Deformation and initial breakup morphology of viscous emulsion drops in isotropic homogeneous turbulence with relevance for emulsification devices

Håkansson, AndreasLund University,Lunds universitet,Avdelningen för livsmedel och läkemedel,Institutionen för processteknik och tillämpad biovetenskap,Institutioner vid LTH,Lunds Tekniska Högskola,Division of Food and Pharma,Department of Process and Life Science Engineering,Departments at LTH,Faculty of Engineering, LTH (author)

QC 20220530
This study uses numerical experiments to investigate initial breakup morphology for conditions similar to those experienced in an emulsification device (e.g., a high-pressure homogenizer) (Rek = 33, We = 1-30, mu D/mu C = 22, PD/PC = 0.9, D/ri = 22). Results show breakup consisting of two phases: and 'oscillatory phase' where the drops are periodically deforming and relaxing, followed by a 'critical deformation phase' where the drop deforms continuously until initial breakup. Large drops (We > 13) go directly to the breakup phase and are highly deformed in multiple direction before bursting. Smaller drops (3 < We < 5) are less likely to go directly to the critical deformation phase and more likely to never reach it before exiting the device. These drops break by the formation of a single filament, creating two large fragments and a number of smaller satellites. Several turbulent structures contribute to critical deformation.

Brandt, LucaKTH Royal Institute of Technology,KTH,Linné Flow Center, FLOW,Strömningsmekanik och Teknisk Akustik,Norwegian Univ Sci & Technol NTNU, Dept Energy & Proc Engn, Trondheim, Norway.,Norwegian University of Science and Technology(Swepub:kth)u15iawoo (author)
Avdelningen för livsmedel och läkemedelInstitutionen för processteknik och tillämpad biovetenskap (creator_code:org_t)

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SOCIAL SCIENCES: SOCIAL SCIENCES; and Other Social Sci ...; and Social Sciences ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Applied Mechanic ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Other Engineerin ...; and Food Engineering

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Fluid Mechanics ...

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