caa a22 4500 605466580 CHVBK 20210128100307.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s00397-015-0861-z doi (NATIONALLICENCE)springer-10.1007/s00397-015-0861-z Filament thinning of silicone oil/poly(methyl methacrylate) suspensions under extensional flow [Elektronische Daten] [Joo Moon, Seong Lee, Kyung Ahn, Seung Lee] We investigate the effect of particles dispersed in a Newtonian medium on the filament breakup of suspensions under extensional flow. In particular, we focus on the final stage of the breakup process: 10μm poly(methyl methacrylate) (PMMA) particles with 0∼20wt% are dispersed in silicone oil and the effects of the added particles on the thinning dynamics of the filament are observed with time-dependent changes in the minimum neck diameter (W). The particles decelerate the breakup process until the minimum thickness (W) of the filament becomes 5 d (d = 10μm: particle diameter), and then they accelerate the process rapidly until the pinch-off. When the thinning dynamics and filament shape of the 20wt% PMMA suspension are compared with those of a silicone oil with the same viscosity and surface tension, the particles affect the thinning dynamics by changing the breakup velocity under W∼35 d compared with the viscosity-matched silicone oil. When the filament becomes thinner than W∼10 d, the particles induce different surface shapes compared with those of the viscosity-matched silicone oil. When the filament becomes thinner than W∼5 d, the roughness of the filament surface increases. Thus, the effect of the particles in the final stage of filament breakup is more complicated than that in the initial stage, and we demonstrate that the particles dispersed in a Newtonian medium induce complex behaviors in the final stage of filament breakup. Springer-Verlag Berlin Heidelberg, 2015 Flow visualization nationallicence Extensional flow nationallicence Filament thinning nationallicence Silicone oil/PMMA suspension nationallicence Moon Joo School of Chemical and Biological Engineering, Institute of Chemical Process, Seoul National University, 1 Gwanak-ro, 151-744, Gwanak-gu, Seoul, Republic of Korea aut Lee Seong Department of Polymer Engineering, The University of Suwon, 17 Wauan-gil, Bongdam-eup, 445-743, Hwaseong, Gyeonggi, Republic of Korea aut Ahn Kyung School of Chemical and Biological Engineering, Institute of Chemical Process, Seoul National University, 1 Gwanak-ro, 151-744, Gwanak-gu, Seoul, Republic of Korea aut Lee Seung School of Chemical and Biological Engineering, Institute of Chemical Process, Seoul National University, 1 Gwanak-ro, 151-744, Gwanak-gu, Seoul, Republic of Korea aut Rheologica Acta Springer Berlin Heidelberg 54/8(2015-08-01), 705-714 0035-4511 54:8<705 2015 54 397 https://doi.org/10.1007/s00397-015-0861-z 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/s00397-015-0861-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Moon Joo School of Chemical and Biological Engineering, Institute of Chemical Process, Seoul National University, 1 Gwanak-ro, 151-744, Gwanak-gu, Seoul, Republic of Korea aut NATIONALLICENCE 700 1- Lee Seong Department of Polymer Engineering, The University of Suwon, 17 Wauan-gil, Bongdam-eup, 445-743, Hwaseong, Gyeonggi, Republic of Korea aut NATIONALLICENCE 700 1- Ahn Kyung School of Chemical and Biological Engineering, Institute of Chemical Process, Seoul National University, 1 Gwanak-ro, 151-744, Gwanak-gu, Seoul, Republic of Korea aut NATIONALLICENCE 700 1- Lee Seung School of Chemical and Biological Engineering, Institute of Chemical Process, Seoul National University, 1 Gwanak-ro, 151-744, Gwanak-gu, Seoul, Republic of Korea aut NATIONALLICENCE 773 0- Rheologica Acta Springer Berlin Heidelberg 54/8(2015-08-01), 705-714 0035-4511 54:8<705 2015 54 397