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Estimate of Drag Coefficient for a Finite Patch of Rigid Cylinders

Cheng, Nian-Sheng / Hui, Cai Ling / Chen, Xingwei

This note presents laboratory measurements of the drag coefficient for a finite patch of vegetation that was simulated with a limited number of rigid cylindrical rods. The experiment was designed based on an analogy between the drag imposed by a vegetation patch in an open-channel flow and that experienced by the patch settling in a water tank. The results show that the average drag coefficient calculated from the measured settling velocity can be expressed as a function of the patch porosity. The experimental data are also consistent with previous predictions by large eddy simulations.

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Estimate of Drag Coefficient for a Finite Patch of Rigid Cylinders

Cheng, Nian-Sheng / Hui, Cai Ling / Chen, Xingwei

This note presents laboratory measurements of the drag coefficient for a finite patch of vegetation that was simulated with a limited number of rigid cylindrical rods. The experiment was designed based on an analogy between the drag imposed by a vegetation patch in an open-channel flow and that experienced by the patch settling in a water tank. The results show that the average drag coefficient calculated from the measured settling velocity can be expressed as a function of the patch porosity. The experimental data are also consistent with previous predictions by large eddy simulations.

Estimate of Drag Coefficient for a Finite Patch of Rigid Cylinders

Cheng, Nian-Sheng / Hui, Cai Ling / Chen, Xingwei

This note presents laboratory measurements of the drag coefficient for a finite patch of vegetation that was simulated with a limited number of rigid cylindrical rods. The experiment was designed based on an analogy between the drag imposed by a vegetation patch in an open-channel flow and that experienced by the patch settling in a water tank. The results show that the average drag coefficient calculated from the measured settling velocity can be expressed as a function of the patch porosity. The experimental data are also consistent with previous predictions by large eddy simulations.

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Title:

Estimate of Drag Coefficient for a Finite Patch of Rigid Cylinders

Contributors:

Cheng, Nian-Sheng (author) / Hui, Cai Ling (author) / Chen, Xingwei (author)

Published in:

Journal of Hydraulic Engineering ; 145

Publication date:

2018-11-24

ISSN:

0733-9429 , 1943-7900

DOI:

https://doi.org/10.1061/(ASCE)HY.1943-7900.0001561

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

Unknown

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