Two-phase flow DES and URANS simulations of pump-intake bay vortices

Wu, Pengfei; Munoz, Daniel Horna; Constantinescu, George; Zhou, Qian

doi:10.1080/00221686.2018.1555552

Cited by 15 publications

(2 citation statements)

References 19 publications

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“…The same solver was previously used to conduct unsteady RANS and DES simulations in our group for complex turbulent flows. These studies (e.g., Cheng et al, 2018;Horna-Munoz & Constantinescu, 2018Wu et al, 2020) also include detailed validation with experimental data.…”

Section: Viscous Flow Solver and Turbulence Modelmentioning

confidence: 99%

Flow and Entrainment Mechanisms Around a Freshwater Mussel Aligned With the Incoming Flow

Constantinescu

Zeng

2020

Water Resources Research

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The paper uses information from eddy-resolving simulations to characterize flow and turbulence around freshwater mussels at the organism scale. The focus is on the simplest case of a partially burrowed, isolated mussel aligned with the incoming flow in an open channel. The wake structure and the capacity of the flow to displace the mussel from the bed substrate and to induce local scour around the mussel are investigated as a function of the ratio between the height of the exposed part of the mussel, h, and the total mussel height, d, and as a function of the filtration velocity ratio (VR) between the incoming channel flow velocity, U 0 , and the mean velocity inside the excurrent siphon, U e. As opposed to the flow past most surface-mounted obstacles where the bed shear stresses are reduced in the wake of the body, the capacity of the flow to induce bed erosion behind isolated mussels aligned with the flow is relatively large because of strong downwelling motions inside the horizontal separated shear layers. These flow features are associated with the formation of counterrotating base vortices of unequal coherence that induce upwash behind the mussel. The total circulation of the base vortices increases with increasing h/d and VR. Though both symmetrical and antisymmetrical shedding are observed in the wake, the antisymmetrical mode dominates, and its strength increases with increasing VR. The nondimensional streamwise force acting on the emerged part of the mussel's shell increases with increasing h/d and VR. Finally, the paper discusses the effects of varying h/d and VR on the dynamics and dilution of the jet of filtered water originating in the excurrent siphon, which is important to understand how mussels affect mixing and water quality (e.g., nutrient availability and phytoplankton concentration) in natural streams.

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Section: Viscous Flow Solver and Turbulence Modelmentioning

confidence: 99%

Flow and Entrainment Mechanisms Around a Freshwater Mussel Aligned With the Incoming Flow

Constantinescu

Zeng

2020

Water Resources Research

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“…The solver was parallelized using message passing interface. DES simulations performed using the STAR‐CCM+ solver were shown to accurately predict complex flows containing highly‐unsteady vortices, and steady and unsteady flows in channels containing large‐scale flow obstructions (Horna‐Munoz & Constantinescu, 2018; Lazzarin et al., 2023; P. Wu, Horna‐Munoz, et al., 2020).…”

Section: Test Cases Computational Approach and Model Validationmentioning

confidence: 99%