GENERAL INFORMATION
-------------------

Dataset Title: 

Numerical setups of Lattice Boltzmann very large eddy simulations of a turbulent flow over covered and uncovered cavities

	
Authors: 
    * Hugo Filipe Mourão Bento, www.linkedin.com/in/hugomouraobento, https://orcid.org/0000-0002-6859-7822


DESCRIPTION
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General description of the dataset:  

    * Numerical setups used to simulate different shapes of microphone cavities, when grazed by a turbulent boundary layer.
    * The numerical setups can be opened with Powercase software version 2019-R4 or later, and can be run with PowerFLOW numerical solver. This solver is based on the Lattice Boltzmann Method.
    * The test cases include both covered and uncovered cavities. The cover simulates a wire-mesh cover, which is transparent to acoustic waves. This was modeled as a porous medium.
    * The purpose of the simulations is study cavities used for microphone wind tunnel wall placement.
    * Of interest might be the strategy used to onset turbulence in the upstream boundary layer. This was done making use of a zigzag trip.
    * These simulations provide the basis for the results of the publication: Mourão Bento, Hugo F., et al. "Lattice Boltzmann very large eddy simulations of a turbulent flow over covered and uncovered cavities." Physics of Fluids 34.10 (2022) [1] (see REFERENCES).

Keywords:

aeroacoustics - microphone cavities - numerical setup - PowerFLOW - Lattice Boltzmann Method - turbulent boundary layer
 

Date of article Publication:
Submitted: 20 May 2022 • Accepted: 07 September 2022 • Published Online: 13 October 2022

Date of dataset publication:
June 2025

Funding: 

The research is part of the NWO-TTW THAMES (Towards High-Reynolds Airfoil self-noise MEasurementS) project, with Grant No. 15215.


ACCESS INFORMATION
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Creative Commons License of the dataset:

CC BY 4.0


Dataset DOI:

10.4121/4ff15765-aa29-4faa-9ee3-f43b209b0454



VERSIONING AND PROVENANCE
-------------------------

Last modification date:

This is the first version of the dataset (June 2025).
 


METHODOLOGICAL INFORMATION
--------------------------

Description of data collection methods:

    * The viscous and inertial resistivities of the wire-mesh cover were obtained with a permeability tube setup. This experimental setup is described in [2] (see REFERENCES).
    * Please refer to the associated peer review article [1] (see REFERENCES). 


Methods for processing the data: 

    * The .case files can be opened with Powercase software, version 2019-R4 or later.
    * SIMULIA PowerFLOW numerical solver version 6-2019 was used to run the simulations.
    * The data presented in the paper was processed/extracted with PowerFLOW software: Powerviz and Poweracoustics; and MATLAB R2018b.

        
Instrument- or software- specific information needed to interpret the data:
    * Powerflow software, versions 2019-R4 or later.


FILE OVERVIEW
-------------

The repository contains the following structure:

.
├── README.txt
└── powerflow_setups
    ├── Chamfered_covered_WM_125grid.case
    ├── Conic_Uncov_100grid.case
    ├── Conical_covered_sWM.case
    ├── Cylindrical_covered_WM_125grid.case
    ├── cavity_chamfered_uncovered_125grid.case
    ├── cavity_cylindrical_uncovered_125grid.case
    └── flatplate_125grid.case
 
The directory "powerflow_setups/" contains the numerical setup files for the covered and uncovered simulations of the cylindrical ("Cylindrical_covered_WM_125grid.case" and "cavity_cylindrical_uncovered_125grid.case"), 
chamfered ("Chamfered_covered_WM_125grid.case" and "cavity_chamfered_uncovered_125grid.case") and conical cavities ("Conical_covered_sWM.case" and "Conic_Uncov_100grid.case").

The file "flatplate_125grid.case" refers to the reference simulations of a flatplate, without a cavity geometry. This reference is used for comparison [1] (see REFERENCES).


REFERENCES
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1. Mourão Bento H. F., VanDercreek C. P., Avallone F., Ragni D., Snellen M.; Lattice Boltzmann very large eddy simulations of a turbulent flow over covered and uncovered cavities. Physics of Fluids 1 October 2022; 34 (10): 105120. https://doi.org/10.1063/5.0100001 
2. Carpio A.R., Martinez R.M., Avallone F., Ragni D., Snellen M., van der Zwaag S.; Experimental characterization of the turbulent boundary layer over a porous trailing edge for noise abatement. Journal of Sound and Vibration 443 (2019): 537-558. https://doi.org/10.1016/j.jsv.2018.12.010


CITATION 
--------

When using this dataset please cite:

Mourão Bento H. F., VanDercreek C. P., Avallone F., Ragni D., Snellen M. (2025): Numerical setups of Lattice Boltzmann very large eddy simulations of a turbulent flow over covered and uncovered cavities. Version 1. 4TU.ResearchData. dataset. https://doi.org/10.4121/4ff15765-aa29-4faa-9ee3-f43b209b0454

