BUBBLE FORMATION AT A SUBMERGED ORIFICE IN NON-NEWTONIAN AND HIGHLY VISCOUS NEWTONIAN LIQUIDS

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

TERUO TAKAHASHI¹  TOSHIRO MIYAHARA¹  WEI-HONG WANG¹ 

[1] Department of Applied Chemistry, Okayama University

关键词: Fluid Mechanics;    Bubble Formation;    Single Orifice;    Non-Newtonian Liquid;    Viscous Newtonian Liquid;    Biochemical Engineering;    Absorption;   

DOI  :  10.1252/jcej.21.620

来源: Maruzen Company Ltd

【 摘 要 】

References(16)Cited-By(9)Bubble formation at a submerged orifice was studied experimentally for non-Newtonian liquids (aqueous CMC solutions) and highly viscous Newtonian liquids (aqueous glycerol solutions). The bubble volumes formed in both non-Newtonian and highly viscous Newtonian liquids are large compared to those formed in relatively low-viscosity Newtonian liquids. The formation regime of the constant-pressure condition, usually found for low-viscosity Newtonian liquids as reported by Tadaki et al., 12) was not observed. Using an extended two-stage bubble-formation model, the bubble volumes formed at a submerged orifice in non-Newtonian and highly viscous Newtonian liquids are considered. The predicted bubble volumes compare satisfactorily with the experimental data over a wide range of parameters of power law liquid (m < around 8Pa. sn, 0.95 > n > 0.57) and viscosities of Newtonian liquids (5.05 Pa. s > μl > 0.439Pa s) including the results of the present work and that of Tsuge et al.13, 15)

【 授权许可】

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