20 citations · 38 across the 8 of their papers we have counts for
10 papers
Inertialess instability of elasto-viscoplastic circular Couette flow
James D. Shemilt, Neil J. Balmforth, Duncan R. Hewitt
An exploration is presented of two-dimensional, circular Couette flow of an elasto-viscoplastic fluid described by Saramito's (Bingham) constitutive law. Axisymmetrical base states…
Nonlinear evolution of instability in inertialess elasto-viscoplastic Poiseuille flow
James D. Shemilt, Neil J. Balmforth, Duncan R. Hewitt
A widely used constitutive law for elasto-viscoplastic fluids (Saramito's model) predicts linear instability in inertialess pressure-driven channel flow. The instability arises due…
Start-up and inertialess instability of elasto-viscoplastic channel flow
James D. Shemilt, Neil J. Balmforth, Duncan R. Hewitt
An exploration is presented of the start-up and linear stability of pressure-driven channel flow of an elasto-viscoplastic fluid described by Saramito's constitutive law. Streamwis…
Coalescence of Printed Yield Stress Filaments in Direct Ink Writing
Hugo L. França, Daniël Tieman, James D. Shemilt +2
In direct ink writing (DIW), neighbouring filaments of yield-stress inks are deposited side-by-side and are expected to merge into smooth, mechanically robust structures. Unlike Ne…
Air-driven dynamics of viscoplastic liquid layers
James D. Shemilt, Neil J. Balmforth, Duncan R. Hewitt
Airway clearance by coughing is a key mechanism for mucus transport, particularly in obstructive lung diseases associated with altered mucus rheology. We investigate the dynamics o…
Viscoplasticity can stabilise liquid collar motion on vertical cylinders
James D. Shemilt, Alice B. Thompson, Alex Horsley +2
Liquid films coating vertical cylinders can form annular liquid collars which translate downwards under gravity. We investigate the dynamics of a thin viscoplastic liquid film coat…
Non-local impact of distal airway constrictions on patterns of inhaled particle deposition
James D. Shemilt, Alex Horsley, Jim M. Wild +3
Airway constriction and blockage in obstructive lung diseases cause ventilation heterogeneity and create barriers to effective drug deposition. Established computational particle-d…
Correction and standardisation of lung oscillometry techniques using parameter inference: A study group report
Bindi S. Brook, Graeham R. Douglas, Oliver E. Jensen +7
This report relates to a study group hosted by the EPSRC funded network, Integrating data-driven BIOphysical models into REspiratory MEdicine (BIOREME), and supported by The Insign…
Surfactant amplifies yield-stress effects in the capillary instability of a film coating a tube
James D. Shemilt, Alex Horsley, Oliver E. Jensen +2
To assess how the presence of surfactant in lung airways alters the flow of mucus that leads to plug formation and airway closure, we investigate the effect of insoluble surfactant…
Surface-tension-driven evolution of a viscoplastic liquid coating the interior of a cylindrical tube
James Shemilt, Alexander Horsley, Oliver Jensen +2
One mechanism for airway closure in the lung is the surface-tension-driven instability of the mucus layer which lines the airway wall. We study the instability of an axisymmetric l…