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Planar vortex flow
Start the java web start application.
In this lab one may investigate the
planar vortex flow.
Some suggestions for experiments:
- Random configurations:
-
- press the play button
- press "e",
scale or move the image by dragging with middle or left mouse
to follow the moving vortices
- press the "Reset" button to start with a new configuration
- Specific configurations:
-
- choose the number of vortices by changing the number labled "control points"
and "e" to encompass the image around the vortices
- move vortices by dragging with the right mouse
- select vortices with left mouse click
- use the slider at the bottom to change the vorticity of the
selected vortices
- use the "flip" button to only change the sign of the
vorticity of the select vortices
- use the "zero" button to get some particles with zero vorticity
- Leapfrogging:
-
- choose 4 vortices and scale the whole plane by dragging with the
middle mouse on the background so that the plane is roughly
8 times as large as the distance of the vortices
- move the 4 vortices to the upper right corner (dragging the background
with left mouse)
- select all 4 vertices and change the vorticity (slider at the bottom)
to a positiv value so
that the diameter of the vortices equals their distance
- deselect (left mouse click) the 2 lower right vortices
and press the "flip" button,
so that the 2 upper left vortices have negative vorticity
- press play (here is a small
mpeg (1.6MiB) movie
or
animated gif (2MiB)
)
Lab author: Ulrich Pinkall
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