29 citations · 48 across the 8 of their papers we have counts for
9 papers
Mixing by squirmers in stratified fluids
Vaseem A. Shaik, Gwynn J. Elfring
We find the mixing induced by a small swimming organism in a density stratified fluid. We model the swimmer as a spherical squirmer and quantify mixing through a mixing efficiency…
Swimming efficiency in viscosity gradients
Jiahao Gong, Vaseem A. Shaik, Gwynn J. Elfring
In this note, we study the effect of viscosity gradients on the energy dissipated by the motion of microswimmers and the associated efficiency of that motion. Using spheroidal squi…
Active spheroids in viscosity gradients
Jiahao Gong, Vaseem A. Shaik, Gwynn J. Elfring
In this paper, we explore the hydrodynamics of spheroidal active particles in viscosity gradients. This work provides a more accurate modeling approach, in comparison to spherical…
Densitaxis: Active particle motion in density gradients
Vaseem A. Shaik, Gwynn J. Elfring
Organisms often swim through density stratified fluids. In this Letter, we investigate the dynamics of small active particles swimming in density gradients and report theoretical e…
Confined active matter in external fields
Vaseem A. Shaik, Zhiwei Peng, John F. Brady +1
We analyze a dilute suspension of active particles confined between walls and subjected to fields that can modulate particle speed as well as orientation. Generally, the particle d…
Active particles crossing sharp viscosity gradients
Jiahao Gong, Vaseem A. Shaik, Gwynn J. Elfring
Active particles (living or synthetic) often move through inhomogeneous environments, such as gradients in light, heat or nutrient concentration, that can lead to directed motion (…
On the hydrodynamics of active particles in viscosity gradients
Vaseem A. Shaik, Gwynn J. Elfring
In this work, we analyze the motion of an active particle, modeled as a spherical squirmer, in linearly varying viscosity fields. In general, the presence of a particle will distur…
Towards an analytical description of active microswimmers in clean and in surfactant-covered drops
Alexander R. Sprenger, Vaseem A. Shaik, Arezoo M. Ardekani +6
Geometric confinements are frequently encountered in the biological world and strongly affect the stability, topology, and transport properties of active suspensions in viscous flo…
Wettability Modulated Charge Inversion and Ionic Transport in Nanofuidic Channels
Vaseem Akram Shaik, Aditya Bandopadhyay, Syed Sahil Hossain +1
We unveil the role of substrate wettability on the reversal in the sign of the interfacial charge distribution in a nanochannel in presence of multivalent ions. In sharp contrast t…