Vortex flow evolution in a growing microdroplet during co-flow in coaxial capillaries
Using micro-particle image velocimetry (μPIV), the convective flow inside a silicone oil droplet was investigated in detail during its formation in coaxial capillaries under co-flow in a water/glycerol mixture continuous phase. The analysis of μPIV measured flow field revealed that two characteristi...
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| Veröffentlicht in: | Physics of fluids (1994) 2021-07, Vol.33 (7) |
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| container_title | Physics of fluids (1994) |
| container_volume | 33 |
| creator | Vagner, S. A. Patlazhan, S. A. Serra, C. A. Funfschilling, D. |
| description | Using micro-particle image velocimetry (μPIV), the convective flow inside a silicone oil droplet was investigated in detail during its formation in coaxial capillaries under co-flow in a water/glycerol mixture continuous phase. The analysis of μPIV measured flow field revealed that two characteristic flow areas exist in the droplet in formation: an inflow zone and a circulation zone. The intensity of vortex flow in these zones was estimated by calculating the average angular velocity of these vortices under the condition of no shear for different dispersed phase and continuous phase flow rates and for different viscosity ratios between the two phases. The evolution of the vortex flow pattern inside the droplet was investigated thoroughly all the way from the step of their formation to the step of the free-moving droplet. The results of this study are important for understanding the mixing processes inside the droplet at different stages of its formation. |
| doi_str_mv | 10.1063/5.0057353 |
| format | Article |
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The evolution of the vortex flow pattern inside the droplet was investigated thoroughly all the way from the step of their formation to the step of the free-moving droplet. The results of this study are important for understanding the mixing processes inside the droplet at different stages of its formation.</description><identifier>ISSN: 1070-6631</identifier><identifier>EISSN: 1089-7666</identifier><identifier>DOI: 10.1063/5.0057353</identifier><identifier>CODEN: PHFLE6</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>Angular velocity ; Capillaries ; Convective flow ; Droplets ; Evolution ; Flow distribution ; Flow velocity ; Fluid dynamics ; Fluid flow ; Fluid mechanics ; Glycerol-Water ; Mechanics ; Particle image velocimetry ; Physics ; Viscosity ratio ; Vortices</subject><ispartof>Physics of fluids (1994), 2021-07, Vol.33 (7)</ispartof><rights>Author(s)</rights><rights>2021 Author(s). 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The results of this study are important for understanding the mixing processes inside the droplet at different stages of its formation.</description><subject>Angular velocity</subject><subject>Capillaries</subject><subject>Convective flow</subject><subject>Droplets</subject><subject>Evolution</subject><subject>Flow distribution</subject><subject>Flow velocity</subject><subject>Fluid dynamics</subject><subject>Fluid flow</subject><subject>Fluid mechanics</subject><subject>Glycerol-Water</subject><subject>Mechanics</subject><subject>Particle image velocimetry</subject><subject>Physics</subject><subject>Viscosity ratio</subject><subject>Vortices</subject><issn>1070-6631</issn><issn>1089-7666</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNp9kMFKAzEQhoMoWKsH32DBk8LWZNNkk2MpaoWCF-s1TLPZmpI2a7Lb1rd315b2IHiaYfjmY-ZH6JbgAcGcPrIBxiynjJ6hHsFCpjnn_Lzrc5xyTskluopxiTGmMuM9NPvwoTa7pHR-m5iNd01t_Tqx6wSSRfBbu14kK6uDL4KvnKmTogndTPv0d6UFtYedBZdoqKxzEKyJ1-iiBBfNzaH20ez56X08SadvL6_j0TTVVPI65UAKLkpCpDGZFEBBgpG8nGM5LAjH2vBCCAmgodRYMk45zueMMFEITjNB--h-7_0Ep6pgVxC-lQerJqOp6maYDjNKCN6Qlr3bs1XwX42JtVr6Jqzb81TGWEbyNq3hydi-HGMw5VFLsOoSVkwdEm7Zhz0bta2hy-0Ib3w4gaoqyv_gv-YfX1uIvQ</recordid><startdate>20210701</startdate><enddate>20210701</enddate><creator>Vagner, S. 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The intensity of vortex flow in these zones was estimated by calculating the average angular velocity of these vortices under the condition of no shear for different dispersed phase and continuous phase flow rates and for different viscosity ratios between the two phases. The evolution of the vortex flow pattern inside the droplet was investigated thoroughly all the way from the step of their formation to the step of the free-moving droplet. The results of this study are important for understanding the mixing processes inside the droplet at different stages of its formation.</abstract><cop>Melville</cop><pub>American Institute of Physics</pub><doi>10.1063/5.0057353</doi><tpages>17</tpages><orcidid>https://orcid.org/0000-0002-5165-0017</orcidid><orcidid>https://orcid.org/0000-0002-6186-8036</orcidid><orcidid>https://orcid.org/0000-0003-2584-4237</orcidid><orcidid>https://orcid.org/0000-0002-8424-9633</orcidid><oa>free_for_read</oa></addata></record> |
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| ispartof | Physics of fluids (1994), 2021-07, Vol.33 (7) |
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| language | eng |
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| source | AIP Journals Complete; Alma/SFX Local Collection |
| subjects | Angular velocity Capillaries Convective flow Droplets Evolution Flow distribution Flow velocity Fluid dynamics Fluid flow Fluid mechanics Glycerol-Water Mechanics Particle image velocimetry Physics Viscosity ratio Vortices |
| title | Vortex flow evolution in a growing microdroplet during co-flow in coaxial capillaries |
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