Stretching in turbulent fluid regimes

Authors

Emmanuel Lance Plan ⋅ VN Hanoi School of Business, Vietnam National University

Abstract

Fluids display non-Newtonian behavior when additional stress components are introduced, via moving particles or stretching components. I will begin by providing a brief overview of the interesting dynamics of active and polymeric fluids, followed by more recent work in the field of polymers in turbulent flow. In particular, we will see how the probability distribution function (pdf) of polymer length configuration develops a power-law tail with exponent over time, being a constant depending on the polymer Weissenberg number Wi. Through numerical simulations, we identify two distinct regimes, governed by and the value of the exponent: an evolving power-law regime for below approximately 3/4 and a rapid-stretching regime for more extensible polymers. The former displays a power-law configuration even at early times, with a power law exponent increasing to its stationary value. For polymers with Wi bigger than 3/4, a transient power law develops but gives way to the formation of a local peak in the pdf, subsequently dictating the form of the stationary pdf. These results are compared to and analyzed via a stochastic model (approximating turbulence).

About the Speaker

Emmanuel Lance Plan, Hanoi School of Business, Vietnam National University

Emmanuel Lance Christopher VI Plan graduated from Ateneo de Manila University with a Bachelor of Science in Mathematics in 2010. He obtained his masteral and doctorate degrees from the National University of Singapore and graduated with a doctorate in Physics in 2017 with specialization in Fluid Dynamics. He explored biophysical fluid dynamics during his postdoctoral studies at the University of Oxford and a research stint at Duy Tan University in Vietnam. He is currently a researcher and lecturer at the Hanoi School of Business and Management, Vietnam National University in Hanoi, and transitioning from research in pure natural sciences to applied data science. He has also collaborated with colleagues on molecular dynamics simulations and wave propagation in multi-layered surfaces with viscoelastic properties.

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Issue

2023: Proceedings of the 41st Samahang Pisika ng Pilipinas Physics Conference

Article ID

SPP-2023-INV-2H-01

Section

Invited Presentations

Published

2023-07-01

How to Cite

[1]

EL Plan, Stretching in turbulent fluid regimes, Proceedings of the Samahang Pisika ng Pilipinas 41, SPP-2023-INV-2H-01 (2023). URL: https://proceedings.spp-online.org/article/view/SPP-2023-INV-2H-01.