterdam: Balkema Publishers, A.A. / Taylor & Francis The Netherlands. 1998. 39-44.

Vancouver

Christensen HB, Fredsøe J. Lateral convection and diffusion of sediment in straight rivers. In River Sedimentation. Rotterdam: Balkema Publishers, A.A. / Taylor & Francis The Netherlands. 1998. p. 39-44.

Author

Christensen, Henrik Bo; Fredsøe, Jørgen / Lateral convection and diffusion of sediment in straight rivers.

River Sedimentation. Rotterdam : Balkema Publishers, A.A. / Taylor & Francis The Netherlands, 1998. p. 39-44.

Publication: Research - peer-reviewBook chapter – Annual report year: 1998

Bibtex

@inbook{a0639b27746a4b159f517f5d9fce695d,
title = "Lateral convection and diffusion of sediment in straight rivers",
author = "Christensen, {Henrik Bo} and Jørgen Fredsøe",
year = "1998",
pages = "39--44",
booktitle = "River Sedimentation",
publisher = "Balkema Publishers, A.A. / Taylor & Francis The Netherlands",

}

RIS

TY - CHAP

T1 - Lateral convection and diffusion of sediment in straight rivers

AU - Christensen,Henrik Bo

AU - Fredsøe,Jørgen

PY - 1998

Y1 - 1998

N2 - The lateral transport of suspended sediment in a straight river cross section with a parabolic shaped bed is studied be use of a k-e and a full Reynolds stress turbulence model. Due to depth variations a lateral transport of suspended sediment is generated. This is mainly caused by the slopping bed and a higher level of turbulence at the channel centre, than in the near bank zones, which means that the ability to support suspended sediment will decrease from the channel centre. The two turbulence models give different estimates for the lateral transport, which mainly are caused by turbulence generated secondary flow cells in the Reynolds stress model. The flow cells make zones with alternately high and low sediment concentration, and thereby much higher local gradients in the lateral direction. Both models found a net inward lateral transport. The transport by convection was found more dominant than diffusion.

AB - The lateral transport of suspended sediment in a straight river cross section with a parabolic shaped bed is studied be use of a k-e and a full Reynolds stress turbulence model. Due to depth variations a lateral transport of suspended sediment is generated. This is mainly caused by the slopping bed and a higher level of turbulence at the channel centre, than in the near bank zones, which means that the ability to support suspended sediment will decrease from the channel centre. The two turbulence models give different estimates for the lateral transport, which mainly are caused by turbulence generated secondary flow cells in the Reynolds stress model. The flow cells make zones with alternately high and low sediment concentration, and thereby much higher local gradients in the lateral direction. Both models found a net inward lateral transport. The transport by convection was found more dominant than diffusion.

M3 - Book chapter

SP - 39

EP - 44

BT - River Sedimentation

PB - Balkema Publishers, A.A. / Taylor & Francis The Netherlands

ER -