http://www.channelflow.org/dokuwiki/ 2012-05-17T07:25:37-07:00 http://www.channelflow.org/dokuwiki/ http://www.channelflow.org/dokuwiki/lib/tpl/default/images/favicon.ico text/html 2010-02-02T07:55:09-07:00 http://www.channelflow.org/dokuwiki/doku.php?id=billiards&rev=1265126109&do=diff <- chaosbook John F. Gibson, 2009-02-12 17:24 made a billiards page, for testing purposes now go forth and play billiards text/html 2008-12-24T08:45:39-07:00 http://www.channelflow.org/dokuwiki/doku.php?id=bugs&rev=1230137139&do=diff To add a bug to the buglist, * Make sure you are registered and logged in. Otherwise you won't see the “New thread” button. * Enter a short descriptive name for the bug in the “New thread” window and click the “Create this page” button. * Write a bug report in new page, between the line with your name and the DISCUSSION tag. * Preview and save the new page. text/html 2010-02-02T07:55:09-07:00 http://www.channelflow.org/dokuwiki/doku.php?id=channelflow.org&rev=1265126109&do=diff download | documentation | database | movies | studygroup Channelflow is a software system for numerical analysis of the incompressible Navier-Stokes flow in rectangular geometries, written in C++. The core engine of channelflow is a spectral CFD algorithm for integrating the Navier-Stokes equations. This engine drives a number of higher-level algorithms that (for example) compute equilibria, traveling waves, and periodic orbits of Navier-Stokes. Channelflow provides these algorithms in an ea… text/html 2011-01-04T20:34:39-07:00 http://www.channelflow.org/dokuwiki/doku.php?id=chaosbook&rev=1294202079&do=diff <- research blogs forum for ChaosBook.org discussions (an experiment in progress) How to ... * How to login * How to blog * How to proofread * To do * Kvetch here ChaosBook chapters * Overture * Go with the flow * Discrete time dynamics * Local stability * Get straight * Hamiltonian dynamics * Billiards * World in a mirror * Relativity for cyclists * Charting the state space * Stretch, fold, prune * Fixed points, and how to get them * Walkabout: Transit… text/html 2009-06-05T09:17:15-07:00 http://www.channelflow.org/dokuwiki/doku.php?id=database&rev=1244218635&do=diff This database contains invariant solutions to plane Couette flow (equilibria, traveling waves, and periodic orbits) for a number of different parameters. Briefly, if ft(u) is the time-t map of the Navier-Stokes equations with plane Couette boundary conditions, text/html 2011-01-24T13:36:30-07:00 http://www.channelflow.org/dokuwiki/doku.php?id=debt&rev=1295904990&do=diff When talking about Debt, all we know is debt is like a disease that can enable us from living a happy and normal life by taking control over our lives. Don't use all you resources on spending on an unimportant thing and it is very upsetting when you are having a debt. Most of us don’t even know how we end up in the situation we are in. Buying every thing we own with credit has become our culture. But don’t let debt control your life any more. You should establish an emergency fund that may able … text/html 2008-12-29T06:56:02-07:00 http://www.channelflow.org/dokuwiki/doku.php?id=development_projects&rev=1230562562&do=diff * Add OpenMP parallelization * Extend coverage of Python wrapper to level of channelflow/programs * Use Python wrapper to connect to visualization toolkit * Change order of FlowField data layout from i,y,x,z to i,x,z,y * Bring User's Manual up to version 1.2.x * Implement velocity-vorticity algorithm * Implement body force. Hansjörg Seybold. * Implement Boussinesq approximation * Implement other wall boundary conditions: free-slip, blowing/sucking * Simplify/unify setting of … text/html 2009-06-05T09:59:24-07:00 http://www.channelflow.org/dokuwiki/doku.php?id=docs&rev=1244221164&do=diff Getting started * Installation * Tutorial * [User Guide] (detailed but outdated, for version 0.9.x) Mathematics * Symmetry * Base flow and fluctuation * The Newton-Krylov-hookstep algorithm for finding equilibria and periodic orbits Utilities Channelflow includes a number of predefined command-line utilities that perform common calculations for research in the dynamics of turbulence. Most utilities read a velocity field from disk, operate on it according to command-line options… text/html 2009-06-11T14:38:17-07:00 http://www.channelflow.org/dokuwiki/doku.php?id=download&rev=1244756297&do=diff Current development code Channelflow development code is hosted at <http://svn.channelflow.org/channelflow>. To check out a fresh copy of the channelflow source run svn co http://svn.channelflow.org/channelflow See <http://subversion.tigris.org> for more on subversion usage. text/html 2012-01-25T09:57:08-07:00 http://www.channelflow.org/dokuwiki/doku.php?id=gibson&rev=1327514228&do=diff I am interested in turbulence and dynamical systems theory. The hope that dynamical systems theory could shed light on turbulence goes back some sixty years to Hopf. But it has proven difficult to translate Hopf's insights into concrete results, due to the very high (in principle infinite) dimensionality of the Navier-Stokes