44 citations · 159 across the 15 of their papers we have counts for
16 papers
Evaporation-Induced Pattern Formation and Wetting in Active Microtubule-Kinesin Droplets
Vahid Nasirimarekani, Mehrana R. Nejad, Olinka Ramírez-Soto +4
Active networks composed of biopolymers and motor proteins provide versatile biomimetic systems that have advanced active matter physics and deepened our understanding of cytoskele…
Collective synchrony in confluent, pulsatile epithelia
Wenhui Tang, Mehrana R. Nejad, Adrian F. Pegoraro +2
Collective cell migration lies at the intersection of developmental biology and non-equilibrium physics, where active processes give rise to emergent patterns that are biologically…
Thin active nematohydrodynamic layers: asymptotic theories and instabilities
Mehrana R. Nejad, L. Mahadevan
Starting from a three-dimensional description of an active nematic layer, we employ an asymptotic theory to derive a series of low-dimensional continuum models that capture the cou…
Coarse-graining dense, deformable active particles
Mehrana R. Nejad, Julia M Yeomans
We coarse-grain a model of closely-packed ellipses that can vary their aspect ratio to derive continuum equations for materials comprising confluent deformable particles such as ep…
Cellular dynamics emerging from turbulent flows steered by active filaments
Mehrana R. Nejad, Julia M. Yeomans, Sumesh P Thampi
We develop a continuum theory to describe the collective dynamics of deformable epithelial cells, using two tensor order parameters to distinguish the force-generating active filam…
Stress-shape misalignment in confluent cell layers
Mehrana R. Nejad, Liam J. Ruske, Molly McCord +4
This study investigates the relationship between cell shape and cell-generated stresses in confluent cell layers. Using simultaneous measurements of cell shape orientation and cell…
Spontaneous rotation of active droplets in two and three dimensions
Mehrana R. Nejad, Julia M. Yeomans
We use numerical simulations and linear stability analysis to study active nematic droplets, in the regime where the passive phase is isotropic. We show that activity leads to the…
Collective rotational motion of freely-expanding T84 epithelial cell colonies
Flora Ascione, Sergio Caserta, Speranza Esposito +6
Coordinated rotational motion is an intriguing, yet still elusive mode of collective cell migration, which is relevant in pathological and morphogenetic processes. Most of the stud…
Geometrical control of interface patterning underlies active matter invasion
Haoran Xu, Mehrana R. Nejad, Julia M. Yeomans +1
Interaction between active materials and the boundaries of geometrical confinement is key to many emergent phenomena in active systems. For living active matter consisting of anima…
Quadrupolar active stress induces exotic phases of defect motion in active nematics
Salik A. Sultan, Mehrana R. Nejad, Amin Doostmohammadi
A wide range of living and artificial active matter exists in close contact with substrates and under strong confinement, where in addition to dipolar active stresses, quadrupolar…
Active extensile stress promotes 3D director orientations and flows
Mehrana R. Nejad, Julia M. Yeomans
We use numerical simulations and linear stability analysis to study an active nematic layer where the director is allowed to point out of the plane. Our results highlight the diffe…
Memory effects, arches and polar defect ordering at the cross-over from wet to dry active nematics
Mehrana Raeisian Nejad, Amin Doostmohammadi, Julia Mary Yeomans
We use analytic arguments and numerical solutions of the continuum, active nematohydrodynamic equations to study how friction alters the behaviour of active nematics. Concentrating…
Role of friction in multidefect ordering
Kristian Thijssen, Mehrana R. Nejad, Julia M. Yeomans
We use continuum simulations to study the impact of friction on the ordering of defects in an active nematic. Even in a frictionless system, +1/2 defects tend to align side-by-side…
Activity induced nematic order in isotropic liquid crystals
Sreejith Santhosh, Mehrana R. Nejad, Amin Doostmohammadi +2
We use linear stability analysis to show that an isotropic phase of elongated particles with dipolar flow fields can develop nematic order as a result of their activity. We argue t…
Interplay of quenching temperature and drift in Brownian dynamics
Hamid Khalilian, Mehrana R. Nejad, Ali G. Moghaddam +1
We investigate the non-equilibrium evolution of ideal Brownian particles confined between two walls, following simultaneous quenches of the temperature and a constant external forc…
Self-generated gradients stabilize the hydrodynamic instabilities in active suspensions
Mehrana R. Nejad, Ali Najafi
Ordered phases emerged in active suspensions of polar swimmers are under long-wavelength hydrodynamic mediated instabilities. In this letter, we show that chemical molecules dissol…