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Wydział Matematyki, Informatyki i Mechaniki Uniwersytetu Warszawskiego

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Seminarium Zakładu Równań Fizyki Matematycznej

Cotygodniowe seminarium badawcze




Lista referatów

  • 2020-10-15, godz. 12:30, Zoom

    Gustavo Abade (Instytut Geofizyki FUW UW)

    Turbulent clustering of low-inertia droplets

    Several effects of turbulence may reduce the time for rain initiation in warm (ice-free) atmospheric clouds. This talk overviews the effect of turbulent clustering of inertial droplets that interact hydrodynamically. Using the so-called drift-diffusion model (based on the Master ...

  • 2020-03-12, godz. 12:30, 5070

    Jakub Gałecki (Politechnika Warszawska)

    Adjoint-Based Optimal Control of Incompressible Flows with Energy-Stable Boundary Conditions

    Problems arising in computational fluid dynamics often require artificially truncating the domain and posing appropriate open boundary conditions. However, these are known to suffer from backflow instability – when the flow at the boundary reverses, the simulation can blow up altoge...

  • 2020-03-05, godz. 12:30, 5070

    prof. Wojciech Zajączkowski (IMPAN)

    The Ladyzhenskaya-Serrin condition for regular solutions of the Navier-Stokes eguations

  • 2020-01-23, godz. 12:30, 5070

    Wojciech Górny (doktorant MIM)

    Structure of solutions to the least gradient problem

    In the least gradient problem with discontinuous boundary  data, the solutions may fail to be unique. However, they often share a  similar structure. In this talk, I will discuss the geometrical  reasons for this phenomenon, with a particular focus on anisotropic  cases. ...

  • 2020-01-16, godz. 12:30, 5070

    Piotr Kokocki (UMK Toruń)

    Total integrals of solutions for inhomogeneous Painlevé II equation

    We establish a formula determining the value of the Cauchy integrals for the real and purely imaginary Ablowitz-Segur solutions for the inhomogeneous second Painlevé equation. Our approach relies on the Deift-Zhou steepest descent analysis of the corresponding Riemann-Hilbert proble...

  • 2019-12-19, godz. 12:30, 5070

    dr Maciej Lisicki (Wydzial Fizyki UW)

    Pumping and swimming: two faces of phoretic flows

    Janus particles with the ability to move phoretically in self-generated chemical concentration gradients are model systems for active matter. On the other hand, chemically active surfaces can lead to microscale flow generation, bacoming an effective pumping mechanism in inertia-less small-scale flow...

  • 2019-12-05, godz. 12:30, 5070

    Łukasz Chomienia (doktorant MIM)

    Energy conservation for the compressible Euler system

    We prove the local energy equality for the isentropic compressible Euler equations under the assumption of the Besov regularity in space and the Bochner integrability in time. We show that this result can be established in a certain class of exponents determining the regularity. We also use t...

  • 2019-11-28, godz. 12:30, 5070

    Jakub Siemianowski (UMK Toruń)

    Systems of elliptic PDEs on R^N

    We consider the system of second-order elliptic equations with the nonlinear term depending on the solution and its first-order derivatives on whole R^N. In order to solve it, firstly, we investigate auxiliary systems on large balls B_n. Then, by suitable estimates and the so-called tail est...

  • 2019-11-21, godz. 12:30, 5070

    Piotr Kalita (UJ)

    Rigorous numerical integration of PDEs by means of Finite Element Method

    I will present the results on the attractor structure for problems governed by PDEs. I will demonstrate that the approach based on rigorous numerical simulations and Finite Element Method makes it possible to find the trajectories in the global attractor. As an example I will present the proof of...

  • 2019-11-14, godz. 12:30, 5070

    Grzegorz Łukaszewicz (MIM)

    An analogy between electromagnetism and hydrodynamics. Maxwell and Euler equations.

    Analogy is a powerful tool of discovery. James Clerk Maxwell, in particular, used certain analogies between hydrodynamics and electromagnetism to better understand the nature of the electromagnetic field.   In this talk I shall present a formal analogy between Euler equations expressed in n...