71 citations · 161 across the 22 of their papers we have counts for
11 papers · 1 filter
Far-field approximations for multi-timescale microswimmers near a boundary
Sara Drummond-Curtis, Mohit P. Dalwadi, Benjamin J. Walker
Hydrodynamic interactions with boundaries can significantly affect the trajectories of microscale swimmers. In simple swimmer models, a common assumption is that swimmer shape rema…
A homogenised model for dispersive transport and sorption in a heterogeneous porous medium
Lucy C Auton, Mohit P. Dalwadi, Ian M. Griffiths
When a fluid carrying a passive solute flows quickly through porous media, three key macroscale transport mechanisms occur. These mechanisms are diffusion, advection and dispersion…
Rapidly yawing spheroids in viscous shear flow: Emergent loss of symmetry
Mohit P. Dalwadi
We investigate the emergent three-dimensional (3D) dynamics of a rapidly yawing spheroidal swimmer interacting with a viscous shear flow. We show that the rapid yawing generates no…
Generalised Jeffery's equations for rapidly spinning particles. Part 1: Spheroids
Mohit P. Dalwadi, Clément Moreau, Eamonn A. Gaffney +2
The observed behaviour of passive objects in simple flows can be surprisingly intricate, and is complicated further by object activity. Inspired by the motility of bacterial swimme…
Generalised Jeffery's equations for rapidly spinning particles. Part 2: Helicoidal objects with chirality
Mohit P. Dalwadi, Clément Moreau, Eamonn A. Gaffney +2
In this two-part study, we investigate the motion of rigid, active objects in shear Stokes flow, focusing on bodies that induce rapid rotation as part of their activity. In Part 2,…
Emergent rheotaxis of shape-changing swimmers in Poiseuille flow
Benjamin J. Walker, Kenta Ishimoto, Clément Moreau +2
A simple model for the motion of shape-changing swimmers in Poiseuille flow was recently proposed and numerically explored by Omori et al. (2022). These explorations hinted that a…
A homogenised model for flow, transport and sorption in a heterogeneous porous medium
Lucy C. Auton, Satyajit Pramanik, Mohit P. Dalwadi +2
A major challenge in flow through porous media is to better understand the link between microstructure and macroscale flow and transport. For idealised microstructures, the mathema…
Optimising the flow through a concertinaed filtration membrane
Victoria E. Pereira, Mohit P. Dalwadi, Enrique Ruiz-Trejo +1
Membrane filtration is a vital industrial process, with applications including air purification and blood filtration. In this paper, we study the optimal design for a concertinaed…
A multiscale method to calculate filter blockage
Mohit. P. Dalwadi, Maria Bruna, Ian M. Griffiths
Filters that act by adsorbing contaminant onto their pore walls will experience a decrease in porosity over time, and may eventually block. As adsorption will generally be larger t…
On the boundary layer structure near a highly permeable porous interface
Mohit P. Dalwadi, S. Jonathan Chapman, Sarah L. Waters +1
The method of matched asymptotic expansions is used to study the canonical problem of steady laminar flow through a narrow two-dimensional channel blocked by a tight-fitting finite…
Understanding how porosity gradients can make a better filter using homogenization theory
Mohit P. Dalwadi, Ian M. Griffiths, Maria Bruna
Filters whose porosity decreases with depth are often more efficient at removing solute from a fluid than filters with a uniform porosity. We investigate this phenomenon via an ext…