From Maciej.Lisicki at fuw.edu.pl Mon Mar 3 11:31:07 2025 From: Maciej.Lisicki at fuw.edu.pl (Maciej Lisicki) Date: Mon, 3 Mar 2025 11:31:07 +0100 Subject: [Soft-matter] Soft Matter & Complex Systems Seminar on 7 Mar 2025 Message-ID: <8EF0439A-BA6E-4433-A99B-1080D9EFB7E8@fuw.edu.pl> Dear Soft Matter & Complex Systems Colleagues and Friends, On Friday 7 March 2025 at 9:30 AM at the UW Faculty of Physics (Pasteura 5, Warsaw; room 1.40) we are hosting a seminar during which King Ng (Institute of Physics, Polish Academy of Sciences) will give a talk Liquid droplet oscillations on a vibrating substrate Abstract We study the oscillations of liquid droplets on substrates in macroscopic scale using Many-body Dissipative Particle Dynamics (MDPD). In this study, we focus on the harmonic droplet oscillations which are induced by sinusoidal forcing from horizonal substrate vibrations in one-dimension. Our investigation examines the topological changes of the droplet in various sizes and oscillation modes, considering different vibration frequencies and amplitudes. We also explore the role of the droplet's natural oscillation mode. Additionally, we demonstrate the effect of surface wettability on droplet oscillations, ranging from hydrophilic to hydrophobic surfaces, by parametrically tuning the equilibrium contact angles. Our MDPD simulations are compared with experimental results. This approach aims to optimize systems involving droplet movement driven by vibrating substrates. We warmly welcome everyone to attend the talk and the Soft Matter Coffee Break after the seminar, held in room 2.63 (2nd floor). Maria Ekiel-Je?ewska Maciej Lisicki Piotr Szymczak Panagiotis Theodorakis -------------- next part -------------- An HTML attachment was scrubbed... URL: From Maciej.Lisicki at fuw.edu.pl Thu Mar 13 07:53:07 2025 From: Maciej.Lisicki at fuw.edu.pl (Maciej Lisicki) Date: Thu, 13 Mar 2025 07:53:07 +0100 Subject: [Soft-matter] No Soft Matter & Complex Systems Seminar on 14 Mar 2025 Message-ID: <0460EA59-9BD4-4353-B6CE-2A647982A79A@fuw.edu.pl> Dear Soft Matter & Complex Systems Colleagues and Friends, There will be no seminar on Friday 14 March 2025. The next seminar will take place on 21 March 2025 at 9:30, with more details to follow in the next email. Maria Ekiel-Je?ewska Maciej Lisicki Piotr Szymczak Panagiotis Theodorakis -------------- next part -------------- An HTML attachment was scrubbed... URL: From panos at ifpan.edu.pl Sun Mar 16 16:27:02 2025 From: panos at ifpan.edu.pl (Panagiotis Theodorakis) Date: Sun, 16 Mar 2025 16:27:02 +0100 Subject: [Soft-matter] Prof Alidad Amirfazli - York University Toronto - IF PAN Colloquium - Tuesday, March 18, 15:15, online ZOOM Message-ID: <82e7eccf704dcd4e3f2cf7bbf093358d@ifpan.edu.pl> Dear all, I am kindly bringing to your attention the seminar given at IP PAS colloquium on ZOOM by Prof. Alidad Amirfazli (York University, Canada). The title of his talk is 'Evaporation of sessile droplets: From Theory to experiments'. The IP PAS colloquium will take place on Tuesday, March 18 at 15:15 CET (Warsaw time). For further details and how to connect on Zoom, please, I am attaching the message below. Kind regards, Panos --------------------------- Ladies and Gentlemen, It is my great pleasure to invite you to the IP PAS Colloquium: "Evaporation of Sessile Droplets: From Theory to Experiments" Professor Alidad Amirfazli, Department of Mechanical Engineering, York University, Toronto, Canada, on March 18th, 2025 at 15:15 Abstract This talk is about how small liquid droplets placed on a surface evaporate and why understanding this process is important for application like cooling systems and inkjet printing. We study the evaporation process by developing, a simple yet accurate mathematical model called the Point Source Model (PSM). By applying the PSM approach, instead of tracking complex details like how the liquid surface moves or how mass transfers, PSM uses a mathematical shortcut to predict how fast droplets evaporate, how vapor spreads around them, and how the surface they sit on affects evaporation. The model was tested with experiments and matched well with observed results for different droplet sizes, humidity levels, and surface types. It also helped determine how close two droplets need to be before they start affecting each other's evaporation. Beyond simple evaporation, the talk explores how heating the surface beneath the droplets changes the evaporation behavior of sessile droplets. At low temperatures, evaporation is mainly due to diffusion (random spreading of molecules). But as the surface gets hotter, vapor flow (natural convection) starts playing a larger role. The model accurately predicts when this shift happens. If time allows, the talk will also touch on how evaporation works when three droplets interact, using a correction factor to account for their positions. The findings are useful for improving technologies that rely on precise droplet control, such as inkjet printers, medical