% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@INPROCEEDINGS{Briels:280513,
      author       = {Briels, Willem},
      title        = {{M}esoscopic modelling of flowing complex matter, memory
                      and {G}alilean invariant {B}rownian {D}ynamics},
      reportid     = {FZJ-2016-00281},
      year         = {2015},
      abstract     = {Complex soft matter usually consists of large molecules
                      with extremely many degrees of freedom. In this talk we are
                      especially interested in molecules which interact with many
                      neighboring particles, typically in the order of a few
                      hundreds. Typical examples are star polymers whose arms mix
                      with those of neighboring stars, or even entangle with them
                      in the rheological sense when they are sufficiently long.
                      Other example are systems of tri-block-copolymers of which
                      the middle block is solvophillic and the two outer blocks
                      are solvophobic. Such polymers will arrange their
                      solvophobic parts into micelles, with the solvophillic inner
                      blocks dangling around them. At high concentrations the
                      solvophilic middle blocks may form bridges from one micelle
                      to another, thereby forming transient networks.When set into
                      shearing motion, particles will displace with respect to
                      each other, and their internal structure will be disrupted.
                      The typical time scale for rupture and re-establishing of
                      this structure will give rise to long time processes
                      strongly interacting with the externally imposed motion.
                      These long time processes may of course be studied by models
                      including all the relevant small scale information of the
                      molecules. When coarse graining the molecules this
                      possibility gets lost and the long time processes must be
                      introduced as memory into the dynamics of the coarse
                      objects. In this presentation I will present a way to do
                      this, which is still computationally efficient. After
                      presenting the general concept and some examples, I will
                      address shortcomings of the present implementation of the
                      model and suggest possible ways to solve the problems.In the
                      last part of the presentation I will present a way to
                      generalize Brownian Dynamics to a Galilei invariant
                      simulation scheme. As is well known this can be done by
                      adding to the displacements of the particles affine
                      contributions due to the average flow in the neighborhoods
                      of the particles. The challenge is to devise a model to
                      calculate these average flows as they develop in response to
                      the perturbations at the boundaries of the system. I will
                      demonstrate how this can be done and pay attention to
                      differences between this method and the traditional Brownian
                      Dynamics codes. In particular in strongly sheared systems
                      the traditional Brownian Dynamics method doesn’t seem very
                      realistic.},
      month         = {Sep},
      date          = {2015-09-01},
      organization  = {Workshop on Self-Assembly in Soft
                       Matter, Patras (Greece), 1 Sep 2015 - 2
                       Sep 2015},
      subtyp        = {Invited},
      cin          = {ICS-3},
      cid          = {I:(DE-Juel1)ICS-3-20110106},
      pnm          = {551 - Functional Macromolecules and Complexes (POF3-551)},
      pid          = {G:(DE-HGF)POF3-551},
      typ          = {PUB:(DE-HGF)31},
      url          = {https://juser.fz-juelich.de/record/280513},
}