Motion in stratified fluids

RV More, AM Ardekani - Annual Review of Fluid Mechanics, 2023 - annualreviews.org
Density stratification due to temperature or salinity variations greatly influences the flow
around and the sedimentation of objects such as particles, drops, bubbles, and small …

Fluid dynamics of squirmers and ciliated microorganisms

T Ishikawa - Annual Review of Fluid Mechanics, 2024 - annualreviews.org
The fluid dynamics of microswimmers has received attention from the fields of microbiology,
microrobotics, and active matter. Microorganisms have evolved organelles termed cilia for …

Two-dimensional study on the motion and interactions of squirmers under gravity in a vertical channel

D Nie, Y Ying, G Guan, J Lin, Z Ouyang - Journal of Fluid Mechanics, 2023 - cambridge.org
We simulated the motions and interactions of circular squirmers under gravity in a two-
dimensional channel at finite fluid inertia, aiming to provide a comprehensive analysis of the …

Study on the sedimentation and interaction of two squirmers in a vertical channel

Y Ying, T Jiang, D Nie, J Lin - Physics of Fluids, 2022 - pubs.aip.org
We simulated the sedimentation of two self-propelled particles in a two-dimensional (2D)
vertical channel using the lattice Boltzmann method. A 2D squirmer model was employed to …

Swimming mode of two interacting squirmers under gravity in a narrow vertical channel

G Guan, J Lin, D Nie - Entropy, 2022 - mdpi.com
The swimming mode of two interacting squirmers under gravity in a narrow vertical channel
is simulated numerically using the lattice Boltzmann method (LBM) in the range of self …

50-year history and perspective on biomechanics of swimming microorganisms: Part II. Collective behaviours

T Ishikawa, TJ Pedley - Journal of Biomechanics, 2023 - Elsevier
The paired review papers in Parts I and II describe the 50-year history of research on the
biomechanics of swimming microorganisms and its prospects in the next 50 years. Parts I …

Study on the interaction and motion patterns of squirmers swimming in a shear flow

G Guan, J Lin - Physics of Fluids, 2023 - pubs.aip.org
In order to study the dynamic characteristics of micro-organisms or engineered swimmers,
the simulations of the motion and interaction of a pair of squirmers in a shear flow are …

Squirming in density-stratified fluids

VA Shaik, AM Ardekani - Physics of Fluids, 2021 - pubs.aip.org
In this work, we study the axisymmetric motion of a prototypical swimming organism, a
spherical squirmer, in a linearly density-stratified fluid. We assume the inertia is negligible …

Orientation instability of settling spheroids in a linearly density-stratified fluid

RV More, MN Ardekani, L Brandt… - Journal of Fluid …, 2021 - cambridge.org
Much work has been done to understand the settling dynamics of spherical particles in a
homogeneous and stratified fluid. However, the effects of shape anisotropy on the settling …

A forward reconstruction, holographic method to overcome the lens effect during 3D detection of semi-transparent, non-spherical particles

CW Tai, A Ahmadzadegan, A Ardekani, V Narsimhan - Soft Matter, 2023 - pubs.rsc.org
Suspensions of semi-transparent particles such as polystyrene microparticles are commonly
used as model systems in the study of micro-rheology, biology, and microfluidics …