Dispersed multiphase Taylor-Couette turbulence: From bubbly drag reduction to catastrophic phase inversion
Detlef Lohse (Univ. of Twente)
| Quand ? |
Le 10/10/2022, de 11:00 à 12:00 |
|---|---|
| Où ? | Salle Condorcet |
| Participants |
Detlef Lohse |
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Taylor-Couette flow has been used for more than a century to test various concepts in physics of fluid dynamics, from linear stability theory to pattern formation to turbulence. In Twente, we built the Twente Turbulent Taylor-Couette facility (T3C) and demonstrated the transition to the ultimate turbulence regime, with enhanced transport properties. With it, we can achieve Reynolds numbers way beyond 106.
In this talk I will show how we employed this facility to elucidate the physics of turbulent bubbly drag reduction and the catastrophic phase inversion from oil droplet immersed in water to water droplets immersed in water. I will also show some corresponding numerical simulations, though for much lower Reynolds numbers.