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Leapfrogging of 2 smoke rings (same speed) at low Reynolds number |
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Computational details
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Short description and remarks
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Visualization
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Short description and remarks
Two smoke rings are driven by given pressure drops from left
to right, while at other times the external forces for
driving the flow are almost in equilibrium. The second "puff"
reaches and almost penetrates the first one which also accelerates
during this game: both chase each other!
The main problem with visualizing this dynamic behaviour is
due to the dominant diffusive terms. While "absolute" quantities
as pressure, streamfunction and velocity plots do not show
the physical movement, only tracing of concentration may
provide some helpful illustration. However, due to the strong
diffusion, we had to rescale the concentration in each step
which explains the "funny colors" and the "funny structure"
of the smoke rings. For this kind of flow simulation,
definitively a particle tracing is the best visualization
tool!!!
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Visualization
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Please send any comments and suggestions to: featflow@featflow.de |