Soft Matter and Complex Systems Seminar
sala 1.40, ul. Pasteura 5
2023-04-14 (09:30) 
Russell Kajouri, Soheil Arbabi, Luis Carnevale (IF PAN)
1. Unidirectional Droplet Propulsion onto Gradient Brushes Without External Energy Supply 2. Coalescence of surfactant-laden droplets 3.Liquid thread breakup and the formation of satellite droplets
1) Russell Kajouri
Title: Unidirectional Droplet Propulsion onto Gradient Brushes Without External Energy Supply
Durotaxis motion due to stiffness gradient is a process in which an agent, e.g.. a droplet or a cell, exhibits a unidirectional movement without consuming the energy of an external source. In our recent research, we describe the possibility of durotaxis motion of polymer-brush substrates and its dependence on various parameters. We also explain the mechanism of this phenomenon.
2) Soheil Arbabi
Title: 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.
3) Luis Carnevale
Title: Liquid thread breakup and the formation of satellite droplets
The breakup of liquid threads into smaller droplets is a fundamental problem in fluid dynamics. Here, we estimate the characteristic wavelength of the breakup process by means of many-body dissipative particle dynamics and discuss the power-law dependence of the number of satellite droplets as a function of the Ohnesorge and thermal capillary number. We also elucidate the breakup mechanism and the conditions under satellite droplets form.
Title: Unidirectional Droplet Propulsion onto Gradient Brushes Without External Energy Supply
Durotaxis motion due to stiffness gradient is a process in which an agent, e.g.. a droplet or a cell, exhibits a unidirectional movement without consuming the energy of an external source. In our recent research, we describe the possibility of durotaxis motion of polymer-brush substrates and its dependence on various parameters. We also explain the mechanism of this phenomenon.
2) Soheil Arbabi
Title: 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.
3) Luis Carnevale
Title: Liquid thread breakup and the formation of satellite droplets
The breakup of liquid threads into smaller droplets is a fundamental problem in fluid dynamics. Here, we estimate the characteristic wavelength of the breakup process by means of many-body dissipative particle dynamics and discuss the power-law dependence of the number of satellite droplets as a function of the Ohnesorge and thermal capillary number. We also elucidate the breakup mechanism and the conditions under satellite droplets form.