"151211" . . "Simulation of flow and dissipation of turbulent kinetic energy in an agitated vessel"@en . "8"^^ . "agitated vessel; six-pitch blade impeller; dissipation rate; CFD; LDV/LDA"@en . "Ch\u00E1ra, Zden\u011Bk" . "\u0160pindler\u016Fv Ml\u00FDn" . . . "RIV/67985874:_____/12:00380211" . "Rychlostn\u00ED pole a distribuce disipace energie jsou kl\u00ED\u010Dov\u00E9 parametry p\u0159i navrhov\u00E1n\u00ED m\u00EDchan\u00FDch reaktor\u016F. V tomto p\u0159\u00EDsp\u011Bvku jsme porovn\u00E1vali v\u00FDsledky CFD v\u00FDpo\u010Dt\u016F s v\u00FDsledky st\u0159edn\u00EDch rychlost\u00ED nam\u011B\u0159en\u00FDch pomoc\u00ED LDA (Laser Doppler Anemometry) a s v\u00FDsledky odvozen\u00FDch disipac\u00ED energie, kde byla celkov\u00E1 st\u0159edn\u00ED disipace energie pou\u017Eita jako kontroln\u00ED hodnota. Porovn\u00E1n\u00ED ukazuje, \u017Ee ani k-\u03B5 model (zalo\u017Een\u00FD na isotropn\u00ED turbulenci) ani RSM nepo\u010D\u00EDtaj\u00ED zcela spr\u00E1vn\u011B hodnoty rychlost\u00ED v oblastech, kde se vyskytuj\u00ED vle\u010Den\u00E9 v\u00EDry (v bl\u00EDzkosti hran lopatek m\u00EDchadla, atd.) a v oblasti hlavn\u00EDho proudu z m\u00EDchadla, kde je tok siln\u011B neizotropn\u00ED. Podobn\u00E9 odchylky se objevuj\u00ED i v hodnot\u00E1ch disipace energie. N\u00EDzk\u00E9 hodnoty disipace energie jsou tak\u00E9 vypo\u010D\u00EDt\u00E1ny i v oblasti objemu mimo oblast m\u00EDchadla. B\u011B\u017En\u011B vych\u00E1z\u00ED z CFD v\u00FDpo\u010Dt\u016F ni\u017E\u0161\u00ED hodnoty celkov\u00E9 disipace, ne\u017E jsou re\u00E1ln\u00E9 hodnoty, co\u017E je ve shod\u011B s ostatn\u00EDmi publikovan\u00FDmi v\u00FDsledky."@cs . "3"^^ . . "Kysela, Bohu\u0161" . . . "2012-09-05+02:00"^^ . . "Modelov\u00E1n\u00ED proud\u011Bn\u00ED a disipace turbulentn\u00ED kinetick\u00E9 energie v m\u00EDchan\u00E9 n\u00E1dob\u011B" . . "RIV/67985874:_____/12:00380211!RIV13-AV0-67985874" . . . "Modelov\u00E1n\u00ED proud\u011Bn\u00ED a disipace turbulentn\u00ED kinetick\u00E9 energie v m\u00EDchan\u00E9 n\u00E1dob\u011B"@cs . "I, P(GAP101/12/2274)" . . . "Sko\u010Dilas, J." . "TechSoft Engineering s.r.o" . . . "Simulation of flow and dissipation of turbulent kinetic energy in an agitated vessel"@en . "Modelov\u00E1n\u00ED proud\u011Bn\u00ED a disipace turbulentn\u00ED kinetick\u00E9 energie v m\u00EDchan\u00E9 n\u00E1dob\u011B" . "Konfr\u0161t, Ji\u0159\u00ED" . . "Velocity field and distribution of dissipation rate are key parameters for design of mixing apparatuses. In this contribution we compared the CFD (Computational Fluid Dynamics) calculations with results of mean ensemble-averaged velocities measured by LDA (Laser Doppler Anemometry) and with results of derived dissipation rates where the total dissipation rate was used as control value. The comparison showed that the neither k-\u03B5 model (based on isotropic turbulence) nor RSM (Reynolds Stress Model) did not calculate the velocities in regions where the trailing vortices are developed (near impeller blade edges etc.) and in a region of main stream of the impeller where the flow is strongly anisotropic quite accurately. Similar discrepancies were observed for the dissipation rate; moreover the lower values of dissipation rate are also calculated in bulk volume of mixing vessel. Generally, the total dissipation rate results from the CFD calculations are lower then the real values. This is in an agreement with other published results."@en . . . "Rychlostn\u00ED pole a distribuce disipace energie jsou kl\u00ED\u010Dov\u00E9 parametry p\u0159i navrhov\u00E1n\u00ED m\u00EDchan\u00FDch reaktor\u016F. V tomto p\u0159\u00EDsp\u011Bvku jsme porovn\u00E1vali v\u00FDsledky CFD v\u00FDpo\u010Dt\u016F s v\u00FDsledky st\u0159edn\u00EDch rychlost\u00ED nam\u011B\u0159en\u00FDch pomoc\u00ED LDA (Laser Doppler Anemometry) a s v\u00FDsledky odvozen\u00FDch disipac\u00ED energie, kde byla celkov\u00E1 st\u0159edn\u00ED disipace energie pou\u017Eita jako kontroln\u00ED hodnota. Porovn\u00E1n\u00ED ukazuje, \u017Ee ani k-\u03B5 model (zalo\u017Een\u00FD na isotropn\u00ED turbulenci) ani RSM nepo\u010D\u00EDtaj\u00ED zcela spr\u00E1vn\u011B hodnoty rychlost\u00ED v oblastech, kde se vyskytuj\u00ED vle\u010Den\u00E9 v\u00EDry (v bl\u00EDzkosti hran lopatek m\u00EDchadla, atd.) a v oblasti hlavn\u00EDho proudu z m\u00EDchadla, kde je tok siln\u011B neizotropn\u00ED. Podobn\u00E9 odchylky se objevuj\u00ED i v hodnot\u00E1ch disipace energie. N\u00EDzk\u00E9 hodnoty disipace energie jsou tak\u00E9 vypo\u010D\u00EDt\u00E1ny i v oblasti objemu mimo oblast m\u00EDchadla. B\u011B\u017En\u011B vych\u00E1z\u00ED z CFD v\u00FDpo\u010Dt\u016F ni\u017E\u0161\u00ED hodnoty celkov\u00E9 disipace, ne\u017E jsou re\u00E1ln\u00E9 hodnoty, co\u017E je ve shod\u011B s ostatn\u00EDmi publikovan\u00FDmi v\u00FDsledky." . "[E143797B9163]" . "Praha" . "978-80-905040-1-1" . "TechSoft Engineering ANSYS 2012 setk\u00E1n\u00ED u\u017Eivatel\u016F a konference. Sborn\u00EDk" . "Modelov\u00E1n\u00ED proud\u011Bn\u00ED a disipace turbulentn\u00ED kinetick\u00E9 energie v m\u00EDchan\u00E9 n\u00E1dob\u011B"@cs . . . . . . "4"^^ .