Force and torque model sensitivity and coarse graining for bedload-dominated sediment transport

Guan, Liheng; Salinas, Jorge S.; Zgheib, Nadim; Balachandar, S.

doi:10.1016/j.euromechflu.2021.09.005

Cited by 6 publications

(2 citation statements)

References 47 publications

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“…2001; Dritselis & Vlachos 2008; Eaton 2009; Zhao, Andersson & Gillissen 2010, 2013; Capecelatro & Desjardins 2013; Schmeeckle 2014; Guan et al. 2021; Zheng et al. 2021), the quasi-steady drag force is perhaps the most dominant of all the hydrodynamic force contributions (Guan et al.…”

Section: Introductionmentioning

confidence: 99%

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Drag model of finite-sized particle in turbulent wall-bound flow over sediment bed

et al. 2023

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Drag force acting on a particle is vital for the accurate simulation of turbulent multiphase flows, but the robust drag model is still an open issue. Fully resolved direct numerical simulation (DNS) with an immersed boundary method is performed to investigate the drag force on saltating particles in wall turbulence over a sediment bed. Results show that, for saltating particles, the drag force along the particle trajectories cannot be estimated accurately by traditional drag models originally developed for an isolated particle that depends on the particle-wall separation distance or local volume fraction in addition to the particle Reynolds number. The errors between the models and DNS are especially clear during the descending phase of the particles. Through simple theoretical analysis and DNS data fitting, we present a corrected factor using the classical, particle Reynolds number dependent drag force model as the benchmark model. The new drag model, which takes the particle vertical velocity into account, can reasonably predict the mean drag force obtained by DNS along a particle trajectory.

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Section: Introductionmentioning

confidence: 99%

“…2021), the quasi-steady drag force is perhaps the most dominant of all the hydrodynamic force contributions (Guan et al. 2021). The coupling between the particle and fluid also needs to be realized by adding integral or distributed drag force feedback, among others, into the momentum equation (Rouson 1997; Li et al.…”

Section: Introductionmentioning

confidence: 99%