This file was created by the TYPO3 extension
bib
--- Timezone: CEST
Creation date: 2022-08-17
Creation time: 18-43-44
--- Number of references
14
article
WorlitzerABSB2021
Motility-induced clustering and meso-scale turbulence in active polar fluids
New Journal of Physics
2021
3
10
23
033012
8.4,8.41,ActFluid
10.1088/1367-2630/abe72d
V MWorlitzer
GAriel
ABe'er
HStark
MBär
SHeidenreich
article
ReinkenNHSBKA2020
Organizing bacterial vortex lattices by periodic obstacle arrays
Commun Phys
2020
5
7
3
76
8.4,8.41,ActFluid
10.1038/s42005-020-0337-z
HReinken
DNishiguchi
SHeidenreich
ASokolov
MBär
S H LKlapp
I SAranson
article
BeaerIGKHBA2020
A phase diagram for bacterial swarming
Commun Phys
2020
4
3
3
66
8.4,8.41,ActFluid
10.1038/s42005-020-0327-1
ABe´er
BIlkanaiv
RGross
D BKearns
SHeidenreich
MBär
GAriel
article
BarGHP2020
Self-Propelled Rods: Insights and Perspectives for Active Matter
Annual Review of Condensed Matter Physics
2020
3
1
11
441--466
8.4,8.41,ActFluid
10.1146/annurev-conmatphys-031119-050611
MBär
RGroßmann
SHeidenreich
FPeruani
article
HeidenreichDKB2016
Hydrodynamic length-scale selection in microswimmer suspensions
Physical Review E
2016
8
29
94
2
020601
8.4,8.41,ActFluid
10.1103/PhysRevE.94.020601
SHeidenreich
JDunkel
H.LKlapp
MBär
article
Alonso_PhysD_2015
Oscillations and uniaxial mechanochemical waves in a model of an active poroelastic medium: Application to deformation patterns in protoplasmic droplets of Physarum polycephalum
Physica D
2016
4
1
318
58-69
8.41, Spatio-Diff, ActFluid
10.1016/j.physd.2015.09.017
SAlonso
UStrachauer
MRadszuweit
MBär
M.J.BHauser
article
SH
Generalized Swift-Hohenberg models for dense active suspensions
Eur. Phys. J. E
2016
39
10
97
8.4,8.41,ActFluid
10.1140/epje/i2016-16097-2
AUOza
SHeidenreich
JDunkel
article
Radszuweit2014
An active poroelastic model for mechanochemical patterns in protoplasmic droplets of Physarum polycephalum
PloS one
2014
9
6
e99220
Motivated by recent experimental studies, we derive and analyze a two-dimensional model for the contraction patterns observed in protoplasmic droplets of Physarum polycephalum. The model couples a description of an active poroelastic two-phase medium with equations describing the spatiotemporal dynamics of the intracellular free calcium concentration. The poroelastic medium is assumed to consist of an active viscoelastic solid representing the cytoskeleton and a viscous fluid describing the cytosol. The equations for the poroelastic medium are obtained from continuum force balance and include the relevant mechanical fields and an incompressibility condition for the two-phase medium. The reaction-diffusion equations for the calcium dynamics in the protoplasm of Physarum are extended by advective transport due to the flow of the cytosol generated by mechanical stress. Moreover, we assume that the active tension in the solid cytoskeleton is regulated by the calcium concentration in the fluid phase at the same location, which introduces a mechanochemical coupling. A linear stability analysis of the homogeneous state without deformation and cytosolic flows exhibits an oscillatory Turing instability for a large enough mechanochemical coupling strength. Numerical simulations of the model equations reproduce a large variety of wave patterns, including traveling and standing waves, turbulent patterns, rotating spirals and antiphase oscillations in line with experimental observations of contraction patterns in the protoplasmic droplets.
,Biological,Biomechanical Phenomena,Calcium,Calcium: metabolism,Cytoplasm,Cytoplasm: physiology,Cytoskeleton,Cytoskeleton: physiology,Elasticity,Mechanical,Models,Physarum polycephalum,Physarum polycephalum: cytology,Physarum polycephalum: physiology,Stress,pattern formation
8.41, ActMatter, ActFluid
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0099220
Public Library of Science
1932-6203
10.1371/journal.pone.0099220
MRadszuweit
HEngel
MBär
article
Heidenreich2014
Numerical simulations of a minimal model for the fluid dynamics of dense bacterial suspensions
J.Phys.: Conf. Ser.
