Soft Matter and Complex Systems Seminar
sala 1.40, ul. Pasteura 5
2023-06-02 (09:30) 
Małgorzata Przerwa, Russell Kajouri, Soheil Arbabi (IFT UW)
Student Talks
Małgorzata Przerwa (FUW)
Sedimentation of mass-asymmetric dumbbells in Stokes flow.
We investigate the dynamics of a mass-asymmetric dumbbells sedimentation in a low Reynolds number regime, in a pseudo-2D environment. We numerically and analytically predict the motion, and compare the trajectories to experimental data.
Russell Kajouri (IF PAN)
Anti-durotaxis motion onto Gradient Brushes Without External Energy Supply
Durotaxis motion usually takes place from softer to stiffer parts of a substrate with stiffness gradient, as has been demonstrated in the case of cell motion on cancer tissues in the context of biology, or more recently for droplets on gradient brush substrates (https://doi.org/10.1021/acs.langmuir.2c03381). In this presentation, we will demonstrate a new brush substrate design with stiffness gradient, which is able to sustain anti-dutoraxis motion, that is cause the motion of a fluid from its stiffer to its softer parts of the brush substrate. For this case, we will present the influence of the various, key system parameters and the underlying mechanism of the fluid motion.
Soheil Arbabi (IF PAN)
Coalescence of surfactant-laden droplets
Droplet coalescence is commonly encountered in nature and is also relevant for various technologies, such as inkjet printing. In this presentation, we present our results on the coalescence ofsurfactant-laden water droplets, which have been obtained by means of molecular dynamics simulation of a coarse-grained (CG) force-field. In particular, we will discuss the details of thecoalescence mechanism and the bridge growth dynamics.
Sedimentation of mass-asymmetric dumbbells in Stokes flow.
We investigate the dynamics of a mass-asymmetric dumbbells sedimentation in a low Reynolds number regime, in a pseudo-2D environment. We numerically and analytically predict the motion, and compare the trajectories to experimental data.
Russell Kajouri (IF PAN)
Anti-durotaxis motion onto Gradient Brushes Without External Energy Supply
Durotaxis motion usually takes place from softer to stiffer parts of a substrate with stiffness gradient, as has been demonstrated in the case of cell motion on cancer tissues in the context of biology, or more recently for droplets on gradient brush substrates (https://doi.org/10.1021/acs.langmuir.2c03381). In this presentation, we will demonstrate a new brush substrate design with stiffness gradient, which is able to sustain anti-dutoraxis motion, that is cause the motion of a fluid from its stiffer to its softer parts of the brush substrate. For this case, we will present the influence of the various, key system parameters and the underlying mechanism of the fluid motion.
Soheil Arbabi (IF PAN)
Coalescence of surfactant-laden droplets
Droplet coalescence is commonly encountered in nature and is also relevant for various technologies, such as inkjet printing. In this presentation, we present our results on the coalescence ofsurfactant-laden water droplets, which have been obtained by means of molecular dynamics simulation of a coarse-grained (CG) force-field. In particular, we will discuss the details of thecoalescence mechanism and the bridge growth dynamics.