caa a22 4500 606188347 CHVBK 20210128100844.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s10891-015-1169-7 doi (NATIONALLICENCE)springer-10.1007/s10891-015-1169-7 Design of a Gas-Liquid Unbaffled Stirred Tank with a Concave Blade Impeller [Elektronische Daten] [T. Devi, Bimlesh Kumar] Experimental investigation of unbaffled multiphase (gas-liquid) stirred tanks is conducted with the use of a concave blade impeller to analyze mass transfer, gassed power, and gas holdup. The experiments are carried out with various impeller diameter to tank diameter ratios and impeller clearances. The design criterion for the mass transfer rate is proposed, and its prediction capability is found to be satisfactory. The results show that the gassed power is dependent on the impeller diameter to tank diameter ratio and impeller clearance. The design criteria for gassed power to ungassed power ratio and gas holdup are also introduced. Multiphase modeling is done by employing the computational fluid dynamics (CFD) techniques to observe the characteristic flow pattern transition and to carry out a qualitative analysis of the mass transfer rate. Springer Science+Business Media New York, 2015 concave blade impeller nationallicence gas holdup nationallicence impeller clearance nationallicence mass transfer nationallicence power number nationallicence stirred tank nationallicence Devi T. Institute of Technology Guwahati, 781039, Guwahati, India aut Kumar Bimlesh Institute of Technology Guwahati, 781039, Guwahati, India aut Journal of Engineering Physics and Thermophysics Springer US; http://www.springer-ny.com 88/1(2015-01-01), 76-87 1062-0125 88:1<76 2015 88 10891 https://doi.org/10.1007/s10891-015-1169-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10891-015-1169-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Devi T. Institute of Technology Guwahati, 781039, Guwahati, India aut NATIONALLICENCE 700 1- Kumar Bimlesh Institute of Technology Guwahati, 781039, Guwahati, India aut NATIONALLICENCE 773 0- Journal of Engineering Physics and Thermophysics Springer US; http://www.springer-ny.com 88/1(2015-01-01), 76-87 1062-0125 88:1<76 2015 88 10891