2014
490
1
012126
8.41,fluid dynamics
8.41, ActFluid
http://iopscience.iop.org/article/10.1088/1742-6596/490/1/012126
IOP Publishing
en
1742-6596
10.1088/1742-6596/490/1/012126
SHeidenreich
S H LKlapp
MBär
article
Heiden_PRL2013
Fluid Dynamics of Bacterial Turbulence
Phys. Rev. Lett.
2013
110
228102
8.41, ActFluid
10.1103/PhysRevLett.110.228102
JDunkel
SHeidenreich
KDrescher
H. HWensink
MBär
R. EGoldstein
article
Radszuweit2013
Intracellular mechanochemical waves in an active poroelastic model
Phys. Rev. Lett.
2013
110
13
138102
Many processes in living cells are controlled by biochemical substances regulating active stresses. The cytoplasm is an active material with both viscoelastic and liquid properties. We incorporate the active stress into a two-phase model of the cytoplasm which accounts for the spatiotemporal dynamics of the cytoskeleton and the cytosol. The cytoskeleton is described as a solid matrix that together with the cytosol as an interstitial fluid constitutes a poroelastic material. We find different forms of mechanochemical waves including traveling, standing, and rotating waves by employing linear stability analysis and numerical simulations in one and two spatial dimensions.
Biological,Biomechanical Phenomena,Cell Physiological Phenomena,Cytoplasm,Cytoplasm: chemistry,Cytoskeleton,Cytoskeleton: chemistry,Elasticity,Extracellular Fluid,Extracellular Fluid: chemistry,Models,Viscosity
8.41, ActMatt, ActFluid
http://www.ncbi.nlm.nih.gov/pubmed/23581377
1079-7114
10.1103/PhysRevLett.110.138102
MRadszuweit
S.Alonso
HEngel
MBär
article
Dunkel2013
Minimal continuum theories of structure formation in dense active fluids
New J. Phys.
2013
15
4
045016
8.41, ActFluid
http://iopscience.iop.org/article/10.1088/1367-2630/15/4/045016
IOP Publishing
en
1367-2630
10.1088/1367-2630/15/4/045016
JDunkel
SHeidenreich
MBär
R EGoldstein
article
Wensink2012
Meso-scale turbulence in living fluids
Proc. Natl. Acad. Sci. U.S.A.
2012
109
36
14308--13
Turbulence is ubiquitous, from oceanic currents to small-scale biological and quantum systems. Self-sustained turbulent motion in microbial suspensions presents an intriguing example of collective dynamical behavior among the simplest forms of life and is important for fluid mixing and molecular transport on the microscale. The mathematical characterization of turbulence phenomena in active nonequilibrium fluids proves even more difficult than for conventional liquids or gases. It is not known which features of turbulent phases in living matter are universal or system-specific or which generalizations of the Navier-Stokes equations are able to describe them adequately. Here, we combine experiments, particle simulations, and continuum theory to identify the statistical properties of self-sustained meso-scale turbulence in active systems. To study how dimensionality and boundary conditions affect collective bacterial dynamics, we measured energy spectra and structure functions in dense Bacillus subtilis suspensions in quasi-2D and 3D geometries. Our experimental results for the bacterial flow statistics agree well with predictions from a minimal model for self-propelled rods, suggesting that at high concentrations the collective motion of the bacteria is dominated by short-range interactions. To provide a basis for future theoretical studies, we propose a minimal continuum model for incompressible bacterial flow. A detailed numerical analysis of the 2D case shows that this theory can reproduce many of the experimentally observed features of self-sustained active turbulence.
Bacillus subtilis,Bacillus subtilis: physiology,Biological,Biomechanical Phenomena,Computer Simulation,Culture Media,Culture Media: chemistry,Hydrodynamics,Models,Movement,Movement: physiology
8.41, ActFluid
http://www.pnas.org/content/109/36/14308
1091-6490
10.1073/pnas.1202032109
H HWensink
JDunkel
SHeidenreich
KDrescher
R EGoldstein
HLöwen
J MYeomans
article
Radszuweit2011
A model for oscillations and pattern formation in protoplasmic droplets of Physarum polycephalum
Eur. Phys. J. - Special Topics
2010
191
1
159--172
8.41,pattern formation
8.41, ActMatter, ActFluid
http://www.springerlink.com/index/10.1140/epjst/e2010-01348-2
1951-6355
10.1140/epjst/e2010-01348-2
MRadszuweit
HEngel
MBär