<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; ">Hi All,<DIV><BR class="khtml-block-placeholder"></DIV><DIV>Is anyone aware of PETSc particle tracking code?� I'm looking for something that will do Lagrangian particle tracking in parallel for 2D fluid flow on a regular�cartesian mesh.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>If this doesn't exist, I may try to create it---quick and dirty style.� My thinking was to a master-slaves parallelism: keep a complete directory of the particle locations on node 0 then send the entire directory to each node after each timestep to do an update.� Each node updates any points that fall into it's subdomain, flags those particle entries, then returns the entire directory to node 0.� Node 0 merges the updates into the master directory.��</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>This isn't scalable but it is simpler to program.� Does anyone have any suggestions about strategy, implementation, PETSc tools that would facilitate this, etc?</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Cheers</DIV><DIV>Rich</DIV><DIV><BR><DIV> <SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Courier; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Richard Foa Katz � � NSF IRFP Postdoc</DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><A href="http://www.damtp.cam.ac.uk/user/rfk22">http://www.damtp.cam.ac.uk/user/rfk22</A></DIV><BR class="Apple-interchange-newline"></SPAN> </DIV><BR></DIV></BODY></HTML>