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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Normal and oblique drop impact of yield stress fluids with thixotropic effects

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Author(s):
Oishi, Cassio M. [1] ; Thompson, Roney L. [2] ; Martins, Fernando P. [1]
Total Authors: 3
Affiliation:
[1] Univ Estadual Paulista, Dept Matemat & Comp, Fac Ciencias & Tecnol, BR-19060900 Presidente Prudente, SP - Brazil
[2] Univ Fed Rio de Janeiro, Dept Mech Engn, Ctr Tecnol, COPPE, Ilha do Fundao, BR-24210240 Rio De Janeiro, RJ - Brazil
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF FLUID MECHANICS; v. 876, p. 642-679, OCT 10 2019.
Web of Science Citations: 0
Abstract

Normal and oblique drop impact on a solid surface is numerically analysed for yield stress fluids. A rich diversity of results are generated as a consequence of the exploration of the inertial, elastic, plastic and thixotropic features of the process, as well as the inclination of the solid surface. We show that drops of more thixotropic fluids have a higher tendency to bounce in the normal impact, and to roll or to bounce in the case of an oblique drop impact. Concerning elasticity, we found a critical value for the elastic Ohnesorge number above which no bouncing takes place. Experimental findings such as the fact that the stored energy due to the elasticity of the fluid drop plays a role similar to the stored energy of an interfacial nature in inelastic fluid drops are corroborated in the present study. (AU)

FAPESP's process: 13/07375-0 - CeMEAI - Center for Mathematical Sciences Applied to Industry
Grantee:Francisco Louzada Neto
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC