On the prediction capabilities of two SGS models for large-eddy simulations of turbulent incompressible wall-bounded flows in OpenFOAM

Ramirez-Pastran, Jesus; Duque-Daza, Carlos

doi:10.1080/23311916.2019.1679067

Cited by 4 publications

(5 citation statements)

References 75 publications

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“…We used one of OF’s standard solvers for turbulent incompressible flow, pimpleFoam , for all experiments. This solver allows for turbulence modelling and uses PIMPLE technique for pressure–velocity coupling, a more stable version of the standard PISO method [49] , [50] .…”

Section: Methodsmentioning

confidence: 99%

Analysis of the airflow features and ventilation efficiency of an Ultra-Clean-Air operating theatre by qDNS simulations and experimental validation

Duque-Daza,

Murillo-Rincón,

Espinosa-Moreno

et al. 2024

Building and Environment

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Section: Methodsmentioning

confidence: 99%

Analysis of the airflow features and ventilation efficiency of an Ultra-Clean-Air operating theatre by qDNS simulations and experimental validation

Duque-Daza,

Murillo-Rincón,

Espinosa-Moreno

et al. 2024

Building and Environment

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“…In this case, the carrier phase of the particle-laden flow was simulated using a turbulent LES incompressible solver on an Eulerian grid. The sub-grid scale dynamics was modelled by using the Coherent Structures Sub-Grid-Scale (SGS) model proposed by Kobayashi [38] and validated in Ramirez-Pastran and Duque-Daza [39]. In order to maintain constant fluid mass flow rate conditions in the streamwise direction, a dynamically computed momentum source was prescribed as a volumetric momentum source.…”

Section: Carrier Phasementioning

confidence: 99%

“…The computational model was solved using the set of C++ libraries and solvers of OpenFOAM which allow to obtain numerical solution of systems of partial differential equations through spatial discretization based on the finite volume method (FVM). OpenFOAM (OF) has become one important tool for CFD researchers and practitioners alike, and its use is becoming more widespread in the numerical modelling community (see Ramirez-Pastran and Duque-Daza [39], Weller et al [56], Hrvoje et al [57], Jasak [58], Chen et al [59], Iturrioz et al [60]). Particularly, in line with the scope of this work, an incompressible turbulent flow solver has been selected to simulate the evolution and dynamics of the carrier phase presented in Equations ( 1) and (2) (see Ramirez-Pastran and Duque-Daza [39]).…”

Section: Complementary Details Of the Computational Modelmentioning

confidence: 99%

“…OpenFOAM (OF) has become one important tool for CFD researchers and practitioners alike, and its use is becoming more widespread in the numerical modelling community (see Ramirez-Pastran and Duque-Daza [39], Weller et al [56], Hrvoje et al [57], Jasak [58], Chen et al [59], Iturrioz et al [60]). Particularly, in line with the scope of this work, an incompressible turbulent flow solver has been selected to simulate the evolution and dynamics of the carrier phase presented in Equations ( 1) and (2) (see Ramirez-Pastran and Duque-Daza [39]). This selection was based on the fact that the OF libraries also provide numerical tools for modelling the solid particles in particle-laden incompressible flows, with minimum modifications.…”

Section: Complementary Details Of the Computational Modelmentioning

confidence: 99%

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Influence of Particle Mass Fraction over the Turbulent Behaviour of an Incompressible Particle-Laden Flow

Duque-Daza

Ramirez-Pastran

Laı́n

2021

Fluids

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The presence of spherical solid particles immersed in an incompressible turbulent flow was numerically investigated from the perspective of the particle mass fraction (PMF or ϕm), a measure of the particle-to-fluid mass ratio. Although a number of different changes have been reported to be obtained by the presence of solid particles in incompressible turbulent flows, the present study reports the findings of varying ϕm in the the turbulent behaviour of the flow, including aspects such as: turbulent statistics, skin-friction coefficient, and the general dynamics of a particle-laden flow. For this purpose, a particle-laden turbulent channel flow transporting solid particles at three different friction Reynolds numbers, namely Reτ=180, 365, and 950, with a fixed particle volume fraction of ϕv=10−3, was employed as conceptual flow model and simulated using large eddy simulations. The value adopted for ϕv allowed the use of a two-way coupling approach between the particles and the flow or carrier phase. Three different values of ϕm were explored in this work ϕm≈1,2.96, and 12.4. Assessment of the effect of ϕm was performed by examining changes of mean velocity profiles, velocity fluctuation profiles, and a number of other relevant turbulence statistics. Our results show that attenuation of turbulence activity of the carrier phase is attained, and that such attenuation increases with ϕm at fixed Reynolds numbers and ϕv. For the smallest Reynolds number case considered, flows carrying particles with higher ϕm exhibited lower energy requirements to sustain constant fluid mass flow rate conditions. By examining the flow velocity field, as well as instantaneous velocity components contours, it is shown that the attenuation acts even on the largest scales of the flow dynamics, and not only at the smaller levels. These findings reinforce the concept of a selective stabilising effect induced by the solid particles, particularly enhanced by high values of ϕm, which could eventually be exploited for improvement of energetic efficiency of piping or equivalent particles transport systems.

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“…This choice is made because of the ability of the SGS TKE to evaluate the forces and model the flows in the near walls. The classical Smagorisky model does not allow modelling of the viscous sub-layer of the boundary layer without drastically increasing the number of cells [20]. Thus, ν sgs is written:…”

Section: Large Eddy Simulation Turbulence Modelmentioning

confidence: 99%

3D Numerical Study of the Impact of Macro-Roughnesses on a Tidal Turbine, on Its Performance and Hydrodynamic Wake

Robin

Bennis

Dauvin

2021

JMSE

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Biofouling is an important factor to consider when calculating the energetic efficiency of tidal farms. Despite the fact that biofouling effects have been widely investigated in the past for naval applications, very few studies concern tidal turbines. This paper proposes a numerical approach to assess the impact of biofouling on tidal turbines, which is efficient for testing many configurations. Two turbulence models are tested (RANS k-ω SST and LES Smagorinsky) for the motionless blade case to validate them. Then we chose to use the Smagorinsky model for the case of a complete tidal turbine rotor with realistically fouled blades. The pressure coefficient is strongly affected by the barnacle in the motionless blade case and the power coefficient is slightly degraded in the complete rotor case. Motionless blade cases do not represent the real biofouling behaviour for two reasons. First, sessile species settle in the down flow part of the chord where their impact is less important. Then, the surrounding turbulence provoked by the blades rotation in the rotor case reduces the impact of biofouling. In the wake, biofouling generates small vortexes that propagate into the larger ones, causing them to spread their energy.

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On the prediction capabilities of two SGS models for large-eddy simulations of turbulent incompressible wall-bounded flows in OpenFOAM

Cited by 4 publications

References 75 publications

Analysis of the airflow features and ventilation efficiency of an Ultra-Clean-Air operating theatre by qDNS simulations and experimental validation

Analysis of the airflow features and ventilation efficiency of an Ultra-Clean-Air operating theatre by qDNS simulations and experimental validation

Influence of Particle Mass Fraction over the Turbulent Behaviour of an Incompressible Particle-Laden Flow

3D Numerical Study of the Impact of Macro-Roughnesses on a Tidal Turbine, on Its Performance and Hydrodynamic Wake

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