Added a first version of section 2.4 related t the support for particle-based methods

diff --git a/9.2/paper.bib b/9.2/paper.bib
index 1ba7cdf9adad330c9c882f3fc854b0c7102e5a96..5c16fc5c8306e38b6bf258d0529711e7d75b6e8c 100644 (file)
--- a/9.2/paper.bib
+++ b/9.2/paper.bib
@@ -1042,3 +1042,15 @@ doi = {10.1016/0096-3003(82)90191-6}
   title = {$C^0$ Interior Penalty Methods for Fourth Order Elliptic Boundary Value Problems on Polygonal Domains},
   journal = {Journal of Scientific Computing}
 }
+
+
+@article{gassmoller2018flexible,
+       title={Flexible and Scalable Particle-in-Cell Methods With Adaptive Mesh Refinement for Geodynamic Computations},
+       author={Gassm{\"o}ller, Rene and Lokavarapu, Harsha and Heien, Eric and Puckett, Elbridge Gerry and Bangerth, Wolfgang},
+       journal={Geochemistry, Geophysics, Geosystems},
+       volume={19},
+       number={9},
+       pages={3596--3604},
+       year={2018},
+       publisher={Wiley Online Library}
+}

diff --git a/9.2/paper.tex b/9.2/paper.tex
index fb1f3346cbc9de1c8986a2bef9a1f1b968991676..ec289312bcc75612a17d2c675b68bf04fc4e065b 100644 (file)
--- a/9.2/paper.tex
+++ b/9.2/paper.tex
@@ -86,7 +86,7 @@
 
 
 \author[3]{Bruno Blais}
-\affil[3]{Research Unit for Industrial Flows Processes (URPEI),
+\affil[3]{Research Unit for Industrial Flows Processes (URPEI), Department of Chemical Engineering,
           Polytechnique Montréal,
           PO Box 6079, Stn Centre-Ville, Montréal, Québec, Canada, H3C 3A7.
           {\texttt{bruno.blais@polymtl.ca}}}
@@ -594,6 +594,34 @@ Fourier coefficients \cite{BangerthKayserHerold2007} and Legendre coefficients
 \subsection{Support for particle-based methods}
 \label{subsec:particles}
 
+Support for particles was originally introduced in \dealii{} version 9.0. In \dealii,
+particles can be used as passive tracers, or as part of more complex
+models such as those based on Particle-In-Cells (PIC) approaches \cite{gassmoller2018flexible}.
+
+With the current release, the support for particles has been further expanded: New parallel
+ insertion mechanisms and a basic interface to post-process particles have
+been added, effectively making their usage more flexible and enabling a larger
+range of use cases (e.g. immersed boundaries in step-70). 
+
+Through the addition of the \texttt{Particles::ParticleHandler::insert\_global\_particles} member function,
+ particles can now be inserted in parallel from a vector of points even if these points do not lie
+ on the subdomain from which the insertion is called. This operation requires extensive 
+ communication between the processes to locate   the MPI process the cell in which the particle
+  is located. However, it is made significantly faster  through the usage of bounding boxes
+  that surround the cells of each subdomain. 
+  This function also takes care of transferring the properties attached to the particles to their new owner.
+ This new capacity enables particle generators that insert particles at the location
+ of the support points (\texttt{Particles::Generator::dof\_support\_points}) and at the quadrature points (\texttt{Particles::Generator::quadrature\_points}) of a
+ possibly non-matching triangulation. Consequently, complex particle patterns can be inserted
+ using unstructured hexahedral grids generated outside of \dealii{}.
+ 
+To visualize the motion of particles, the \texttt{Particles::DataOut} class was added to the library.
+In its current version, this class supports writing the particles positions and id in all format supported
+by \dealii, but does not allow writing the properties attached to the particles.
+ 
+ 
+
+
 \todo[inline]{Luca: Your section}
 
 
@@ -1240,6 +1268,8 @@ W.~Bangerth and T.~Heister were also partially supported by award DMS-1821210.
 %f\"ur Technisch-Wissenschaftliches Hoch- und H\"ochstleistungsrechnen
 %(KONWIHR).
 
+B.~Blais was partially supported by the National Science and Engineering Research Council of Canada(NSERC)  through the RGPIN-2020-04510 Discovery Grant
+
 A.~V.~Grayver was partially supported by the European Space Agency
 Swarm DISC program.