Transition to Quantum Turbulence and Streamwise Inhomogeneity of Vortex Tangle in Thermal Counterflow
We report preliminary results of the complementary experimental and numerical studies on spatiotemporal tangle development and streamwise vortex line density (VLD) distribution in counterflowing 4 He. The experiment is set up in a long square channel with VLD and local temperature measured in three...
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Veröffentlicht in: | Journal of low temperature physics 2017-06, Vol.187 (5-6), p.531-537 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | We report preliminary results of the complementary experimental and numerical studies on spatiotemporal tangle development and streamwise vortex line density (VLD) distribution in counterflowing
4
He. The experiment is set up in a long square channel with VLD and local temperature measured in three streamwise locations. In the steady state, we observe nearly streamwise-homogeneous VLD. Experimental second-sound data as well as numerical data (vortex filament method in a long planar channel starting with seeding vortices localized in multiple locations) show that the initial build-up pattern of VLD displays complex features depending on the position in the channel, but some tangle properties appear uniform along its length. |
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ISSN: | 0022-2291 1573-7357 |
DOI: | 10.1007/s10909-016-1683-9 |