This documentation file was generated on 2021-05-06 by Pere Valls Badia



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

1. Title of Dataset: Implementation and Validation of the Ffowcs-Williams and Hawkings equation in OpenFOAM [Dataset]


2. Authorship: 



	Name: Pere Valls Badia
	Institution: Barcelona Technical Center (Btechc)
	Email: pvalls@btechc.com 
	ORCID: https://orcid.org/0000-0002-3682-447X

	Name: Robert Castilla Lopez
	Institution: UPC-ESEIAAT
	Email: robert.castilla@upc.edu
	ORCID: https://orcid.org/0000-0002-3848-2004

	Name: Andreu Balastegui Manso
	Institution: UPC-ESEIAAT
	Email: andreu.balastegui@upc.edu
	ORCID: https://orcid.org/0000-0003-4516-5469




DESCRIPTION
-----------

1. Dataset language: English


2. Abstract:

This  dataset includes the results of the aeroacoustics field of a tandem cylinder calculated using Curle's and F-WH analogy with OpenFOAM. The sound levels are measured as Power Spectral Density (PSD). The temporal acoustic pressure data is also included.


3. Keywords:

Computational Fluid Dynamics (CFD)  
Lighthill's Analogy
Curle's Analogy
F-WH analogy
Computational Aeroacoustics
OpenFOAM


4. Date of data collection (single date or date range):
2021-05-06

5. Date of dataset publication:
2021-05-06


6. Funding sources: 

	Funding agency: Ministerio de Ciencia e Innovaci—n CDTI
	Project number: IDI-20191166




ACCESS INFORMATION
------------------

1. Creative Commons License of the dataset:

Attribution 4.0 International (CC BY 4.0) license


2. Dataset DOI:

DOI 10.5821/data-2117-345253-1


3. Related publication:



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

1. Last modification date:
2021-05-06


2. Was data derived from another source?:
No



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

F-WH analogy and Curle analogy have been implemented in a new solver of the CFD Open Source OpenFOAM. This solver has been used to solve the aeroacoustics field of a tandem cylinder. The resultant acoustic field is measured using a virtual microphone and the sample acoustic pressure is postProcessed to obtain the PSD spectrum for both Curle's and F-WH analogies.

1. Description of methods used for collection-generation of data: 
Probe feature included in OpenFOAM is used as microphone sampler.


2. Methods for processing the data: 
The collected data is transformed using the noise utility already included in OpenFOAM. It allows the user to calculate the PSD of an array of acoustic pressure values over a given period of time.


3. Instrument- or software- specific information needed to interpret the data:
No software is needed to interpret the data. The dataset can be seen using any text editor.




FILE OVERVIEW
--------------
[All files in the dataset should be listed here. Filenames should include the extension (.csv, .pdf, etc.)]


2. File List:

	Filename: pa_curle.xy
	Short description: Temporal data of the acoustic pressure calculated using Curle's analogy. The file contains two columns. The first on is the sample time in seconds and the second one is the acoustic pressure value.

	Filename: pa_fwh.xy
	Short description: Temporal data of the acoustic pressure calculated using F-WH analogy. The file contains two columns. The first on is the sample time in seconds and the second one is the acoustic pressure value.

	Filename: PSD_dB_Hz_f_curle.xy
	Short description: PSD of the sampled acoustic pressure calculated with Curle's analogy. The file contains two columns. The first on is the frequency in Hertz and the second one is the PSD.

	Filename: PSD_dB_Hz_f_fwh.xy
	Short description: PSD of the sampled acoustic pressure calculated with F-WH analogy. The file contains two columns. The first on is the frequency in Hertz and the second one is the PSD.



4. File format:

The file format is .xy. Therefore, all the files can be opened using a any text editor.



TABULAR DATA-SPECIFIC INFORMATION
---------------------------------



1. File name: pa_curle.xy


2. Number of rows and columns: 100000 rows / 2 colums


3. Variable list:

	Variable name: Time
        Description: sampling time
	Measurement units or value labels: seconds

	Variable name: pa
        Description: acoustic pressure calculated using Curle's analogy.
	Measurement units or value labels: Pa



        
5. Specialized formats or abbreviations used:





1. File name: pa_fwh.xy


2. Number of rows and columns: 100000 rows / 2 colums


3. Variable list:

	Variable name: Time
        Description: sampling time
	Measurement units or value labels: seconds

	Variable name: pa
        Description: acoustic pressure calculated using F-WH's analogy.
	Measurement units or value labels: Pa





1. File name: PSD_dB_Hz_f_curle.xy


2. Number of rows and columns: 3260 rows / 2 colums


3. Variable list:

	Variable name: Frequency
        Description: Spectrum frequency
	Measurement units or value labels: hertz

	Variable name: PSD
        Description: Power spectral density 
	Measurement units or value labels: dB/Hz





1. File name: PSD_dB_Hz_f_fwh.xy


2. Number of rows and columns: 3260 rows / 2 colums


3. Variable list:

	Variable name: Frequency
        Description: Spectrum frequency
	Measurement units or value labels: hertz

	Variable name: PSD
        Description: Power spectral density 
	Measurement units or value labels: dB/Hz