Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Flow Characteristics in a Two-Stage Vegetated Compound Trapezoidal Channel
https://orcid.org/http://orcid.org/0000-0002-7557-5373
In this paper, the impact of vegetation on various flow parameters that create a complex flow field between the main channel and the two-stage floodplains has been studied. A three-dimensional computational model of Reynolds stress turbulence code FLUENT (ANSYS) simulated the various flow and turbulence characteristics. The geometry consisted of a two-stage compound channel, in which the flow structure of both vegetated (with varying density) and non-vegetated cases was studied. The results showed that an array of vegetation along a two-stage floodplain imparted more flow resistance as compared to a single-stage floodplain which resulted in shifting higher velocities zone toward the main channel flow. Moreover, for a dense arrangement of vegetation, depth-averaged velocity increased from 16 to 28% for three different flow depths measured at the center of the main channel, i.e., Y/B = 0.2 (where Y represents the transverse direction and B is the channel width). Due to the gradient of secondary flow, velocities, and vortices between the main channel and both floodplains, transverse shear stresses were higher around the vegetation. Vegetated two-stage floodplains acquire low turbulence and Reynolds stresses, thus making them suitable for sedimentation and the formation of biological species.
Flow Characteristics in a Two-Stage Vegetated Compound Trapezoidal Channel
https://orcid.org/http://orcid.org/0000-0002-7557-5373
In this paper, the impact of vegetation on various flow parameters that create a complex flow field between the main channel and the two-stage floodplains has been studied. A three-dimensional computational model of Reynolds stress turbulence code FLUENT (ANSYS) simulated the various flow and turbulence characteristics. The geometry consisted of a two-stage compound channel, in which the flow structure of both vegetated (with varying density) and non-vegetated cases was studied. The results showed that an array of vegetation along a two-stage floodplain imparted more flow resistance as compared to a single-stage floodplain which resulted in shifting higher velocities zone toward the main channel flow. Moreover, for a dense arrangement of vegetation, depth-averaged velocity increased from 16 to 28% for three different flow depths measured at the center of the main channel, i.e., Y/B = 0.2 (where Y represents the transverse direction and B is the channel width). Due to the gradient of secondary flow, velocities, and vortices between the main channel and both floodplains, transverse shear stresses were higher around the vegetation. Vegetated two-stage floodplains acquire low turbulence and Reynolds stresses, thus making them suitable for sedimentation and the formation of biological species.
Flow Characteristics in a Two-Stage Vegetated Compound Trapezoidal Channel
https://orcid.org/http://orcid.org/0000-0002-7557-5373
In this paper, the impact of vegetation on various flow parameters that create a complex flow field between the main channel and the two-stage floodplains has been studied. A three-dimensional computational model of Reynolds stress turbulence code FLUENT (ANSYS) simulated the various flow and turbulence characteristics. The geometry consisted of a two-stage compound channel, in which the flow structure of both vegetated (with varying density) and non-vegetated cases was studied. The results showed that an array of vegetation along a two-stage floodplain imparted more flow resistance as compared to a single-stage floodplain which resulted in shifting higher velocities zone toward the main channel flow. Moreover, for a dense arrangement of vegetation, depth-averaged velocity increased from 16 to 28% for three different flow depths measured at the center of the main channel, i.e., Y/B = 0.2 (where Y represents the transverse direction and B is the channel width). Due to the gradient of secondary flow, velocities, and vortices between the main channel and both floodplains, transverse shear stresses were higher around the vegetation. Vegetated two-stage floodplains acquire low turbulence and Reynolds stresses, thus making them suitable for sedimentation and the formation of biological species.
Flow Characteristics in a Two-Stage Vegetated Compound Trapezoidal Channel
Iran J Sci Technol Trans Civ Eng
Pasha, Ghufran Ahmed (Autor:in) / Ghumman, Abdul Razzaq (Autor:in) / Naseer, Muhammad Junaid (Autor:in) / Iqbal, Sohail (Autor:in) / Ahmed, Afzal (Autor:in)
01.02.2023
13 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Numerical investigation of flow through vegetated multi-stage compound channel
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Flow Resistance in Compound Vegetated Channel
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| HENRY – Bundesanstalt für Wasserbau (BAW) | 2008
Unsteady flow characteristics in compound channels with vegetated flood plains
| British Library Conference Proceedings | 1995
Comparison of Flood-Flow Structure between Compound Channel and Channel with Vegetated Zone
| British Library Conference Proceedings | 1993