Relationship between the dispersed droplet diameter and the mean power input for emulsification in several types of motionless mixers

• Autorzy: Yamamoto T. , Kawasaki H. , Kumazawa H.
• Języki publikacji: EN

Abstrakty

EN

Continuous emulsification of low-viscosity liquids was investigated with three different types of motionless mixers, i.e., Needle Jetting Mixer (NJM), Kenics Static Mixer ® (KSM) and Ramond Supermixer ® (RSM). Kerosene and n-heptane were used as the continuous phase, in which nonionic surfactant (Span80) was dissolved, and deionized water was the dispersed phase. The size distributions of water droplets in emulsions were normalized by the Sauter mean diameter (d32), and then they obeyed a log-normal distribution function with an upper-limit. The correlations of d32 with the mean power input per unit mass of the media within the region where the drop dispersion mainly occurred (PM) were derived. The PM levels of these motionless mixers were the same as these of agitation vessel. The slopes of the correlation lines on the log (d32) - log (PM) correlation chart took almost the same value of -0.4, which agreed with the value derived from isotropic turbulence law in low-viscosity liquids. As the line for RSM was located below those for NJM and KSM, RSM may be the most energy-efficient device of the three.

Słowa kluczowe

EN

drop size; emulsification; mixers; low-viscosity liquids

PL

rozmiar kropli; emulgowanie; mieszalniki; ciecze o małej lepkości

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Environment Protection Engineering
• Rocznik: 2010
• Tom: Vol. 36, nr 4
• Strony: 5--21
• Opis fizyczny: Bibliogr. 22 poz.

Twórcy

autor

Yamamoto T.

autor

Kawasaki H.

autor

Kumazawa H.

• Department of Life Sciences and Bioengineering, Faculty of Engineering, University of Toyama, 3190 Gofuku, Toyamashi, Toyama 930-8555, Japan.,

Bibliografia

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