172 citations · 497 across the 17 of their papers we have counts for
19 papers
Spontaneous Vortex Instability in Active Nematics
Niels de Graaf Sousa, Kristian Thijssen, Amin Doostmohammadi
One of the defining results in the study of active matter is the spontaneous flow instability, through which a homogeneous, uniformly aligned state breaks translational symmetry al…
How Phase Coexistence affects the mechanical properties of heterogeneous 2D suspensions
Raul Molina-Prados Lallena, Jose Martin-Roca, Kristian Thijssen +3
Although numerical simulations of rheological measurements typically focus on homogeneous systems, heterogeneity can profoundly impact material properties. We report on the rheolog…
Flow Coupling Alters Topological Phase Transition in Nematic Liquid Crystals
Jayeeta Chattopadhyay, Simon Guldager Andersen, Kristian Thijssen +1
We investigate how coupling to fluid flow influences defect-mediated transitions in two-dimensional passive nematic fluids using fluctuating nematohydrodynamic simulations. The sys…
MIPS is a Maxwell fluid with an extended and non-monotonic crossover
José Martín-Roca, Chantal Valeriani, Kristian Thijssen +2
Understanding the mechanical properties of active suspensions is crucial for their potential applications in materials engineering. Among the various phenomena in active matter tha…
Topological kicks enhance colloidal diffusivity in topological turbulence
Timofey Kozhukhov, Benjamin Loewe, Kristian Thijssen +1
Colloidal inclusions in nematic fluids induce topological defects that govern their dynamics. These defects create well-understood rheological behavior in passive nematics, but the…
Active particles knead three-dimensional gels into open crumbs
Martin Cramer Pedersen, Sourav Mukherjee, Amin Doostmohammadi +2
Colloidal gels are prime examples of functional materials exhibiting disordered, amorphous, yet meta-stable forms. They maintain stability through short-range attractive forces and…
Active Darcy's Law
Ryan R. Keogh, Timofey Kozhukhov, Kristian Thijssen +1
While bacterial swarms can exhibit active turbulence in vacant spaces, they naturally inhabit crowded environments. We numerically show that driving disorderly active fluids throug…
Spontaneous Self-Constraint in Active Nematic Flows
Louise C. Head, Claire Dore, Ryan Keogh +5
Active processes drive and guide biological dynamics across scales -- from subcellular cytoskeletal remodelling, through tissue development in embryogenesis, to population-level ba…
Necking and failure of a colloidal gel arm: signatures of yielding on different length scales
Kristian Thijssen, T. B. Liverpool, C. Patrick Royall +1
Colloidal gels consist of percolating networks of interconnected arms. Their mechanical properties depend on the individual arms, and on their collective behaviour. We use numerica…
Perpendicular and Parallel Phase Separation in Two Species Driven Diffusive Lattice Gases
Honghao Yu, Kristian Thijssen, Robert L. Jack
We study three different lattice models in which two species of diffusing particles are driven in opposite directions by an electric field. We focus on dynamical phase transitions…
Activity-induced instabilities of brain organoids
Kristian Thijssen, Guido L. A. Kusters, Amin Doostmohammadi
We present an analytical and numerical investigation of the activity-induced hydrodynamic instabilities in model brain organoids. While several mechanisms have been introduced to e…
Submersed Micropatterned Structures Control Active Nematic Flow, Topology and Concentration
Kristian Thijssen, Dimitrius Khaladj, S. Ali Aghvami +5
Coupling between flows and material properties imbues rheological matter with its wide-ranging applicability, hence the excitement for harnessing the rheology of active fluids for…
Binding self-propelled topological defects in active turbulence
Kristian Thijssen, Amin Doostmohammadi
We report on the emergence of stable self-propelled bound defects in monolayers of active nematics, which form virtual full-integer topological defects in the form of vortices and…
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…
Polar jets of swimming bacteria condensed by a patterned liquid crystal
Taras Turiv, Runa Koizumi, Kristian Thijssen +8
Active matter exhibits remarkable collective behavior in which flows, continuously generated by active particles, are intertwined with the orientational order of these particles. T…
Active nematics with anisotropic friction: the decisive role of the flow aligning parameter
Kristian Thijssen, Luuk Metselaar, Julia M. Yeomans +1
We use continuum simulations to study the impact of anisotropic hydrodynamic friction on the emergent flows of active nematics. We show that, depending on whether the active partic…
Twist-induced crossover from 2D to 3D turbulence in active nematics
Tyler N. Shendruk, Kristian Thijssen, Julia M. Yeomans +1
While studies of active nematics in two dimensions have shed light on various aspects of the flow regimes and topology of active matter, three-dimensional properties of topological…
Dancing disclinations in confined active nematics
Tyler N. Shendruk, Amin Doostmohammadi, Kristian Thijssen +1
The spontaneous emergence of collective flows is a generic property of active fluids and often leads to chaotic flow patterns characterised by swirls, jets, and topological disclin…
Onset of meso-scale turbulence in living fluids
Amin Doostmohammadi, Tyler N. Shendruk, Kristian Thijssen +1
Meso-scale turbulence is an innate phenomenon, distinct from inertial turbulence, that spontaneously occurs at zero-Reynolds number in fluidized biological systems. This spatio-tem…