https://github.com/j-jith/foam-random-process-bc

OpenFOAM boundary condition to generate random gusts at a velocity inlet
https://github.com/j-jith/foam-random-process-bc

openfoam

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OpenFOAM boundary condition to generate random gusts at a velocity inlet

• Host: GitHub
• URL: https://github.com/j-jith/foam-random-process-bc
• Owner: j-jith
• Created: 2018-07-12T07:30:51.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2018-11-07T01:28:08.000Z (about 6 years ago)
• Last Synced: 2023-10-19T18:54:04.263Z (about 1 year ago)
• Topics: openfoam
• Language: C++
• Homepage:
• Size: 553 KB
• Stars: 1
• Watchers: 2
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# randomProcessFixedValue

This is an OpenFOAM boundary condition for generating random gusts at a

velocity inlet.

**This is a work in progress. Expect breaking changes.**

## Usage

The random gust is generated using the Spectral Representation Method from a

specified power spectral density (PSD). At the moment, this boundary condition

can generate a horizontal/vertical spatially uniform random gust.

The following parameters are used to specify the gust:

- `gustDir`: a vector representing the direction of the gust

- `scaleFac`: a scaling factor for the amplitude of the gust

- `circFreq`: a list of frequencies at which the PSD is given

- `psd`: a list representing the PSD at each frequency in `circFreq`

## Example

Two example cases are provided in the [run](run/) directory:

- [rectangularCavity](run/rectangularCavity/): A rectangular cavity with a

  velocity inlet

- [rectangularCavityPar](run/rectangularCavityPar): Same rectangular cavity

  modified to run in parallel

Please have a look at the [0/U](run/rectangularCavityPar/0/U) file to

understand how the gust is to be specified.