Synergetic Effect of Wall-Slip and Compressibility During Startup Flow of Complex Fluids
Abstract
The present letter explains the synergetic effect of wall-slip, compressibility, and thixotropy in a pressurized flow startup operation of various structured fluids. Opposite to the intuition, experimental and numerical simulations suggest that the wall-slip (adhesive failure) is facilitating gel degradation (cohesive failure), revealing a new flow-startup mechanism. The thixotropic rheological model includes structural degradation kinetics at the bulk. Whereas, a static slip-based model addresses the near-wall phenomenon. The near-wall transient variations in axial velocity or strain evolution, and the initial pressure propagation mechanism along the axis of the circular pipe explain the essence of the aforementioned synergy.
Cite
@article{arxiv.2301.03898,
title = {Synergetic Effect of Wall-Slip and Compressibility During Startup Flow of Complex Fluids},
author = {Aniruddha Sanyal and Sachin Balasaheb Shinde and Lalit Kumar},
journal= {arXiv preprint arXiv:2301.03898},
year = {2023}
}
Comments
submitted elsewhere also for publication, it contains 33 pages