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Investigation of the Effect of Velocity on Secondary Currents in Semicircular Channels on Hydraulic Jump Parameters

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Iranian Journal of Science and Technology, Transactions of Civil Engineering Aims and scope Submit manuscript

Abstract

Numerical modeling of fluid current on the basis of computational fluid dynamics in comparison with experimental methods has various advantages, including saving time, less design cost and increasing the ability to study complex systems. In the present study, the properties of secondary currents cells in semicircular channels with radius of 0.3, 0.35 and 0.55 m, in the phenomenon of hydraulic jump in flow, were modeled using Flow-3D software. The modeling results showed that the velocity of the cells of the secondary currents in the horizontal direction (perpendicular to the axis of flow) (X) was greater in the semicircular sections with a radius of 0.3 m. Moreover, it was observed that the velocity of the secondary currents cells in the vertical direction (perpendicular to the current bed) (Z) was greater in the semicircular sections with a radius of 0.55 m and also hydraulic jump energy depreciation occurs more jump lengths, which was maximum at radius of 0.3 m.

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Data Availability

Upon request, the associated data can be provided.

Code Availability

In this research, Flow-3D software was used.

Abbreviations

W :

Is velocity components in horizontal direction (m/s)

V :

Is velocity components in vertical direction (m/s)

ϑ :

Is kinematic viscosity (m2/s)

\(\overline{v}^{2}\) :

Reynolds normal stress (vertical)

\(\overline{w}^{2}\) :

Reynolds normal stress (horizontal)

Vx:

Is velocity of secondary currents in horizontal direction (m/s)

Vz:

Is velocity of secondary currents in vertical direction (m/s)

L j :

Is length of hydraulic jump (m)

Ψ :

Is function of flow

Y 2/Y 1 :

Is sequent depth ratio

Fr1 :

Is Froude number before hydraulic jump

Y 2 :

Is secondary depth of hydraulic jump (m)

Y :

Is depth of flow (m)

Z :

Is depth of channel (m)

L :

Is length of channel (m)

R :

Is radius of channel (m)

ρ :

Is fluid specific mass (kg/m3)

µ :

Is dynamic fluid viscosity (Pa s)

κ :

Is Van-Carmen coefficient

CFD:

Is computational fluid dynamic

P :

Is hydrostatic pressure (Pa)

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Authors and Affiliations

  1. Department of Civil Engineering of Hydraulic Structures, Aras Branch, Islamic Azad University, Jolfa, Iran

    Bahador Fatehi-Nobarian

  2. Civil Engineering of Hydraulic Structures, Islamic Azad University, Tabriz Branch, Tabriz, Iran

    Razieh Panahi

  3. Center of Excellence in Hydroinformatics, Faculty of Civil Engineering, University of Tabriz, P.O. Box: 51666, Tabriz, Iran

    Vahid Nourani

  4. Faculty of Civil and Environmental Engineering, Near East University, Near East Boulevard, 99138, Mersin, Turkey

    Vahid Nourani

Authors
  1. Bahador Fatehi-Nobarian
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  2. Razieh Panahi
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  3. Vahid Nourani
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Contributions

RP has conducted the literature review, simulations and data collection process. Dr. BFN and Prof. VN accomplished the data and result analysis and interpretation. In addition, the final drafting and revisions were also approved by Prof. VN and Dr. BFN.

Corresponding author

Correspondence to Vahid Nourani.

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Fatehi-Nobarian, B., Panahi, R. & Nourani, V. Investigation of the Effect of Velocity on Secondary Currents in Semicircular Channels on Hydraulic Jump Parameters. Iran J Sci Technol Trans Civ Eng 46, 3351–3359 (2022). https://doi.org/10.1007/s40996-021-00800-x

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  • DOI: https://doi.org/10.1007/s40996-021-00800-x

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