A few examples of viscoplastic flow instabilities: experiments, theory and numerical simulations
Effect of rheology on compression (top) and rupture (bottom) instabilities of various fluid filaments, model/experiment comparison
| When |
Mar 22, 2022
from 02:00 to 03:00 |
|---|---|
| Where | Salle des thèses |
| Attendees |
Rudy Valette |
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Complex fluids such as pastes, suspensions, emulsions, etc. generally exhibit a strongly non-Newtonian rheology. They thus flow very differently from fluids such as air, water, or honey. We will show various examples of flows (stretching or compression of filaments, jets, impacts...) presenting instabilities related to their rheology and will discuss using experiments, numerical simulations, and simple theoretical analysis the mechanisms involved in these flows. Several examples will be proposed and the interest of numerical simulation will be underlined both for the understanding of simple phenomena, but also the prediction of more complex flows encountered in industry.