3-D Flood Flow Structures in a Doubly Meandering Compound Channel under Dominant Relative Depth

Simulations of Depth-Averaged Streamwise Velocity of Meandering Compound Channel using TELEMAC Modules

E3S Web of Conferences ◽

10.1051/e3sconf/20186507001 ◽

2018 ◽

Vol 65 ◽

pp. 07001

Author(s):

Abdul Haslim Abdul Shukor Lim ◽

Zulhilmi Ismai ◽

Mohamad Hidayat Jama ◽

Md. Ridzuan Makhtar

Keyword(s):

Stokes Equations ◽

Computing Time ◽

Streamwise Velocity ◽

Main Channel ◽

Navier Stokes ◽

Relative Depth ◽

Compound Channel ◽

Navier Stokes Equations ◽

Numerical Tools ◽

Good Agreement

Capabilities of numerical tools to simulate fluid problems significantly depend on its methods to solve for the Navier-Stokes equations. Different dimensional computing tools using the same horizontal meshes were used to simulate flow conditions inside non- and vegetation meandering compound channel. Both tools give good agreement for simulations of depth-averaged streamwise velocity inside the main channel, but its capabilities vary significantly for simulations on floodplains. Lower relative depth recorded a higher percentage of errors than flow with higher relative depth. Vegetation along the main channel increased the flows complexity especially in the area near the vegetation thus reducing the simulation capabilities of the computing tools. Simulations work by TELEMAC-3D significantly better in the areas with highly dimensional and turbulence conditions. TELEMAC-2D is still useful because of its simplicity and lower computing time and resources required.

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Flood Flow Analysis During Rising and Falling Stages in a Doubly Meandering Compound Channel

Advances in Water Resources and Hydraulic Engineering ◽

10.1007/978-3-540-89465-0_68 ◽

2009 ◽

pp. 387-392

Author(s):

Islam G. M. Tarekul ◽

Kawahara Yoshihisa ◽

Tamai Nobuyuki

Keyword(s):

Flow Analysis ◽

Compound Channel ◽

Flood Flow

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LDA measurements of coherent flow structures and cross-flow across the gap of a compound channel with two half-rods

Nuclear Engineering and Design ◽

10.1016/j.nucengdes.2017.10.023 ◽

2018 ◽

Vol 326 ◽

pp. 17-30 ◽

Cited By ~ 6

Author(s):

F. Bertocchi ◽

M. Rohde ◽

J.L. Kloosterman

Keyword(s):

Cross Flow ◽

Flow Structures ◽

Compound Channel ◽

Coherent Flow Structures

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EXPERIMENTAL STUDY OF FLOW STRUCTURES IN A DOUBLE MEANDERING COMPOUND CHANNEL

PROCEEDINGS OF HYDRAULIC ENGINEERING ◽

10.2208/prohe.44.873 ◽

2000 ◽

Vol 44 ◽

pp. 873-878 ◽

Cited By ~ 1

Author(s):

Kenichiio KOBAYASHI ◽

Nobuyuki TAMAI ◽

G.M.Tarekul ISlam

Keyword(s):

Experimental Study ◽

Flow Structures ◽

Compound Channel

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Coherent flow structures in a converging compound channel

River Flow 2004 ◽

10.1201/b16998-55 ◽

2004 ◽

pp. 423-430

Author(s):

D Bousmar ◽

B Denis ◽

Y Zech

Keyword(s):

Flow Structures ◽

Compound Channel ◽

Coherent Flow Structures

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Investigating the Effect of Relative Width on Momentum Transfer between Main Channel and Floodplain in Rough Rectangular Compound Channel Sunder Varius Relative Depth Condition

Open Journal of Geology ◽

10.4236/ojg.2016.64020 ◽

2016 ◽

Vol 06 (04) ◽

pp. 225-231 ◽

Cited By ~ 5

Author(s):

Shima Bahadori ◽

Mehdi Behdarvandi Askar

Keyword(s):

Momentum Transfer ◽

Main Channel ◽

Relative Depth ◽

Relative Width ◽

Compound Channel ◽

Depth Condition

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INVESTIGATION OF PLAN SHAPE FEATURES IN COMPOUND MEANDERING CHANNELS AND CLASSIFICATION OF FLOOD FLOW CHAEZACTERISTICS USING SINUOSITY AND RELATIVE DEPTH

PROCEEDINGS OF HYDRAULIC ENGINEERING ◽

10.2208/prohe.46.761 ◽

2002 ◽

Vol 46 ◽

pp. 761-766

Author(s):

Shoji OKADA ◽

Shoji FUKUOKA ◽

Saori SADAMUNE

Keyword(s):

Relative Depth ◽

Shape Features ◽

Meandering Channels ◽

Flood Flow

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Flow and Heat Transfer Characteristics of Single Jet Impinging on Dimpled Surface

Journal of Heat Transfer ◽

10.1115/1.4023360 ◽

2013 ◽

Vol 135 (5) ◽

Cited By ~ 19

Author(s):

Yonghui Xie ◽

Ping Li ◽

Jibing Lan ◽

Di Zhang

Keyword(s):

Heat Transfer ◽

Nusselt Number ◽

Average Nusselt Number ◽

Heat Transfer Process ◽

Flow Structures ◽

Relative Depth ◽

Heat Transfer Characteristics ◽

Flow And Heat Transfer ◽

Baseline Case ◽

Single Jet

Based on combined particle image velocimetry (PIV) and numerical simulation, the flow and heat transfer characteristics of a single jet impinging on a dimpled surface for Dj/D = 0.318, 0.5, 1.045; δ/D = 0.1, 0.2, 0.3; Rej = 5000, 10,000, 23,000, were investigated for the first time. The distance between jet nozzle and plate was fixed and equal to H/D = 2. The results show that the flow structures of the single jet impingement with dimpled target surface can be summarized into three typical conceptual flow structures. Particularly, the third flow structure in the form of a large toroidal vortex bound up with the dimple is the result of the centrifugal force of the flow deflection at the stagnation region and spherical centrifugal force of the deep dimple surface. The heat transfer area increases when the dimple relative depth increases. For the cases of Dj/D = 0.318 and 0.5, the area increasing dominate the heat transfer process, and the average Nusselt number increases with the increasing of dimple relative depth. For the cases with Dj/D = 1.045, the local Nusselt number reduction dominate the heat transfer process, the average Nusselt number decreases with the increasing of dimple relative depth. The average Nusselt number of the Dj/D = 0.318 and 0.5 cases is larger than the baseline case, while those of the Dj/D = 1.045 cases are smaller than the baseline case. Furthermore, the correlative expressions of the local Nusselt number, stagnation points Nusselt number and average Nusselt number are obtained.

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