"GA202/05/0218" . . "http://www.isvav.cz/projectDetail.do?rowId=GA202/05/0218"^^ . . . "2008-12-16+01:00"^^ . " turbulence" . . "2007-12-31+01:00"^^ . . "Navrhli a vyrobili jsme t\u0159i kryogenn\u00ED aparatury pro experimenty c\u00EDlen\u00E9 na vybran\u00E9 aspekty kryogenn\u00EDho klasick\u00E9ho a kvantov\u00E9ho proud\u011Bn\u00ED, kvantov\u00E9 turbulence a p\u0159echodu k turbulenci, kter\u00E9 vy\u017E\u00EDvaj\u00ED t\u0159\u00ED tekutin - chladn\u00E9ho heliov\u00E9ho plynu, norm\u00E1ln\u00EDho a supr"@cs . . . "26"^^ . . . "26"^^ . "2007-05-02+02:00"^^ . "cryogenic helium" . "Kryogenn\u00ED heliov\u00E1 klasick\u00E1 a kvantov\u00E1 turbulence" . . " superfluidity" . "cryogenic helium; superfluidity; turbulence; quantum turbulence"@en . . "Three cryogenic apparatuses have been designed and built for the use of three forms of cryogenic helium - cold helium gas, normal liquid He I and superfluid He II - as working fluids in experiments on various aspects of developed cryogenic classical and"@en . "Cryogenic helium classical and quantum turbulence"@en . "1"^^ . . "2"^^ . . . . "0"^^ . . "An experimental study is proposed to use 4He as a working fluid for investigation of classical and quantum turbulence, based on complementary cryogenic classical and quantum flows: (i) the thermally driven turbulent flows - classical high Rayleigh numbercryogenic turbulent thermal convection in the cold helium gas in the vicinity of its critical point and in normal liquid He I versus quantum He II turbulence generated in a counterflow channel by a heat pulse and (ii) boundary layer flow due to an axially oscillating body in the helium gas and in liquid He I versus boundary layer flow in He II in the entire available temperature range from the lambda-point down to a zero temperature limit obtained in a 3He-4He dilution refrigerator. With the general theory of turbulence still to be developed, the role of experiment is crucial. Parallel experimental studies of complementary classical and quantum flows emhasizing their similarities and differences represents a novel approach to the problem"@en . . "Navrhujeme vyu\u017Eit\u00ED 4He jako pracovn\u00EDho m\u00E9dia pro soub\u011B\u017En\u00FD experiment\u00E1ln\u00ED v\u00FDzkum klasick\u00E9 a kvantov\u00E9 turbulence, zalo\u017Een\u00FD na vz\u00E1jemn\u011B se dopl\u0148uj\u00EDc\u00EDch klasick\u00FDch a kvantov\u00FDvh proud\u011Bn\u00EDch: (i) tepeln\u011B generovan\u00FDch - klasick\u00E9ho kryogenn\u00EDho konvektivn\u00EDho proud\u011Bn\u00ED o vysok\u00FDch Rayleighov\u00FDch \u010D\u00EDslech v chladn\u00E9m heliov\u00E9m plynu v okol\u00ED kritick\u00E9ho bodu a v norm\u00E1ln\u00EDm kapaln\u00E9m He I v\u016F\u010Di kvantov\u00E9 turbulenci v proudov\u00E9m kan\u00E1lu generovan\u00E9 tepeln\u00FDm pulsem v protiproudu norm\u00E1ln\u00ED a supratekut\u00E9 slo\u017Eky He II a (ii) klasick\u00E9ho proud\u011Bn\u00ED vyvolan\u00E9ho axi\u00E1ln\u00EDmi kmity t\u011Blesa v heliov\u00E9m plynu a He I v\u016F\u010Di analogick\u00E9mu kvantov\u00E9mu proud\u011Bn\u00ED v He II, a to v cel\u00E9m teplotn\u00EDm rozsahu od lambda-bodu a\u017E po limit nulov\u00E9 teploty z\u00EDskan\u00E9 pomoc\u00ED rozpou\u0161t\u011Bc\u00EDho refriger\u00E1toru 3He-4He. Vzhledem k tomu, \u017Ee obecn\u00E1 teorie turbulence neexistuje, je role experimentu nezam\u011Bniteln\u00E1. C\u00EDlen\u00E9 experiment\u00E1ln\u00ED studium dopl\u0148uj\u00EDc\u00EDch se klasick\u00FDch a kvantov\u00FDch proud\u011Bn\u00ED s d\u016Frazem na prohlouben\u00ED znalost\u00ED rozd\u00EDl\u016F a shodn\u00FDch rys\u016F klasick\u00E9 a kvantov\u00E9" . . "2005-01-01+01:00"^^ .