Semianalytical Solution for Simultaneous Distribution of Fluid Velocity and Sediment Concentration in Open-Channel Flow

Mohan, Shiv; Kumbhakar, Manotosh; Ghoshal, Koeli; Kumar, Jitendra

doi:10.1061/(asce)em.1943-7889.0001671

Cited by 18 publications

(3 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is known as hindered settling effect. Many researchers ( [18], [19], [6], [11], [20], [21]) included this important phenomenon of hindered settling into their study.…”

Section: Introductionmentioning

confidence: 99%

Unsteady numerical simulation of suspended load in relation to grain-size distribution

Hossain

Mohan

Ghoshal

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

A theoretical model is presented here for the transient grain-size distribution of non-uniform sediment in suspension based on the advection-diffusion equation in a turbulent open channel flow. The effect of particle-particle interaction is included in the reference level computation. Additionally, pick-up probability, non-ceasing probability and incipient probability of sediment particles are incorporated in the calculation of reference concentration. In addition, the present model accounts for the influence of non-uniform sediment on settling velocity. Non-uniform sediments settle at a different velocity compared to uniform sediment and the difference in settling velocity in suspension influences their concentration in suspension. When settling velocity is calculated from uniform and non-uniform sediment expressions, the concentration difference is notable, especially in medium-size particles. The governing equations in the proposed model are solved using OpenFOAM, an open source finite volume method (FVM) based framework. It is observed that in the transient grain-size distribution, unimodality first appears and then, as time progresses, transforms to bimodality and then remains bimodal. It is also found that the grain-size distribution becomes more skewed at the finer end with increasing vertical height. The numerical results under steady-state conditions depict good correspondence with the experimental data available in the literature.

show abstract

“…This is known as hindered settling effect. Many researchers ( [18], [19], [6], [11], [20], [21]) included this important phenomenon of hindered settling into their study.…”

Section: Introductionmentioning

confidence: 99%

Unsteady numerical simulation of suspended load in relation to grain-size distribution

Hossain

Mohan

Ghoshal

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…Regarding the latter method, although it is attractive to establish a fine‐grid numerical model, which potentially account for the physics of processes under adjusting conditions, to predict the detailed SSC and sediment transport. However, it is difficult to set up in practice and may be over‐parameterized, and reliable prediction is hard to achieve for large‐scale and long‐term modeling, due to the complexity of the turbulent flow, sediment movement and bed material distributions (Dey, 2014; Le et al., 2019; Lodhia et al., 2019; Mohan et al., 2019; Wu, 2008). Therefore, a hybrid method, which is capable of coupling the primary characteristics of physics and the conciseness of empirical models, is deemed to be a more effective choice for analyzing the long‐term variation in the sediment regime in large dammed rivers.…”

Section: Introductionmentioning

confidence: 99%

Severely Declining Suspended Sediment Concentration in the Heavily Dammed Changjiang Fluvial System

Sun

Zhang

et al. 2021

Water Resources Research

View full text Add to dashboard Cite

show abstract

“…Since then, HAM has been successfully applied to solve many non-linear problems [29][30][31][32][33][34][35][36] , though applicability of HAM in the area of sediment transport is too limited. To the best of the authors' knowledge, very few works [37][38][39][40] showed the application of HAM in the area of sediment transport. The present study finds an explicit series solution through HAM by solving Hunt [2] equation which has been modified by using total diffusion coefficient as a sum of sediment diffusion coefficient, shear-induced diffusivity coefficient against concentration gradient and shear-induced diffusivity coefficient against the shear gradient together with the hindered settling effect and a non-unit ratio of sediment and momentum diffusion coefficient.…”

Section: Introductionmentioning

confidence: 99%

Vertical sediment concentration distribution revisited with shear-induced diffusivity: An explicit series solution based on homotopy analysis method

Jain,

Kumbhakar,

Ghoshal

2020

Preprint

Self Cite

View full text Add to dashboard Cite

The present study revisits the vertical distribution of suspended sediment concentration in an open channel flow with a special attention to sediment diffusion coefficient. If turbulent diffusivity is considered to follow a parabolic-type profile, the diffusivity coefficient is zero at the bed and very small near the bed; so alone it may not be enough to diffuse the particles from bed-load layer to suspension region. Leighton & Acrivos (J.

show abstract

Semianalytical Solution for Simultaneous Distribution of Fluid Velocity and Sediment Concentration in Open-Channel Flow

Cited by 18 publications

References 55 publications

Unsteady numerical simulation of suspended load in relation to grain-size distribution

Unsteady numerical simulation of suspended load in relation to grain-size distribution

Severely Declining Suspended Sediment Concentration in the Heavily Dammed Changjiang Fluvial System

Vertical sediment concentration distribution revisited with shear-induced diffusivity: An explicit series solution based on homotopy analysis method

Contact Info

Product

Resources

About