Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Peter G. J. Lucas"'
Publikováno v:
Journal of Low Temperature Physics. 138:499-504
If superfluid helium-4 is rotated, a triangular array of singly quantised vortices is created. The vortices have core diameters of approximately five angstroms and are pinned at the cell upper and lower boundaries. If the fluid has a free surface, th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b521c2de415ae2949997aa1b52dd5e3a
https://doi.org/10.1007/s10909-005-2241-z
https://doi.org/10.1007/s10909-005-2241-z
Publikováno v:
Journal of Low Temperature Physics. 138:505-511
An apparatus has been constructed to make superfluid counterflow in 4He visible. The counterflow channel is made of glass and has rectangular cross-section of height 0.01 cm, width 2 cm and length 4 cm. One of the 2 cm × 4 cm faces is silvered to al
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a0ce8fc698f7a49c5fa51605a0306151
https://doi.org/10.1007/s10909-005-2243-x
https://doi.org/10.1007/s10909-005-2243-x
Publikováno v:
Journal of Low Temperature Physics. 114:109-134
The advantages of using liquid helium as the investigative fluid in Rayleigh-Benard experiments are reviewed. A low temperature shadowgraphy apparatus is described that permits convective flow pattern visualisation in liquid helium, thus overcoming t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f7f41598179fca98b3efd2075d9fb72
https://doi.org/10.1023/a:1021849819891
https://doi.org/10.1023/a:1021849819891
Autor:
Jayanta K. Bhattacharjee, A. L. Woodcraft, M.R. Ardron, B. J. Brooks, M.S. Thurlow, Peter G. J. Lucas
Publikováno v:
Journal of Fluid Mechanics. 313:381-407
Thermal convection is investigated experimentally in a dilute liquid mixture of 3He in 4He at four temperatures between 20 and 100 mK above the superfluid transition temperature, chosen for their proximity to the codimension-two and hydrodynamic tric
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f42455c08e8765ed5e72462daae68d1
https://doi.org/10.1017/s002211209600225x
https://doi.org/10.1017/s002211209600225x
Publikováno v:
Nonlinearity. 3:981-995
The authors describe convection experiments on two dilute liquid mixtures of 3He in 4He with cylindrical Rayleigh-Benard geometry in the separation ratio range -1.8
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0013a05f8855e370b48a482c3265435d
https://doi.org/10.1088/0951-7715/3/4/002
https://doi.org/10.1088/0951-7715/3/4/002
Publikováno v:
AIP Conference Proceedings.
We present new measurements of the critical Rayleigh number RC for Rayleigh‐Benard convection in 4He over the temperature range 2.2K to 3.1K in a cylindrical cell with aspect ratio Γ=16.6. A study of the convective flow pattern evolution as the Ra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c83f6c027b522c860b1b886bd978c26f
https://doi.org/10.1063/1.2354648
https://doi.org/10.1063/1.2354648
Publikováno v:
Physical Review Letters. 93
We present results of experiments on Rayleigh-Benard convection in liquid 4He at several temperatures. We show visually that with carefully defined boundary conditions the basic convection state consists of parallel rolls which are aligned in one of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::308bed8da4bc0c8a11043d584eb1918b
https://doi.org/10.1103/physrevlett.93.144502
https://doi.org/10.1103/physrevlett.93.144502
Publikováno v:
Physical review letters. 93(14)
We present results of experiments on Rayleigh-Bénard convection in liquid 4He at several temperatures. We show visually that with carefully defined boundary conditions the basic convection state consists of parallel rolls which are aligned in one of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::5475ba2f54b7d7deaaa3edc5c206325d
https://pubmed.ncbi.nlm.nih.gov/15524801
https://pubmed.ncbi.nlm.nih.gov/15524801
Publikováno v:
Flow at Ultra-High Reynolds and Rayleigh Numbers ISBN: 9781461274643
While liquid helium is an ideal fluid for obtaining precise thermal information on mean convective flow in Rayleigh-Benard geometry, flow pattern details have until now only been measurable with room temperature fluids. We show that it is now possibl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::421ed0110cab1e9df6138c205cad28fd
https://doi.org/10.1007/978-1-4612-2230-9_33
https://doi.org/10.1007/978-1-4612-2230-9_33
Publikováno v:
Physica B: Condensed Matter. :220-221
An optical probe based on the technique of shadowgraphy is proposed that would enable visualisation of the surface depressions (dimples) above quantised vortex lines in a sample of rotating superfluid liquid helium. An analysis based on the dimple pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a034542286eed14e8ff348784fbebb9c
https://doi.org/10.1016/s0921-4526(02)01966-x
https://doi.org/10.1016/s0921-4526(02)01966-x