tests, and cooling systems. The Zoom platform will be used for this event. ------------------------------------------------------------------------ IP PAS Colloquium is inviting you to a scheduled Zoom meeting. Topic: Evaporation of Sessile Droplets: From Theory to Experiments Time: March 18, 2025 15:15 Warsaw Do??cz do spotkania Zoom https://zoom.us/j/98855022584?pwd=oB8DEZJqd9VwUUrYUUXAkqbybJyYBu.1 [1] Identyfikator spotkania: 988 5502 2584 Kod dost?pu: 145612 --- Wystarczy jedno stukni?cie na urz?dzeniu mobilnym +48223073488,,98855022584#,,,,*145612# Polska +48223987356,,98855022584#,,,,*145612# Polska --- Wybierz numer wed?ug swojej lokalizacji * +48 22 307 3488 Polska * +48 22 398 7356 Polska * +48 22 306 5342 Polska Identyfikator spotkania: 988 5502 2584 Kod dost?pu: 145612 ----------------------------------------------------------------------- With best regards, Leszek Sirko Chairman of the Colloquium https://www.ifpan.edu.pl/en/ip-pas-seminars/institute-of-physics-colloquium.html [2] ************************************** Prof. dr hab. Leszek Sirko Institute of Physics Polish Academy of Sciences Al. Lotnik?w 32/46 02-668 Warszawa Poland Tel: +48 22 1163385 Fax: +48 22 8430927 ************************************** Links: ------ [1] https://zoom.us/j/98855022584?pwd=oB8DEZJqd9VwUUrYUUXAkqbybJyYBu.1 [2] https://www.ifpan.edu.pl/en/ip-pas-seminars/institute-of-physics-colloquium.html -------------- next part -------------- An HTML attachment was scrubbed... URL: From Maciej.Lisicki at fuw.edu.pl Tue Mar 18 06:48:06 2025 From: Maciej.Lisicki at fuw.edu.pl (Maciej Lisicki) Date: Tue, 18 Mar 2025 07:48:06 +0200 Subject: [Soft-matter] Soft Matter & Complex Systems Seminar on 21 Mar 2025 Message-ID: <1F8B9076-3B42-4E6D-B787-57952B51A4F5@fuw.edu.pl> Dear Soft Matter & Complex Systems Colleagues and Friends, On Friday 21 March 2025 at 9:30 AM at the UW Faculty of Physics (Pasteura 5, Warsaw; room 1.40) we are hosting a seminar during which Pawe? D?otko (IM PAN) will give a talk Topology in material physics Abstract There is a strong connection between the structure and function of porous materials. Various properties, such as mechanical resistance, thermal conductivity, and more, are influenced not only by material?s composition but also by the shape of the porous structure of the material. In this talk, I will introduce several shape characteristics developed by my group and demonstrate how they can be use to analyze porous structures. In particular, I will discuss how the language of topology can be used to formalize certain physical properties, particularly in the context of sponge versus foam structures. Additionally, I will present examples of how topology can be used to study phase separations and transitions, constructing material landscapes, and expediting the synthesis of new materials. We warmly welcome everyone to attend the talk and the Soft Matter Coffee Break after the seminar, held in room 2.63 (2nd floor). Maria Ekiel-Je?ewska Maciej Lisicki Piotr Szymczak Panagiotis Theodorakis -------------- next part -------------- An HTML attachment was scrubbed... URL: From Maciej.Lisicki at fuw.edu.pl Mon Mar 24 19:42:35 2025 From: Maciej.Lisicki at fuw.edu.pl (Maciej Lisicki) Date: Mon, 24 Mar 2025 19:42:35 +0100 Subject: [Soft-matter] Soft Matter & Complex Systems Seminar on 28 Mar 2025 Message-ID: Dear Soft Matter & Complex Systems Colleagues and Friends, On Friday 28 March 2025 at 9:30 AM at the UW Faculty of Physics (Pasteura 5, Warsaw; room 1.40) we are hosting a seminar during which Jan Turczynowicz (IFT UW) will give a talk Encounter rate in marine snow dynamics Abstract Oceans are vital carbon sinks, absorbing approximately 30% of anthropogenic carbon emissions. A portion of this carbon settles to the seafloor, reducing its presence in the short-term global cycle. The primary drivers of this vertical transport are sinking aggregates of dead phytoplankton, known as marine snow. To predict sedimentation dynamics, it is essential to understand encounters between sinking particles. Collisions between these particles promote aggregation, increasing their sedimentation velocity, while interactions with free-floating bacteria enhance dissolution, potentially slowing their descent. Models for encounter rates involve two dominant mechanisms of particle interception: advection and diffusion. The relative importance of these mechanisms depends on the sizes of the colliding particles. However, many existing studies either neglect one of these processes or simply superimpose them, raising concerns about their accuracy. Here, we present a systematic approach to modeling collision rates as a function of particle size and Peclet number. We warmly welcome everyone to attend the talk and the Soft Matter Coffee Break after the seminar, held in room 2.63 (2nd floor). Maria Ekiel-Je?ewska Maciej Lisicki Piotr Szymczak Panagiotis Theodorakis -------------- next part -------------- An HTML attachment was scrubbed... URL: