67 citations · 324 across the 24 of their papers we have counts for
24 papers
Nash epidemics
Simon K. Schnyder, John J. Molina, Ryoichi Yamamoto +1
Faced with a dangerous epidemic humans will spontaneously social distance to reduce their risk of infection at a socio-economic cost. Compartmentalised epidemic models have been ex…
Propulsion of a chiral swimmer in viscoelastic fluids
Takuya Kobayashi, John J. Molina, Ryoichi Yamamoto
Microswimmers often use chirality to generate translational movement from rotation motion, exhibiting distinct behaviors in complex fluids compared to simple Newtonian fluids. Howe…
Rational social distancing in epidemics with uncertain vaccination timing
Simon K. Schnyder, John J. Molina, Ryoichi Yamamoto +1
During epidemics people may reduce their social and economic activity to lower their risk of infection. Such social distancing strategies will depend on information about the cours…
Learning to swim efficiently in a nonuniform flow field
Krongtum Sankaewtong, John J. Molina, Matthew S. Turner +1
Microswimmers can acquire information on the surrounding fluid by sensing mechanical queues. They can then navigate in response to these signals. We analyse this navigation by comb…
Dynamics of microswimmers near a liquid-liquid interface with viscosity difference
Chao Feng, John J. Molina, Matthew S. Turner +1
Transport of material across liquid interfaces is ubiquitous for living cells and is also a crucial step in drug delivery and in many industrial processes. The fluids that are pres…
Dynamics of microswimmers near a soft penetrable interface
Chao Feng, John J. Molina, Matthew S. Turner +1
Few simulations exist for microswimmers near deformable interfaces. Here, we present numerical simulations of the hydrodynamic flows associated with a single microswimmer embedded…
Collective Motion of Quincke Rollers with Fully Resolved Hydrodynamics
Shun Imamura, Kohei Sawaki, John J. Molina +2
A Quincke roller is a unique active particle that can run and tumble freely on a flat plate due to the torque generated by a uniform DC electric field applied perpendicular to the…
Rational social distancing policy during epidemics with limited healthcare capacity
Simon K. Schnyder, John J. Molina, Ryoichi Yamamoto +1
Epidemics of infectious diseases posing a serious risk to human health have occurred throughout history. During recent epidemics there has been much debate about policy, including…
Nash Neural Networks : Inferring Utilities from Optimal Behaviour
John J. Molina, Simon K. Schnyder, Matthew S. Turner +1
We propose Nash Neural Networks () as a new type of Physics Informed Neural Network that is able to infer the underlying utility from observations of how rational individuals…
Dynamics of a chiral swimmer sedimenting on a flat plate
Federico Fadda, John Jairo Molina, Ryoichi Yamamoto
Three-dimensional simulations with fully resolved hydrodynamics are performed to study the dynamics of a single squirmer under gravity, in order to clarify its motion in the vicini…
Spontaneous Spatiotemporal Ordering of Shape Oscillations Enhances Cell Migration
Matteo Campo, Simon K. Schnyder, John J. Molina +2
The migration of cells is relevant for processes such as morphogenesis, wound healing, and invasion of cancer cells. In order to move, single cells deform cyclically. However, it i…
Control of cell colony growth by contact inhibition
Simon K. Schnyder, John J. Molina, Ryoichi Yamamoto
We investigate the dynamics of a colony of crawling, proliferating cells with a minimal, mechanical cell model. The cells consist of two disks, modelling the cell body and a pseudo…
Modeling the Mechanosensitivity of Fast-Crawling Cells on Cyclically Stretched Substrates
John J. Molina, Ryoichi Yamamoto
The mechanosensitivity of cells, which determines how they are able to respond to mechanical signals received from their environment, is crucial for the functioning of all biologic…
Hydrodynamic synchronization of externally driven colloids
Norihiro Oyama, Kosuke Teshigawara, John Jairo Molina +2
The collective dynamics of externally driven -colloidal systems () in a confined viscous fluid have been investigated using three-dimensional direct…
Noise induced phase separation in active systems: Creating patterns with noise
Kosuke Matsui, John J. Molina
We study the flocking and pattern formations of active particles with a Vicsek-like model that includes a configuration dependent noise term. In particular, we couple the strength…
Hydrodynamic alignment of microswimmers in pipes
Norihiro Oyama, John Jairo Molina, Ryoichi Yamamoto
We investigate the dynamics of model microswimmers under confinement, in cylindrical geometries, by means of three dimensional direct numerical calculations with fully resolved hyd…
Collective motion of cells crawling on a substrate: roles of cell shape and contact inhibition
Simon Kaspar Schnyder, Yuki Tanaka, John Jairo Molina +1
Contact inhibition plays a crucial role in the motility of cells, the process of wound healing, and the formation of tumors. By mimicking the mechanical motion of calls crawling on…
Do hydrodynamically assisted binary collisions lead to orientational ordering of microswimmers?
Norihiro Oyama, John Jairo Molina, Ryoichi Yamamoto
We have investigated the onset of collective motion in systems of model microswimmers, by performing a comprehensive analysis of the binary collision dynamics using three dimension…
Collective behavior of strongly confined suspensions of squirmers
Jean-Baptiste Delfau, John Molina, Masaki Sano
We run numerical simulations of strongly confined suspensions of model spherical swimmers called "squirmers". Because of the confinement, the Stokeslet dipoles generated by the par…
Purely hydrodynamic origin for swarming of swimming particles
Norihiro Oyama, John Jairo Molina, Ryoichi Yamamoto
Three-dimensional simulations with fully resolved hydrodynamics are performed to study the collective motion of model swimmers in confinement. We show that certain swimming mechani…
Direct numerical simulations of rigid body dispersions. I. Mobility/Friction tensors of assemblies of spheres
John Jairo Molina, Ryoichi Yamamoto
An improved formulation of the Smoothed Profile method is introduced to perform direct numerical simulations of arbitrary rigid body dispersions in a Newtonian host solvent. Previo…
Hydrodynamic Interactions of Self-Propelled Swimmers
John J. Molina, Yasuya Nakayama, Ryoichi Yamamoto
The hydrodynamic interactions of a suspension of self-propelled particles are studied using a direct numerical simulation method which simultaneously solves for the host fluid and…
A transferable ab-initio based force field for aqueous ions
Sami Tazi, John J. Molina, Benjamin Rotenberg +3
We present a new polarizable force field for aqueous ions (Li+, Na+, K+, Rb+, Cs+, Mg2+, Ca2+, Sr2+ and Cl-) derived from condensed phase ab-initio calculations. We use Maximally L…
Models of electrolyte solutions from molecular descriptions: The example of NaCl solutions
J. J. Molina, J. -F. Dufreche, M. Salanne +3
We present a method to derive implicit solvent models of electrolyte solutions from all-atom descriptions; providing analytical expressions of the thermodynamic and structural prop…