화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korea-Australia Rheology Journal, Vol.33, No.3, 283-291, August, 2021
DOI10.1007/s13367-021-0022-0  Export Citation
The influence of the negative wake on the deformation and breakup of viscoelastic droplets
Fernando Carril-Naranjo, Baltsar Mena, Didier Samayoa1, Antonio Guerrero2, and Bernardo Figueroa-Espinoza†
  • Universidad Nacional Autónoma de México, Instituto de Ingeniería, LIPC, Yucatán, Sisal 97355, Mexico
  • 1Instituto Politécnico Nacional, SEPI-ESIME, Unidad Profesional Adolfo López Mateos, Mexico City 07738, Mexico
  • 2Escuela Politécnica Superior, Virgen de Africa 7, Sevilla 41011, Spain
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Experiments were performed using visual and PIV techniques in order to study the appearance of a negative wake as well as its influence upon the deformation and breakup of droplets rising in viscoelastic fluids. In this report, Newtonian and viscoelastic drops were injected through different viscoelastic fluids; the deformation of the droplets was then followed and analyzed. In the case of Newtonian drops traveling through a viscoelastic fluid, a tail appears which later breaks into satellite droplets; a negative wake is present on the sides of the tail. The viscoelastic drops also exhibit a tail which is more resistant to rupture and the negative wake appears after the tail; additionally, a bump appears at the tip of the tail which enhances its elongation and determines the onset of breakup.
Keywords:viscoelastic droplets;negative wake;PIV;tail breakup
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