Scrutinizing lattice Boltzmann methods for direct numerical simulations of turbulent channel flows

Gehrke, Martin; Janßen, Christian F.; Rung, Thomas

doi:10.1016/j.compfluid.2017.07.005

Cited by 34 publications

(21 citation statements)

References 41 publications

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“…multi-relaxation-time models [21,22], entropic LB models [23,24], regularized BGK models [25,26], cumulant/cascaded LB models [27,28]. The MRT models were successful in moderately stabilizing the LB method but still remain challenged by high Reynolds numbers [29,30]. In addition, their high number of free parameters have motivated the development of alternative models.…”

Section: Introductionmentioning

confidence: 99%

Hybrid recursive regularized lattice Boltzmann simulation of humid air with application to meteorological flows

et al. 2019

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An extended version of the hybrid recursive regularized Lattice-Boltzmann model which incorporates external force is developed to simulate humid air flows with phase change mechanisms under the Boussinesq approximation. Mass and momentum conservation equations are solved by a regularized lattice Boltzmann approach well suited for high Reynolds number flows, whereas the energy and humidity related equations are solved by a finite volume approach. Two options are investigated to account for cloud formation in atmospheric flow simulations. The first option considers a single conservation equation for total water and an appropriate invariant variable of temperature. In the other approach, liquid and vapor are considered via two separated equations, and phase transition is accounted for via a relaxation procedure. The obtained models are then systematically validated on four well-established benchmark problems including a double diffusive Rayleigh Bénard convection of humid air, 2D and 3D thermal moist rising bubble under convective atmospheric environment as well as a shallow cumulus convection in framework of large-eddy simulation.

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Section: Introductionmentioning

confidence: 99%

Hybrid recursive regularized lattice Boltzmann simulation of humid air with application to meteorological flows

et al. 2019

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“…Gehrke presented a new model for simulations of turbulent channel flows, which is currently part of an international, peer-reviewed journal publication (elbe-2015-12, Table 3, [24]). Similarly, Asmuth very recently implemented and tested a new overset grid approach for LBM methods (elbe-2016-21, Table 3).…”

Section: Students Research Scientific Methodsmentioning

confidence: 99%

“…ELBE supports 1D, 2D and 3D simulations of shallow water flows, single-phase flows, flows with a free surface and fluid-structure interactions. For the bulk flow solution, both conventional single-relaxation-time (SRT) and multiple-relaxation-time (MRT) collision operators and more sophisticated, very low-diffusive Cumulant operators are applied, as elaborately discussed for turbulent channel flows in [24]. Rigid-body motions are modeled with quaternion-based motion solvers or a collision-resolving physics engine, as detailed in [25,26].…”

Section: Lbm Bulk Schemementioning

confidence: 99%

Using an Interactive Lattice Boltzmann Solver in Fluid Mechanics Instruction

Gleßmer

Janßen

2017

Computation

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Abstract:This article gives an overview of the diverse range of teaching applications that can be realized using an interactive lattice Boltzmann simulation tool in fluid mechanics instruction and outreach. In an inquiry-based learning framework, examples are given of learning scenarios that address instruction on scientific results, scientific methods or the scientific process at varying levels of student activity, from consuming to applying to researching. Interactive live demonstrations on portable hardware enable new and innovative teaching concepts for fluid mechanics, also for large audiences and in the early stages of the university education. Moreover, selected examples successfully demonstrate that the integration of high-fidelity CFD methods into fluid mechanics teaching facilitates high-quality student research work within reach of the current state of the art in the respective field of research.

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“…Referring to the seminal paper by Geier et al (2015) such are, among others, the lack of a universal formulation for optimal collisions rates, deficiencies stemming from the rather arbitrary choice of moment space, lacking Galilean invariance and the introduction of hyper-viscosities. Deteriorations of the flow field through local instabilities can be the consequence (Gehrke et al, 2017). To remedy the aforementioned deficiencies Geier et al (2015) suggest a universal formulation based on statistically independent observable quantities of the PDFs, i.e., cumulants.…”

Section: Governing Equationsmentioning

confidence: 99%

“…This unconditionally damps all higher-order perturbations providing an inherently stable solution and thereby an extremely robust numerical framework. Numerous studies have shown that the ALLONE CLBM can be readily applied to high Reynolds number flows (see, Geier et al, 2015;Far et al, 2016;Gehrke et al, 2017;Kutscher et al, 2018;. A further development of the original ALLONE is the parametrised CLBM presented in Geier et al (2017b).…”

Section: Governing Equationsmentioning

confidence: 99%

Actuator Line Simulations of Wind Turbine Wakes Using the Lattice Boltzmann Method

Asmuth¹,

Olivares-Espinosa²,

Ivanell³

2019

Preprint

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Abstract. The presented work investigates the potential of large-eddy simulations (LES) of wind turbine wakes using the cumulant lattice Boltzmann method (CLBM). The wind turbine is represented by the actuator line model (ALM) that is implemented in a GPU-accelerated (Graphics Processing Unit) lattice Boltzmann framework. The implementation is validated and discussed by means of a code-to-code comparison to an established finite-volume Navier-Stokes solver. To this end, the ALM is subjected to a uniform laminar inflow while a standard Smagorinsky sub-grid scale model is employed in both numerical approaches. The comparison shows a good agreement in terms of the blade loads and near-wake characteristics. The main differences are found in the point of laminar-turbulent transition of the wake and the resulting far-wake. In line with other studies these differences can be attributed to the different orders of accuracy of the two methods. In a second part the possibilities of implicit LES with the CLBM are investigated using a limiter applied to the third-order cumulants in the scheme's collision operator. The study shows that the limiter generally ensures numerical stability. Nevertheless, a universal tuning approach for the limiter appears to be required, especially for perturbation-sensitive transition studies. In summary, the range of discussed cases outline the general feasibility of wind turbine simulations using the CLBM. In addition, it highlights the potential of GPU-accelerated LBM implementations to significantly speed up LES in the field of wind energy.

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Scrutinizing lattice Boltzmann methods for direct numerical simulations of turbulent channel flows

Cited by 34 publications

References 41 publications

Hybrid recursive regularized lattice Boltzmann simulation of humid air with application to meteorological flows

Hybrid recursive regularized lattice Boltzmann simulation of humid air with application to meteorological flows

Using an Interactive Lattice Boltzmann Solver in Fluid Mechanics Instruction

Actuator Line Simulations of Wind Turbine Wakes Using the Lattice Boltzmann Method

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