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Finding Curl from a vector field picture

  1. Nov 27, 2012 #1
    1. The problem statement, all variables and given/known data
    I need to analyze these pictures for my homework and find out the curl of the vector field at the point (red) on the picture.


    2. Relevant equations

    http://i1242.photobucket.com/albums/gg525/sjrrkb/ScreenShot2012-11-26at61615PM.png

    3. The attempt at a solution
    basically I can calculate curl and divergence and evaluate them mathematically...but when it comes to analyzing a picture and determining the curl at a given point on a vector field I am totally lost. Any assistance....in the form of answers, places I can go to get help, or just suggestions would be appreciated.
     
  2. jcsd
  3. Nov 27, 2012 #2

    lanedance

    User Avatar
    Homework Helper

    For the k component of curl, imagine a loop in the xy plane around the point in question, now imagine a line integral around the loop, what is the net result? Consider this for each axis and you should get close. You'll need to be careful with convention, to decide on +-.
     
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