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gtspring2009:2dturbulence [2009/03/26 11:23]
paprocki
gtspring2009:2dturbulence [2009/06/24 11:49]
clesesne
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 ====== The experiment ====== ====== The experiment ======
 +The following are recurrence plots for runs with DC current at 3V, 6V, 9V, 12V and 15V respectively:​
 +
 +{{:​gtspring2009:​recplot_3v.jpg|}} ​ {{:​gtspring2009:​recplot_6v.jpg|}} ​ {{:​gtspring2009:​recplot_9v.jpg|}} ​
 +{{:​gtspring2009:​recplot_12v.jpg|}} ​ {{:​gtspring2009:​recplot_15v.jpg|}}
 +
 +The following videos correspond to the above plots: ​
 +
 +3V: [[http://​www.youtube.com/​watch?​v=HRbT2zgkMkg]]
 +6V: [[http://​www.youtube.com/​watch?​v=BtSvv9C9HJI&​feature=channel_page]] ​
 +9V: [[http://​www.youtube.com/​watch?​v=44kXAITPM1A&​feature=channel]] ​
 +12V: [[http://​www.youtube.com/​watch?​v=s2VSBRYrpIU&​feature=channel]] ​
 +15V: [[http://​www.youtube.com/​watch?​v=SanCC1bl6hY&​feature=channel]]
 +
 +
  
 {{:​gtspring2009:​paprocki1.jpg?​24}} Here's a description of the experiment, currently in progress: {{:​gtspring2009:​paprocki1.jpg?​24}} Here's a description of the experiment, currently in progress:
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 You can see a very clear jump from vaguely semi-periodic to completely periodic motion between .25 and .5 Hz.  .0625, .125, and .25 Hz all appear to be just plain turbulent to the naked eye, but the recurrence data suggests otherwise. You can see a very clear jump from vaguely semi-periodic to completely periodic motion between .25 and .5 Hz.  .0625, .125, and .25 Hz all appear to be just plain turbulent to the naked eye, but the recurrence data suggests otherwise.
  
-Also, I'm giving a talk on this project for the undergrad research symposium on April 1st in room 320 of the student center at 1:40 PM, if you're interested in something more detailed than this ramshackle blog that is still lacking a description of what's going on (maybe I'll get to that today, too!).+Also, I'm giving a talk on this project for the undergrad research symposium on April 1st in room 320 of the student center at 1:40 PM, if you're interested in something more detailed than this ramshackle blog.
  
 EDIT: movies of these posted above in movies section EDIT: movies of these posted above in movies section
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 --pivDifArray.m -> takes in a correlation.mat file and outputs a difArray.mat that essentially is just converting the structure array of correlation.mat into a more usable array containing only the velocity data.  This makes it easier to use vectorized code.  This isn't the original use of the function so it isn't very aptly named...\\ ​ --pivDifArray.m -> takes in a correlation.mat file and outputs a difArray.mat that essentially is just converting the structure array of correlation.mat into a more usable array containing only the velocity data.  This makes it easier to use vectorized code.  This isn't the original use of the function so it isn't very aptly named...\\ ​
 ---pivRecurrencePlot.m -> takes in a difArray.mat file and outputs a recurrencePlot.mat file containing recurrence data.\\ ​ ---pivRecurrencePlot.m -> takes in a difArray.mat file and outputs a recurrencePlot.mat file containing recurrence data.\\ ​
 +---PivRecurrencePlotNew.m -> uses the new formula for recurrence plots (doesn'​t square the difference vectors); outputs a recurrencePlotNew.mat file.\\
 +----piv1DRecSlicet.m -> grabs a "​slice"​ of the recurrence plot at a given time along the t axis and plots it.\\
 +----piv1DRecSliceTT.m -> grabs a slice of the recurrence plot at a given time along the T axis and plots it.\\
 +----minFinderY.m -> "​filters"​ out a recurrence plot by blotting out all the points that aren't minima along the Y axis, to some sensitivity.\\
 +----minFinderX.m -> same as minFinderY, but along the X axis.\\
 ---pivRecurrencePlotOne.m -> same as pivRecurrence,​ but only does it for one specified point and ouputs a recurrenceDataLoc###​.mat file\\ ​ ---pivRecurrencePlotOne.m -> same as pivRecurrence,​ but only does it for one specified point and ouputs a recurrenceDataLoc###​.mat file\\ ​
 ----pivRecurrenceImage.m -> takes in a recurrencePlot.mat or recurrenceDataLoc###​.mat file and outputs an image of it.\\  ----pivRecurrenceImage.m -> takes in a recurrencePlot.mat or recurrenceDataLoc###​.mat file and outputs an image of it.\\ 
gtspring2009/2dturbulence.txt ยท Last modified: 2010/02/02 07:55 (external edit)