Wave dynamics of a viscoelastic liquid

A Samanta - International Journal of Engineering Science, 2023 - Elsevier
A falling film of a weakly viscoelastic liquid (Walters' liquid B′′) is studied in detail for low
to moderate values of the Reynolds number. A linear stability analysis within the framework …

Roll waves on laminar sheet flow of Newtonian fluid with negligible surface tension

B Yu, VH Chu - Journal of Fluid Mechanics, 2024 - cambridge.org
We conduct direct numerical simulations (DNS) to study the temporal and spatial
developments of the roll waves on a laminar sheet flow of Newtonian fluid. The DNS unveil …

Nonlinear flow phenomenon of a power-law non-Newtonian fluid falling down a cylinder surface

C Ma, F Zhang, D Zhang, C Yu, G Wang - Communications in Nonlinear …, 2024 - Elsevier
In this paper, we present a comprehensive study of the fingering phenomenon of a power-
law non-Newtonian fluid falling down a cylinder surface. A theoretical analysis is firstly …

A consistent three-equation shallow-flow model for Bingham fluids

D Denisenko, GL Richard, G Chambon - Journal of Non-Newtonian Fluid …, 2023 - Elsevier
We derive a model for Bingham fluid flows down an inclined plane with a consistent
asymptotic method in the shallow-flow approximation. The variables are expanded up to the …

A three-equation model for thin films down an inclined plane

GL Richard, C Ruyer-Quil, JP Vila - Journal of Fluid Mechanics, 2016 - cambridge.org
We derive a new model for thin viscous liquid films down an inclined plane. With an
asymptotic expansion in the long-wave limit, the Navier–Stokes equations and the work …

Derivation and numerical resolution of 2D shallow water equations for multi-regime flows of Herschel–Bulkley fluids

DK Muchiri, J Monnier, M Sellier - European Journal of Mechanics-B/Fluids, 2025 - Elsevier
This paper presents mathematical modelling and simulation of thin free-surface flows of
viscoplastic fluids with a Herschel–Bulkley rheology over complex topographies with basal …

Rheology dictated spreading regimes of a non-isothermal sessile drop

VT Mantripragada, A Poddar - Journal of Fluid Mechanics, 2022 - cambridge.org
In the present work, within the framework of thin film theory, we delineate the interaction
between the interfacial dynamics of thermal Marangoni flow and non-Newtonian rheology by …

Long-wave instability of a regularized Bingham flow down an incline

B Calusi, A Farina, L Fusi, F Rosso - Physics of Fluids, 2022 - pubs.aip.org
We investigate the linear stability of a flow down an incline when the fluid is modeled as a
regularized Bingham-like fluid, ie, a material whose constitutive equation is smoothed out …

Numerical simulation of mud-flows impacting structures

M Greco, C Di Cristo, M Iervolino, A Vacca - Journal of Mountain Science, 2019 - Springer
The study of the interaction of mud-flows with obstacles is important to define inundation
zones in urban areas and to design the possible structural countermeasures. The paper …

Roll Waves in Mudflow Modeled as Herschel–Bulkley Fluids

B Yu, VH Chu - Journal of Engineering Mechanics, 2024 - ascelibrary.org
We develop a multilayer model to study roll waves in mudflow of Herschel–Bulkley fluids
initiated by periodic and localized disturbance. Simulations are conducted of the temporal …