"Jirout, Tom\u00E1\u0161" . "978-80-02-02500-9" . . "\u010Cesk\u00E1 spole\u010Dnost chemick\u00E9ho in\u017Een\u00FDrstv\u00ED" . . "[1D9B39F64B1C]" . "Tato pr\u00E1ce se zab\u00FDv\u00E1 numerickou simulac\u00ED proud\u011Bn\u00ED kapaliny (pro modelov\u00FD p\u0159\u00EDpad byla pou\u017Eita voda) v n\u00E1dob\u011B bez nar\u00E1\u017Eek se zam\u011B\u0159en\u00EDm na vytvo\u0159en\u00ED v\u00EDru a jeho tvaru na voln\u00E9 hladin\u011B. N\u00E1doba je m\u00EDch\u00E1na t\u0159\u00EDlopatkov\u00FDm m\u00EDchadlem vlastn\u00ED geometrie se zak\u0159iven\u00FDmi lopatkami. Pro simulaci je pou\u017Eit CFD program ANSYS FLUENT. Uva\u017Euje se ust\u00E1len\u00FD re\u017Eim proud\u011Bn\u00ED. Pro v\u00FDpo\u010Det je pou\u017Eit model turbulence SST k-omega a pro simulaci pohybu m\u00EDchadla p\u0159\u00EDstup MRF. Pro \u0159e\u0161en\u00ED v\u00EDcef\u00E1zov\u00E9ho proud\u011Bn\u00ED je pou\u017Eit model VOF. Je \u0159e\u0161ena jedna geometrie m\u00EDchan\u00E9 n\u00E1doby bez nar\u00E1\u017Eek, pro kterou je provedena citlivostn\u00ED anal\u00FDza na jemnost s\u00EDt\u011B. Pro \u0159e\u0161en\u00ED jsou pou\u017Eity vy\u0161\u0161\u00ED ot\u00E1\u010Dky 200, 250 a 300 min-1, tak aby byl vytvo\u0159en st\u0159edov\u00FD v\u00EDr. Porovn\u00E1ny jsou tvary v\u00EDr\u016F pro r\u016Fzn\u011B hrub\u00E9 s\u00EDt\u011B a zp\u016Fsob proud\u011Bn\u00ED. D\u00E1le jsou porovn\u00E1ny velikosti p\u0159\u00EDkonov\u00FDch \u010D\u00EDsel a hloubky v\u00EDr\u016F. Z v\u00FDsledk\u016F vyplynulo, \u017Ee v\u00FDsledn\u00E9 tvary v\u00EDr\u016F a zp\u016Fsob proud\u011Bn\u00ED se s hrubost\u00ED pou\u017Eit\u00FDch s\u00EDt\u00ED p\u0159\u00EDli\u0161 nem\u011Bn\u00ED. Tak\u00E9 p\u0159\u00EDkonov\u00E1 \u010D\u00EDsla jsou t\u00E9m\u011B\u0159 shodn\u00E1. Hrubost s\u00EDt\u011B m\u00E1 ale vliv na ostrost rozmez\u00ED f\u00E1z\u00ED, proto je vhodn\u00E9 v m\u00EDst\u011B p\u0159edpokl\u00E1dan\u00E9ho rozmez\u00ED pou\u017E\u00EDt jemn\u011Bj\u0161\u00ED s\u00ED\u0165. Tvary v\u00EDr\u016F pro jednotliv\u00E9 hrubosti s\u00EDt\u011B jsou velmi podobn\u00E9, av\u0161ak neshoduj\u00ED se s o\u010Dek\u00E1van\u00FDm tvarem, maj\u00ED p\u0159\u00EDli\u0161 ku\u017Eelov\u00FD tvar. Proto je nutn\u00E9 z\u00EDskan\u00E9 v\u00FDsledky ov\u011B\u0159it s experimentem, kter\u00FD je geometricky shodn\u00FD s modelem." . "This work deals with the numerical simulation of fluid flow (for tested case was applied water) in the vessel without baffles focusing on the creation of the vortex and its shape on the free surface. The vessel is stirred by impeller with three curved blades wit own geometry. CFD program ANSYS FLUENT is used for the simulations. Steady flow regime is assumed. SST k- omega turbulence model is used for the simulation of turbulence and MRF approach is used for simulation of impeller motion. VOF model is used to solve multiphase flow. One geometry of stirred vessel without baffles is solved for which the sensitivity analyses of mesh roughness were done. A higher rotation speeds of 200 , 250 and 300 min -1 are set, so that a large central vortex is created. The shapes of vortices and flow fields are compared for different meshes. Furthermore, the size of power numbers and depth of vortices are compared. The results showed that the resulting shapes of vortices and flow fields don't change much with mesh roughness. Also power numbers are almost identical. Mesh roughness has the effect on the sharpness of the interface between phases, therefore it is appropriate to use finer mesh where place of the interface is expected. Shapes of vortices are very similar for each used mesh roughness, but they don't correspond with the expected shape. They are too conical. Therefore it is necessary to verify the obtained results with the experiment, which is geometrically consistent with the model."