[waves2Foam] Questions about the case 'bejiBattjes'

zhyren · April 6, 2014, 11:16

Hi, Ngs,

I am learning about the case in waves2foam, named 'bejiBattjes'. But I am puzzled with the mesh. In the file 'stlDefinitions', there are four points to definite the shape. But I do not know about the meaning of the file 'geometria.stl_backup'. Please give me more details. Thank you very much.

ps, If I have change the points in 'stlDefinitions', the shape also changes.

ngj · April 7, 2014, 14:43

Good evening,

@Zhyren: Please read the Allrun script, as this will tell you the details on the various steps/files.

Kind regards,

Niels

zhyren · April 8, 2014, 10:07

Hi, Niels,
In the simulation results of tutorials case 'bejiBattjes', I can not find the data files in the folder 'surfaceElevation'. Should I change something in Allrun or make other changes? Thanks.

zhiyuan

ngj · April 8, 2014, 15:49

Hi Zhiyuan,

Yes, I can confirm that it is a bug. I am thinking of how to make a general correction, but for know, merely change to field name in the controlDict (the sample part) from alpha1 to alpha.water.

Hopefully, this is the only place, where I have missed a static name of the VOF field.

Kind regards,

Niels

zhyren · April 10, 2014, 08:14

Dear Niels,

I have two questions about this case 'bejiBattjes',
1. I do not use the matlab code and directly compare them with other software. I have found that in the matlab code, a time shift 1.49s need to be applied to the simulation results. Could you explain why? Do I have to do this time shift to all the other cases?

2. The simulation results do not match well with the experiment data. However, I have found that in the master paper 'Development of a numerical wave tank using OpenFOAM', the grid size 0.02 by 0.01 is enough. And his results are better than this case. So, do you have some suggestions?

Best regards,
Zhiyuan

April 6, 2014, 11:16	Questions about the case 'bejiBattjes'	#1
zhyren New Member Join Date: Mar 2014 Posts: 8 Rep Power: 12	Hi, Ngs, I am learning about the case in waves2foam, named 'bejiBattjes'. But I am puzzled with the mesh. In the file 'stlDefinitions', there are four points to definite the shape. But I do not know about the meaning of the file 'geometria.stl_backup'. Please give me more details. Thank you very much. ps, If I have change the points in 'stlDefinitions', the shape also changes. Last edited by zhyren; April 6, 2014 at 11:38. Reason: more information

April 7, 2014, 14:43		#2
ngj Senior Member Niels Gjoel Jacobsen Join Date: Mar 2009 Location: Copenhagen, Denmark Posts: 1,903 Rep Power: 37	Good evening, @Zhyren: Please read the Allrun script, as this will tell you the details on the various steps/files. Kind regards, Niels __________________ Please note that I do not use the Friend-feature, so do not be offended, if I do not accept a request. Last edited by wyldckat; November 4, 2018 at 14:47. Reason: removed answer to another post that was on the main thread

April 8, 2014, 10:07	Questions about the case 'bejiBattjes'	#3
zhyren New Member Join Date: Mar 2014 Posts: 8 Rep Power: 12	Hi, Niels, In the simulation results of tutorials case 'bejiBattjes', I can not find the data files in the folder 'surfaceElevation'. Should I change something in Allrun or make other changes? Thanks. zhiyuan

April 8, 2014, 15:49		#4
ngj Senior Member Niels Gjoel Jacobsen Join Date: Mar 2009 Location: Copenhagen, Denmark Posts: 1,903 Rep Power: 37	Hi Zhiyuan, Yes, I can confirm that it is a bug. I am thinking of how to make a general correction, but for know, merely change to field name in the controlDict (the sample part) from alpha1 to alpha.water. Hopefully, this is the only place, where I have missed a static name of the VOF field. Kind regards, Niels __________________ Please note that I do not use the Friend-feature, so do not be offended, if I do not accept a request.

April 10, 2014, 08:14	Two questions about 'bejiBattjes'	#5
zhyren New Member Join Date: Mar 2014 Posts: 8 Rep Power: 12	Dear Niels, I have two questions about this case 'bejiBattjes', 1. I do not use the matlab code and directly compare them with other software. I have found that in the matlab code, a time shift 1.49s need to be applied to the simulation results. Could you explain why? Do I have to do this time shift to all the other cases? 2. The simulation results do not match well with the experiment data. However, I have found that in the master paper 'Development of a numerical wave tank using OpenFOAM', the grid size 0.02 by 0.01 is enough. And his results are better than this case. So, do you have some suggestions? Best regards, Zhiyuan

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