View source for Gels, Polymers, and "active" Colloids

Group leader: [[Patrick Kreissl]]
Members: {{#ask:[[Topical Meeting::gel]]}}

== Schedule ==
The meeting takes place every three weeks on '''Tuesday at 10:30''', if not indicated differently.

=== WS 2018 ===
* '''12.12.2017''' We discussed possible Bachelor topics:
** ampholytic salt between colloids (so big that they are modeled as plate capacitors), Podgornik Project -Jonas
** flow between charge regulated walls with Comsol (not Reaction Ensemble due to Dynamics being destroyed by MC) -Floh, Patrick, Jonas
** Neural Net Topic - Anand
**Bacteria in Porous Geometries, Espresso vs. Walberla - Michael
** Gel with free magnetic particles, magneto-elastic behavior (Alignment of magnetic particles with attractive Lennard Jones interaction?)- Rudolf, Patrick
**Porous nanogel in conical glass nanopore - Kai
**ICC improvements Konrad, Floh
* '''24.10.2017 ''' Jonas: Poisson-Boltzmann Cell Model under Tension, correct treatment and results. Discussed why results for (single chain) PB Cell Model differ from Tobis MD results for gels (see the presentation "/home/jlandsgesell/phd/presentations/Poisson\ Boltzmann\ Cell\ Model\ Progress\ Report\ 24.10.2017.odp"). Agreed on investigating single chain properties further. The optimal cell model where pressures equal on the top and the side was ruled out to be a bad model since it would like swell to infinity in radial direction.

=== SS 2017 ===
* '''9.05.2017''' Kai: Autocorrelation time of confined polymers, Patrick: made COMSOL implementation of Cell Model for taking finite differences (p=-del F(N,V,T)/del V), Jonas: discussed working together with Peters on weak polyelectrolytes in poor solvents and working with Peter on bulk vs. local pH values, David: mobility of weak stars, Michael: Problems with reactive boundary condition and momentum conservation
* '''18.04.2017''' 
** F. Weik: B-spline fit to polymer conformations and error calculation for Eigenvalue problems (both related to Evangelos' project of DNA translocation).
** P. Kreissl: Writing proposal for magnetic gels project together with R. Weeber.
** K. Szuttor: Writing response to paper review (almost done).
** M. Kuron: Bachelor student's thesis deadline is soon. Moving boundary EK debugging progresses, but not finished. Literature resesearch on visco-elastic LB: -Malas-Pinas model may not be the best choice acc. to Joost et al. -Flo: talk to U. Schiller

=== WS 2016 ===
* '''28.03.2017''' We discussed results from the DPG meeting (e.g. Microgels from the group of Richtering, Aachen, https://sharepoint.ecampus.rwth-aachen.de/vo/microgels/aussen/SitePages/Publications.aspx), strategies for moving L-shaped swimmers and simulating weak hydrogels in an external electric field.
* '''28.02.2017''' Jonas: We discussed the Poisson Boltzmann Cell Model, the free energy contributions which are necessary to determine the swelling equilibrium and first results of the COMSOL model.
* '''7.02.2017''' Kai: We discussed the relaxation time behaviour of the first Rouse mode for uncharged polymers tethered to a wall in the presence of hydrodynamic interactions. There seems to be a crossover for the relaxation times, depending on the channel height and polymer length.
* '''18.01.2017''' Julia presented the Computation of the 'Morphological Computation' for L shaped active swimmers. Nicolai presented results not included in his master thesis: susceptibilities/ relaxation times/ magnetization for isotropic/ uniaxial magnetic gels regarding the influence of Hydrodynamics (LB vs. Langevin thermostat). Idea of simulating ferro fluids due to more experimental data.
* '''22.11.2016''' Presentation of the Desalination Paper of Tobias, Progress report of Patrick (active colloid in viscous medium modeled by entangled protein solution)
* '''13.1.2016''' Patrick: Discussed how to test in simulations the magnetization model of anisotropic particles in an external magnetic field in an elastic medium. Further discussed why an active colloid in a viscoelastic medium could have an increased rotational diffusion. Kai: presented his paper on polymer stretching.

=== SS 2016 ===
* Tue, '''27.09.2016''' Progess reports by Julia (active L-shaped microswimmers) and Sebastian (sheared gels with Lees-Edwards boundary conditions)

=== WS 2015/16 ===
* Wed, '''03.02.2016''' External guest Daniel Häufle: L-shaped microswimmers
* Wed, '''13.01.2016''' Progress reports
* Wed, '''25.11.2015''' Progress report from the active Matter fraction

=== SS 2014 ===
* Wed, '''3.9.2014'''
* Wed, '''13.8.2014''' Coarse graining out the connecting polymers in magnetic gels (RW)
* Wed, '''23.7.2014'''
* Wed, '''2.7.2014''' Observables feature in ESPResSo by Stefan, some remarks on TRAVIS analysis tool for MD trajectories by Konrad
* Wed, '''11.6.2014'''
* Wed, '''21.5.2014''' Progress reports
* Wed, '''30.4.2014''' The reaction ensemble, integrating chemical reactions into computer simulations (TR)
* Wed, '''9.4.2014''' Starting the semester with status/progress reports

=== WS 2013/2014 ===
* Wed, '''12.02.2014''': Extraordinary Time: 15:30, Topic will be reports on progress and problems
* Wed, '''15.01.2013''': Cell under tension model for hydrogels (TR)
* Wed, '''04.12.2013''': fitting elastic constants in magnetic gels (RW) and as backup: Poisson-Boltzmann Cell under tension model for hydrogels (TR)
* Wed, '''20.11.2013''': Continuation of the blob picture for polymers under confinement, maybe talk on fitting elastic constants
* Wed, '''06.11.2013''': Talks on Blobology: Pincus blobs, Polymer blobs under confinement, electrostatic blobs
* Wed, '''23.10.2013''': Progress Report
* Wed, '''2.10.2013''': Initial meeting

=== Additional Material ===
Overview over active swimmers by Joost
{{Download|Active_swimmers.pdf|active swimmers}}

Some remarks on literature research by Joost
{{Download|Lit_research.pdf|literature research}}

Overview for the reaction ensemble method plus example implementation:
{{Download|reaction_ensemble.pdf|reaction ensemble}}