Related Experiment Video
Updated: Oct 18, 2026

Studying Large Amplitude Oscillatory Shear Response of Soft Materials
Published on: April 25, 2019
Emergence of Purely Elastoplastic Turbulence in Shear Flows
Muhammad Abdullah1, Shravan Pradeep1,2, Doug J Jerolmack1,2
1University of Pennsylvania, Department of Mechanical Engineering and Applied Mechanics, Philadelphia, Pennsylvania 19104, USA.
Abstract:
Yield-stress fluids only flow above a critical stress. Here, we observe the emergence of a distinct, elasticity-driven flow state in a yield-stress fluid in the absence of inertia. Numerical simulations show that this elastoplastic turbulent state is characterized by non-Gaussian bimodal velocity distribution and a broad spectrum of velocity and stress fluctuations. Results show a nonmonotonic relationship between the volume fraction of the unyielded flow and plasticity. Surprisingly, the system can fluidize near the emergence of the elastoplastic turbulent state. Our results reveal the complex interplay between elasticity and plasticity in simple shear flows, indicating that plasticity can mobilize the flow rather than arrest it. These findings are relevant for the flow and stability of muds, clays, and soft materials in general.
Related Concept Videos
Elastic Strain Energy for Shearing Stresses
Members Made of Elastoplastic Material
As the bending moment...
Turbulent Flow
Navier–Stokes Equations
Newtonian Fluid: Problem Solving
A velocity gradient forms within the fluid when a Newtonian fluid is placed between two parallel plates, with...
Laminar and Turbulent Flow

