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Streamsurface

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In fluid dynamics a stream surface is a surface across which no flow occurs. A stream surface may be one of two types:

  • A boundary-type stream surface coincides with the impermeable boundary of a physical object other than the fluid itself. The object may be rigid or flexible, and it may be mobile or immobile. Examples include the wall of a fluid-filled channel or pipe, the wall of a rigid buoy drifting in a water body, and the wall of a balloon floating in the atmosphere.
  • An internal stream surface does not coincide with a physical object other than the fluid. Fluid flows on either side of the surface, but does not cross it.

In scientific visualization a stream surface is the 3D generalization of a streamline. It is the union of all streamlines seeded densely on a curve. Like a streamline, a stream surface is used to visualize flows – three-dimensional flows in this case. Specifically, it is "the locus of an infinite set of such curves , rooted at every point along a continuous originating line segment."

References

  1. Hultquist, J. P. M. (1992). Constructing stream surfaces in steady 3D vector fields. IEEE Computer Society Press Los Alamitos, CA, USA. pp. 171–178. ISBN 978-0-8186-2896-2.
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