@en . . . . "CFD simulace tvorby v\u00EDru na voln\u00E9 hladin\u011B v n\u00E1dob\u011B bez nar\u00E1\u017Eek m\u00EDchan\u00E9 t\u0159\u00EDlopatkov\u00FDm m\u00EDchadlem se zak\u0159iven\u00FDmi lopatkami"@cs . "CFD simulation of vortex formation at the free surface in the vessel without baffles stirred by impeller with three curved blades"@en . . . . "Tato pr\u00E1ce se zab\u00FDv\u00E1 numerickou simulac\u00ED proud\u011Bn\u00ED kapaliny (pro modelov\u00FD p\u0159\u00EDpad byla pou\u017Eita voda) v n\u00E1dob\u011B bez nar\u00E1\u017Eek se zam\u011B\u0159en\u00EDm na vytvo\u0159en\u00ED v\u00EDru a jeho tvaru na voln\u00E9 hladin\u011B. N\u00E1doba je m\u00EDch\u00E1na t\u0159\u00EDlopatkov\u00FDm m\u00EDchadlem vlastn\u00ED geometrie se zak\u0159iven\u00FDmi lopatkami. Pro simulaci je pou\u017Eit CFD program ANSYS FLUENT. Uva\u017Euje se ust\u00E1len\u00FD re\u017Eim proud\u011Bn\u00ED. Pro v\u00FDpo\u010Det je pou\u017Eit model turbulence SST k-omega a pro simulaci pohybu m\u00EDchadla p\u0159\u00EDstup MRF. Pro \u0159e\u0161en\u00ED v\u00EDcef\u00E1zov\u00E9ho proud\u011Bn\u00ED je pou\u017Eit model VOF. Je \u0159e\u0161ena jedna geometrie m\u00EDchan\u00E9 n\u00E1doby bez nar\u00E1\u017Eek, pro kterou je provedena citlivostn\u00ED anal\u00FDza na jemnost s\u00EDt\u011B. Pro \u0159e\u0161en\u00ED jsou pou\u017Eity vy\u0161\u0161\u00ED ot\u00E1\u010Dky 200, 250 a 300 min-1, tak aby byl vytvo\u0159en st\u0159edov\u00FD v\u00EDr. Porovn\u00E1ny jsou tvary v\u00EDr\u016F pro r\u016Fzn\u011B hrub\u00E9 s\u00EDt\u011B a zp\u016Fsob proud\u011Bn\u00ED. D\u00E1le jsou porovn\u00E1ny velikosti p\u0159\u00EDkonov\u00FDch \u010D\u00EDsel a hloubky v\u00EDr\u016F. Z v\u00FDsledk\u016F vyplynulo, \u017Ee v\u00FDsledn\u00E9 tvary v\u00EDr\u016F a zp\u016Fsob proud\u011Bn\u00ED se s hrubost\u00ED pou\u017Eit\u00FDch s\u00EDt\u00ED p\u0159\u00EDli\u0161 nem\u011Bn\u00ED. Tak\u00E9 p\u0159\u00EDkonov\u00E1 \u010D\u00EDsla jsou t\u00E9m\u011B\u0159 shodn\u00E1. Hrubost s\u00EDt\u011B m\u00E1 ale vliv na ostrost rozmez\u00ED f\u00E1z\u00ED, proto je vhodn\u00E9 v m\u00EDst\u011B p\u0159edpokl\u00E1dan\u00E9ho rozmez\u00ED pou\u017E\u00EDt jemn\u011Bj\u0161\u00ED s\u00ED\u0165. Tvary v\u00EDr\u016F pro jednotliv\u00E9 hrubosti s\u00EDt\u011B jsou velmi podobn\u00E9, av\u0161ak neshoduj\u00ED se s o\u010Dek\u00E1van\u00FDm tvarem, maj\u00ED p\u0159\u00EDli\u0161 ku\u017Eelov\u00FD tvar. Proto je nutn\u00E9 z\u00EDskan\u00E9 v\u00FDsledky ov\u011B\u0159it s experimentem, kter\u00FD je geometricky shodn\u00FD s modelem."@cs . "CFD simulace tvorby v\u00EDru na voln\u00E9 hladin\u011B v n\u00E1dob\u011B bez nar\u00E1\u017Eek m\u00EDchan\u00E9 t\u0159\u00EDlopatkov\u00FDm m\u00EDchadlem se zak\u0159iven\u00FDmi lopatkami" . "Sko\u010Dilas, Jan" . . . . "I, S" . "CFD simulation of vortex formation at the free surface in the vessel without baffles stirred by impeller with three curved blades"@en . "Srn\u00ED" . "21220" . "CFD simulace tvorby v\u00EDru na voln\u00E9 hladin\u011B v n\u00E1dob\u011B bez nar\u00E1\u017Eek m\u00EDchan\u00E9 t\u0159\u00EDlopatkov\u00FDm m\u00EDchadlem se zak\u0159iven\u00FDmi lopatkami"@cs . . . "Sborn\u00EDk konference CHISA 2013" . . . "3"^^ . "CFD simulace tvorby v\u00EDru na voln\u00E9 hladin\u011B v n\u00E1dob\u011B bez nar\u00E1\u017Eek m\u00EDchan\u00E9 t\u0159\u00EDlopatkov\u00FDm m\u00EDchadlem se zak\u0159iven\u00FDmi lopatkami" . "Numeric simulation; CFD; FLUENT; Mixing; Stirred vessel; Multiphase; VOF"@en . . "Praha" . "Vl\u010Dek, Petr" . "8"^^ . "3"^^ . . "2013-10-14+02:00"^^ . . . "64864" . . "RIV/68407700:21220/13:00208549" . . . "RIV/68407700:21220/13:00208549!RIV14-MSM-21220___" . .