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Helium cryostat for experimental study of natural turbulent convection
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SYSNO ASEP 0350813 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Helium cryostat for experimental study of natural turbulent convection Author(s) Urban, Pavel (UPT-D) RID, ORCID, SAI
Hanzelka, Pavel (UPT-D) RID, ORCID, SAI
Králík, Tomáš (UPT-D) RID, ORCID, SAI
Musilová, Věra (UPT-D) RID, SAI, ORCID
Skrbek, L. (CZ)
Srnka, Aleš (UPT-D) RID, ORCID, SAINumber of authors 6 Source Title Review of Scientific Instruments. - : AIP Publishing - ISSN 0034-6748
Roč. 81, č. 8 (2010), 085103 :1-5Number of pages 5 s. Language eng - English Country US - United States Keywords Rayleigh-Benard convection ; ultimate regime Subject RIV BK - Fluid Dynamics R&D Projects KJB200650902 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) ED0017/01/01 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z20650511 - UPT-D (2005-2011) UT WOS 000281906100030 EID SCOPUS 77956331780 DOI 10.1063/1.3469788 Annotation ublished experiments on natural turbulent convection in cryogenic He-4 gas show contradictory results in the values of Rayleigh number (Ra) higher than 10(11). This paper describes a new helium cryostat with a cylindrical cell designed for the study of the dependence of the Nusselt number (Nu) on the Rayleigh number (up to Ra approximate to 10(15)) in order to help resolve the existing controversy among published experimental results. The main part of the cryostat is a cylindrical convection cell of 300 mm in diameter and up to 300 mm in height. The cell is designed for measurement of heat transfer by natural convection at pressures ranging from 100 Pa to 250 kPa and at temperatures between 4.2 and 12 K. Parasitic heat fluxes into the convection medium are minimized by using thin sidewalls of the bottom and top parts of the cell. The exchangeable central part of the cell enables one to modify the cell geometry. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2011
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