[Metqeu]

Hello everyone,
I'm trying to simulate focused waves groups in NWTs using this toolbox. I've seen it being used by plenty of researchers who used OF to study these waves. Most of them however did not explain how this library was modified to support modelling of focused waves.
I found a lot of very useful information at the Chalmers website, that allowed me to modify the existing irregular wave class. Now I have a fully working class for generating waves based on New Wave theory, with individual components calculated using first order Stokes theory.
I would love to use second order theory, however the irregular wave class in waves2foam does not support it (I think so at least). I've seen it being used in literature, but no detail was shared with regards to how it was achieved.
Has anyone on this forum dealt with this problem already, or has an idea how to implement it? I would really appreciate any help.
Thanks

[ngj]

Hi Mateusz,

It is correct that it is not implemented in waves2Foam, since second-order summation takes a very long time to execute. This does not mean that it is not possible and I recommend that you start with Sharma and Dean (1981) as reference to second-order effects. Note that there is a phase-focused phase class in waves2Foam, however, the wave spectra were extended to account for the NewWave Theory.

Kind regards

Niels

[AR91]

Originally Posted by ngj

Hi Mateusz,

It is correct that it is not implemented in waves2Foam, since second-order summation takes a very long time to execute. This does not mean that it is not possible and I recommend that you start with Sharma and Dean (1981) as reference to second-order effects. Note that there is a phase-focused phase class in waves2Foam, however, the wave spectra were extended to account for the NewWave Theory.

Kind regards

Niels

Dear Dr. Jacobsen,
Thanks for the amazing waves2Foam tool. I am using OpenFOAM-4.0 along with waves2Foam. I have been trying to incorporate a current into the stokesFirst wave theory. I have made the necessary changes and placed the new .C and .H files in the new folder inside waves2Foam/src/waves2Foam/waveTheories/regular/. Then I modified the Make/files inside waves2Foam/src/waves2Foam to include the new wave theory. I repeated the same steps for the wave properties as well (inside waves2Foam/src/waves2FoamProcessing/preProcessing/setWaveProperties) and modified the corresponding Make/files document too. The compilation runs successfully and I get the object files in the required folders too. However, when I run setWaveParameters, I am met with the following output:

/*---------------------------------------------------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  4.0                                   |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
Build  : 4.0
Exec   : setWaveParameters
Date   : Feb 08 2021
Time   : 17:25:25
Host   : "Ubuntu"
PID    : 1137
Case   : /home/AR91/OpenFOAM/AR91-4.0/run/applications/utilities/waves2Foam/tutorials/waveFoam/wavewithcurrent
nProcs : 1
sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster
allowSystemOperations : Allowing user-supplied system call operations

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time


Reading g

Reading waveProperties



--> FOAM FATAL ERROR: 
Unknown wave property type stokesFirstwCurrentProperties

Valid wave property types are :

16
(
solitaryFirstProperties
stokesSecondProperties
cnoidalFirstProperties
combinedWavesProperties
oceanWave3DProperties
chappelear1962Properties
potentialCurrentProperties
irregularProperties
bichromaticFirstProperties
stokesSecondModulationProperties
streamFunctionProperties
bichromaticSecondProperties
stokesFirstStandingProperties
externalSourceProperties
stokesFirstProperties
stokesFifthProperties
)


    From function setWaveProperties::New(const fvMesh&, const Time&, ...)
    in file preProcessing/setWaveProperties/setWaveProperties.C at line 276.

FOAM exiting

Kindly let me know if you have any advice regarding the mistake I am making. Thank you very much.
Regards,
Arun.

[Lyu666]

Hello, I am also using waves2Foam to simulate focused wave groups. I only found phasefocusing in waveFoamGABC. However, while reading papers, I noticed that waves2Foam can use an iterative method to achieve phase focusing. Is this method available in waves2Foam? Could you share the link to the Chalmers website? Thank you very much!

[ngj]

Hi,

Please read the waves2Foam manual on ResearchGate and/or the code to waves2Foam.

Kind regards

Niels