Research Unit FOR 2688 Instabilities, Bifurcations and Migration in Pulsating Flow
Recent publications of the Research Unit
M. Wouters, O. Aouane, M. Sega, and J. Harting Lattice Boltzmann simulations of drying suspensions of soft particles Philos. Trans. R. Soc. A Math. Phys. Eng. Sci. , 2021, 379, 20200399
Snapshot of a simulation of 4806 particles.
Evgeny S. Asmolov, Tatiana V. Nizkaya1, Jens Harting, and Olga I. Vinogradova Instability of particle inertial migration in shear flow Phys. Fluids , 2021, 33, 092008
Sketch of the particle motion in a shear flow.
Daniel Feldmann, Daniel Morón, and Marc Avila Spatiotemporal Intermittency in Pulsatile Pipe Flow Entropy, 2021, 23, 46
Instantaneous representation of localised turbulent structures in a pulsatile pipe flow.
Steffen M. Recktenwald, Christian Wagner, and Thomas John Optimizing pressure-driven pulsatile flows in microfluidic devices Lab Chip, 2021, 14, 4680-4687
Schematic representation of the microfluidic setup and the effect of the optimization approach.
Pascal Corso, Jonas Walheim, Hannes Dillinger, George Giannakopoulos, Utku Gülan, Christos Emmanouil Frouzakis, Sebastian Kozerke, and Markus Holzner Toward an accurate estimation of wall shear stress from 4D flow magnetic resonance downstream of a severe stenosis Magn Reson Med., 2021, 00, 1– 13
Magnitude of wall shear stress from the posterior view.
Othmane Aouane, Andrea Scagliarini, and Jens Harting Structure and rheology of suspensions of spherical strain-hardening capsules J. Fluid Mech., 2021, 911, A11
Relative viscosity as a function of the effective volume fraction. The dashed and dotted lines corresponds to fits of the numerical data.
François Yaya, Johannes Römer, Achim Guckenberger, Thomas John, Stephan Gekle, Thomas Podgorski, and Christian Wagner Vortical Flow Structures Induced by Red Blood Cells in Capillaries Microcirculation, 2021, e12693
3D view showing the provenance (blue arrow) of the tracers and their trajectories for a cell velocity of 2.2 mm/.
Alexander Kihm, Stephan Quint, Matthias W. Laschke, Michael D. Menger, Thomas John, Lars Kaestner, and Christian Wagner Lingering Dynamics in Microvascular Blood Flow Biophysj, 2021, 4, 1-8
Probability density functions of scaled void durations for all branches if only lingering events are taken into account. The inset graph shows both the probability densities in the case of lingering and nonlingering, respectively to represent extreme cases of the median shift.
Duo Xu, Baofang Song, and Marc Avila Non-modal transient growth of disturbances in pulsatile and oscillatory pipe flows J. Fluid Mech., 2021, 907, R5
Contours of stream-wise vorticity (on an r-θ cross-section) of the helical disturbance at t0/T = 0.5.
Maarten Wouters, Othmane Aouane, Marcello Sega, and Jens Harting Capillary interactions between soft capsules protruding through thin fluid films Soft Matter, 2020, 16, 10910–10920
Time evolution of the gap between two soft particles: (solid line) β = 10, (dashed line) β = 25, (dot-dashed line) β = 50. The grey area indicates the repulsive region.
Moritz Lehmann, Sebastian Johannes Müller, and Stephan Gekle Efficient viscosity contrast calculation for blood flow simulations using the lattice Boltzmann method Int. J. Numer. Methods Fluids, 2020, 92, 1463–1477
The center of mass radial displacement averaged over the last 0.2 seconds for different values of 𝜆.
Duo Xu, Matthias Heil, Thomas Seeböck, and Marc Avila Resonances in Pulsatile Channel Flow with an Elastic Wall Phys. Rev. Lett., 2020, 125, 254501
(a),(b) Sketch of the model. (c) Oscillation amplitude, where the solid and the dashed lines denote the viscous and the inviscid prediction, and black and blue correspond to β = 0.25 and β = 0. The black symbols show the results from the simulations. The dotted lines mark the corresponding eigenfrequencies.
Tatiana V. Nizkaya, Evgeny S. Asmolov, Jens Harting, and Olga I. Vinogradova Inertial migration of neutrally buoyant particles in superhydrophobic channels Phys. Rev. Fluids, 2020, 5, 014201
Sketch of the system: side (a) and top (b) views, with a schematic of vertical and transverse migration.
Tatiana V. Nizkaya1, Anna S. Gekova, Jens Harting, Evgeny S. Asmolov, and Olga I. Vinogradova Inertial migration of oblate spheroids in a plane channel Phys. Fluids, 2020, 32, 112017
An oblate spheroid orienting in a pressure-driven flow to perform a stable log-rolling state.
Duo Xu, Atul Varshney, Xingyu Ma, Baofang Song, Michael Riedl, Marc Avila, and Björn Hof Nonlinear hydrodynamic instability and turbulence in pulsatile flow PNAS, 2020, 117, 21, 11233–11239
Visualization of the numerical simulation of a turbulent blood stream.
Asena Abay, Steffen M. Recktenwald, Thomas John, Lars Kaestner, and Christian Wagner Cross-sectional focusing of red blood cells in a constricted microfluidic channel Soft Matter, 2020,16, 534-543
Schematic representation of red blood cells flowing through a contraction–expansion microfluidic device.
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