Наукова електронна бібліотека
періодичних видань НАН України
періодичних видань НАН України
Thermal gravity-driven convection of near-critical helium in enclosures
Репозиторій DSpace/Manakin
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Thermal gravity-driven convection of near-critical helium in enclosures
Тема:
3-й Международный семинар по физике низких температур в условиях микрогравитации
Інший ID:
PACS: 05.70.Ln
Посилання:
Thermal gravity-driven convection of near-critical helium in enclosures / V.I. Polezhaev E.B. Soboleva // Физика низких температур. — 2003. — Т. 29, № 6. — С. 648-652. — Бібліогр.: 16 назв. — англ.
Підтримка:
The authors gratefully acknowledge Prof. H. Meyer for providing them with the experimental data on the physical properties of ³He and for the careful correspondence. We also would like to thank Dr. A. Lednev for fruitful discussions. The work received financial support from the Russian Foundation for Basic Research (grant 03-01-00682).
Дата:
2003
Переглядів:
826
Завантажень:
469
Анотація:
The results of numerical simulation of Rayleigh-Benard convection in ³He near the thermodynamic critical point are presented. The mathematical model including the full Navier-Stokes equations with two-scale splitting of the pressure and the van der Waals equation of state is applied. The known experimental data on ³He are used in simulations. On the basis of the calibration laws the "real" Rayleigh and Prandtl numbers are estimated. It is shown that one should agree these "real" criteria of similarity in the model and physical media to approach results of simulations to experiments. The Rayleigh number characterising the convection onset is defined from obtained numerical data. This number is shown to be in a good agreement with known experimental and theoretical values.
