Modeling Turbulence in the Atmospheric Boundary Layer with Spectral Element and Finite Volume Methods
<|reference_start|>Modeling Turbulence in the Atmospheric Boundary Layer with Spectral Element and Finite Volume Methods: We present large-eddy-simulation (LES) modeling approaches for the simulation of atmospheric boundary layer turbulence that are of direct relevance to wind energy production. In this paper, we study a GABLS benchmark problem using high-order spectral element code Nek5000/RS and a block-structured second-order finite-volume code AMR-Wind which are supported under the DOE's Exascale Computing Project (ECP) Center for Efficient Exascale Discretizations (CEED) and ExaWind projects, respectively, targeting application simulations on various acceleration-device based exascale computing platforms. As for Nek5000/RS we demonstrate our newly developed subgrid-scale (SGS) models based on mean-field eddy viscosity (MFEV), high-pass filter (HPF), and Smagorinsky (SMG) with traction boundary conditions. For the traction boundary conditions, a novel analytical approach is presented that solves for the surface friction velocity and surface kinematic temperature flux. For AMR-Wind, standard SMG is used and discussed in detail the traction boundary conditions for convergence. We provide low-order statistics, convergence and turbulent structure analysis. Verification and convergence studies were performed for both codes at various resolutions and it was found that Nek5000/RS demonstrate convergence with resolution for all ABL bulk parameters, including boundary layer and low level jet (LLJ) height. Extensive comparisons are presented with simulation data from the literature.<|reference_end|>
@article{churchfield2024modeling,
    title={Modeling Turbulence in the Atmospheric Boundary Layer with Spectral
  Element and Finite Volume Methods},
    author={Ananias Tomboulides Matthew Churchfield, Paul Fischer, Michael
  Sprague, Misun Min},
    journal={arXiv preprint arXiv:2410.00147},
    year={2024},
    archivePrefix={arXiv},
    eprint={2410.00147},
    primaryClass={cs.CE}
}