| Author | Message | ||||||||
     echarala New member Username: echarala Post Number: 1 Registered: 10-2010 |
Dear Robert G. Nelson, Marek Nelson, I am a PhD student and currently my research is concetrated in Classical Field Theory and to be certain in the Skyrme model. Due to the fact my 2nd project is to solve the full non-linear field equations, I would be grateful if you could inform me about the fact whether the FlexPde can solve such hard problems. I want to know that in advance before starting writing a code in Fortran. I brief, starting from the Lagrangian of this model:
one can take the E-L eqs:
where the Lagrange multiplier \lambda is:
Now, denoting by dot the time differentation, the equations of motion can be reformulated as:
where the matrix M and \alpha are (respectively):
This is the main problem and the man who firstly solved that, claimed that he used Dirichlet conditions on a rectangular grid with 102^3 points. Thank in advance for your help. I am looking forward to hearing from you. Sincerely, Stathis. | ||||||||
| jerrybrown11743 Member Username: jerrybrown11743 Post Number: 66 Registered: 03-2004 |
What is the file type? Don't recognize the .unk file extension. | ||||||||
| echarala New member Username: echarala Post Number: 2 Registered: 10-2010 |
Dear Jerry Brown, sorry for the pictures. These are the correct:
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| echarala Junior Member Username: echarala Post Number: 3 Registered: 10-2010 |
Part I:
Part II:
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| echarala Member Username: echarala Post Number: 4 Registered: 10-2010 |
In these 2 parts my problem is illustrated. I don't know why the .png files are automatically converted to .unk files!! As a result, I 've converted them to pdf files. | ||||||||
| mgnelson Moderator Username: mgnelson Post Number: 213 Registered: 07-2007 |
I am not sure why your PNG files were loaded as an attachment with a .unk extension. I do not experience this when I upload a PNG. There must be something about your browser that is confusing the forum software. Also (Jerry), even though the file has a .unk extension, when I save it or click on it, my browser knows it is a PNG... is views and downloads as a PNG. If your browser does not, then you can just rename the file and all should be well. The file is still a PNG uncorrupted by the upload/download. I will try to discover why this is happening and I will manually fix the posts to show the PNG. | ||||||||
| mgnelson Moderator Username: mgnelson Post Number: 214 Registered: 07-2007 |
THIS IS A REPOST TO CORRECT THE DISPLAY OF PNG FILES Original post by user "Echarala" on Oct 18, 2010, 07:48 --------------------------------------- I am a PhD student and currently my research is concetrated in Classical Field Theory and to be certain in the Skyrme model. Due to the fact my 2nd project is to solve the full non-linear field equations, I would be grateful if you could inform me about the fact whether the FlexPde can solve such hard problems. I want to know that in advance before starting writing a code in Fortran. I brief, starting from the Lagrangian of this model:  one can take the E-L eqs:  where the Lagrange multiplier \lambda is:  . Now, denoting by dot the time differentation, the equations of motion can be reformulated as:  where the matrix M and \alpha are (respectively):   . This is the main problem and the man who firstly solved that, claimed that he used Dirichlet conditions on a rectangular grid with 102^3 points. Thank in advance for your help. I am looking forward to hearing from you. Sincerely, Stathis. | ||||||||
| mgnelson Moderator Username: mgnelson Post Number: 215 Registered: 07-2007 |
THIS IS A REPOST TO CORRECT THE DISPLAY OF PNG FILES Original post by user "Echarala" on Oct 18, 2010, 11:16 --------------------------------------- sorry for the pictures. These are the correct:       |
Skyrme Lagrangian