170 citations · 581 across the 36 of their papers we have counts for
37 papers
Suppression of bacterial rheotaxis in wavy channels
Winfried Schmidt, Igor S. Aranson, Walter Zimmermann
Controlling the swimming behavior of bacteria is crucial, for example, to prevent contamination of ducts and catheters. We show the bacteria modeled by deformable microswimmers can…
On the band-width of stable nonlinear stripe patterns in finite size systems
Mirko Ruppert, Walter Zimmermann
Nonlinear stripe patterns occur in many different systems, from the small scales of biological cells to geological scales as cloud patterns. They all share the universal property o…
Oscillatory, non-progressing flows induce directed cell motion
Winfried Schmidt, Andre Förtsch, Matthias Laumann +1
We present a deformation-dependent propulsion phenomenon for soft particles such as cells in microchannels. It is based on a broken time reversal symmetry generated by a fast forwa…
Periodic patterns displace active phase separation
Frederik J. Thomsen, Lisa Rapp, Fabian Bergmann +1
In this work we identify and investigate a novel bifurcation in conserved systems. This secondary bifurcation stops active phase separation in its nonlinear regime. It is then eith…
Deflection of phototactic microswimmers through obstacle arrays
Marvin Brun-Cosme-Bruny, Andre Förtsch, Walter Zimmermann +3
We study the effect of inhomogeneous environments on the swimming direction of the microalgae \textit{Chlamydomonas Reinhardtii} (CR) in the presence of a light stimulus. Positive…
Focusing and splitting of particle streams in microflows via viscosity gradients
Matthias Laumann, Walter Zimmermann
Microflows are intensively used for investigating and controlling the dynamics of particles, including soft particles such as biological cells and capsules. A classic result is the…