From Piotr.Szymczak at fuw.edu.pl Tue May 14 18:12:50 2024 From: Piotr.Szymczak at fuw.edu.pl (Piotr Szymczak) Date: Tue, 14 May 2024 11:12:50 -0500 Subject: [Soft-matter] Soft Matter & Complex Systems Seminar on 17 May 2024 Message-ID: <22af5b2be0e0f9468dc23eb2b1f2ae26@fuw.edu.pl> Dear Soft Matter & Complex Systems Colleagues and Friends, On Friday 17 April 2024 at 9:30 AM at the UW Faculty of Physics (Pasteura 5, Warsaw; room 1.40) we are hosting a seminar during which YEVGEN MELIKHOV (IPPT PAN) will give a talk SEDIMENTATION DYNAMICS AND PHASE DIAGRAM OF ATTRACTING MODES FOR HIGHLY DEFORMABLE FIBERS IN VISCOUS MEDIA ABSTRACT Sedimentation of elastic objects of different shapes in viscous fluids remains an active research topic due to the importance of such phenomena in numerous biological systems and technological processes. However, even the sedimentation of basic objects, such as fibers or loops, can display rich dynamics if structural flexibility is allowed. This study presents a numerical investigation of the sedimentation of a highly elastic fiber under gravity in a very viscous fluid. We employ the bead model and multipole expansion of the Stokes equations, corrected for lubrication that is implemented in the precise Hydromultipole numerical codes. A dimensionless elasto-gravitation number B, which relates the gravitation and bending forces acting on the fiber, and the fiber aspect ratio N are used to describe the fiber's flexibility. The fiber evolution is monitored over an extended period to identify the attracting modes by systematically varying B and N in a wide range. An analysis of the characteristic features, such as characteristic time scales and fiber deformation patterns, of all the identified attracting modes is presented. The created phase diagram of these modes clearly illustrates that the existence of each mode depends not only on the elasto-gravitation number B but also on the fiber's aspect ratio N. 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 Marek Trippenbach _______________________________________________ Soft-matter mailing list Soft-matter at fuw.edu.pl http://tempulin.fuw.edu.pl/mailman/listinfo/soft-matter [1] Links: ------ [1] http://tempulin.fuw.edu.pl/mailman/listinfo/soft-matter -------------- next part -------------- An HTML attachment was scrubbed... URL: From Piotr.Szymczak at fuw.edu.pl Wed May 22 19:48:48 2024 From: Piotr.Szymczak at fuw.edu.pl (Piotr Szymczak) Date: Wed, 22 May 2024 19:48:48 +0200 Subject: [Soft-matter] Soft Matter & Complex Systems Seminar on 24 May 2024 Message-ID: <50332951e4c5e1a6bcedd2eba2def49c@fuw.edu.pl> Dear Soft Matter & Complex Systems Colleagues and Friends, On Friday 24 April 2024 at 9:30 AM at the UW Faculty of Physics (Pasteura 5, Warsaw; room 1.40) we are hosting a seminar during which Maciej ?ebek (IFT UW) will give a talk Navier-Stokes equations for nearly integrable quantum gases Abstract Hydrodynamics is an effective theory which describes non-equilibrium dynamics at large scales of space and time. The famous Navier-Stokes equations have a universal form and the microscopic details of the model enter only through transport coefficients, which are non-trivial to calculate. In my talk, I will recall classic results from kinetic theory regarding derivation of Navier-Stokes equations and calculation of transport coefficients for weakly interacting classical gas. Then, I will show that these methods can be generalized to the case of nearly integrable quantum gases, which are strongly correlated. Our solution builds on the exactly known thermodynamics and hydrodynamics of integrable systems and can be understood as a perturbation theory around interacting, integrable theories. 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 Marek Trippenbach _______________________________________________ Soft-matter mailing list Soft-matter at fuw.edu.pl http://tempulin.fuw.edu.pl/mailman/listinfo/soft-matter