equations. text/html 2011-08-10T08:11:10-07:00 http://www.channelflow.org/dokuwiki/doku.php?id=gtspring2009&rev=1312989070&do=diff blogs ChaosBook blog research projects howto Channelflow tutorials study group schedule participants request to John: Can you pencil in the group orbit of the Nagata upper branch on the same kind of plot as full states space portrait? The last time you plotted this was 2006-01-02 (the figure inserted here), and that was before we knew how to project onto solutions in the states space, so I suspect the wiggles in the far end of the torus are due to the projection on Fourier mod… text/html 2010-02-02T07:55:09-07:00 http://www.channelflow.org/dokuwiki/doku.php?id=installation&rev=1265126109&do=diff Please read/search the channelflow Installation guide and the previous installation forum Q&A's before posting a new question. When reporting a problem with installation, please always include the following information * The operating system, e.g. OpenSUSE 11.1 or Mac OS X 10.5 * The compiler, e.g. gcc-4.3.1 * The channelflow version, e.g. channelflow-1.3.3 * The exact text of the command you tried and the resultant error messages, e.g. “make install” and ... text/html 2011-02-28T10:37:52-07:00 http://www.channelflow.org/dokuwiki/doku.php?id=link_building&rev=1298918272&do=diff Link building are great ways to get visitors to your website, and another good way to attract attention with the resulting free traffic is with reciprocal link exchanges. text/html 2010-02-02T20:03:09-07:00 http://www.channelflow.org/dokuwiki/doku.php?id=movies&rev=1265169789&do=diff These movies are designed to convey the main ideas of my research in plane Couette flow. For more details, please see my papers. Visualization scheme The movies show plane Couette flow in a rectangular box of size [Lx, Ly, Lz] with solid walls on the top and bottom (y = -Ly/2 and Ly/2). The top wall and the upper half of the fluid are cut away to show what happens at the midplane y=0. The walls slide at constant speeds in opposite directions along x, the top wall slides towards the back o… text/html 2010-02-02T07:55:09-07:00 http://www.channelflow.org/dokuwiki/doku.php?id=old_news&rev=1265126109&do=diff released 2009-03-24. * a minor update released to help Georgia Tech study group compile the latest research codes released, 2009-02-26. New features: * continuefields: quadratic extrapolation of flowfields against arbitrary parameter * poincare: calculate crossings of Poincaré sections in plane Couette and channel flows * field2hdf5: convert channelflow binary flowfields to HDF5 files * configure script checks for gcc before adding gcc-specific compiler flags text/html 2009-01-27T15:12:20-07:00 http://www.channelflow.org/dokuwiki/doku.php?id=p19p02movie&rev=1233097940&do=diff text/html 2009-03-17T08:49:28-07:00 http://www.channelflow.org/dokuwiki/doku.php?id=programming&rev=1237304968&do=diff This forum is meant for discussing questions about channelflow programming. To open a new topic on the list, * Make sure you are registered and logged in. Otherwise you won't see the “New thread” button. * Enter a brief subject line in the “New thread” window and click the “Create this page” button. * Write up the programming issue between the line with your name and the DISCUSSION tag. * Preview and save the new page. text/html 2009-07-08T07:19:30-07:00 http://www.channelflow.org/dokuwiki/doku.php?id=references&rev=1247062770&do=diff Numerical algorithms * L. Kleiser and U. Schuman, Treatment of incompressibility and boundary conditions in 3-D numerical spectral simulations of plane channel flows, in Proc. 3rd GAMM Conf. Numerical Methods in Fluid Mechanics, ed. E. Hirsch (1980) text/html 2011-07-20T09:28:08-07:00 http://www.channelflow.org/dokuwiki/doku.php?id=register&rev=1311179288&do=diff Unfortunately I had to suspend self-registration because of spammers. If you would like to register at channelflow.org please send an email to johnfgibson at gmail.com, including your full name, your desired username, and your reason for registering. text/html 2011-07-20T09:33:20-07:00 http://www.channelflow.org/dokuwiki/doku.php?id=start&rev=1311179600&do=diff download documentation database movies source code research blogs references register login Channelflow is a software system for numerical analysis of the incompressible Navier-Stokes flow in channel geometries, written in C++. The core engine of Channelflow is a spectral CFD algorithm for integrating the Navier-Stokes equations. This engine drives a number of higher-level algorithms that (for example) compute equilibria, traveling waves, and periodic orbits of Navier-Stoke… text/html 2010-02-02T07:55:09-07:00 http://www.channelflow.org/dokuwiki/doku.php?id=testamonials&rev=1265126109&do=diff from channelflow users. Please feel free to comment on channelflow here. ---------- Channelflow.org changed my life. Not kidding. And that's before I ever succeeded in actually running any code on it. Eternally awed --- Predrag Cvitanovic 2009-08-05 09:16 text/html 2010-02-02T07:55:09-07:00 http://www.channelflow.org/dokuwiki/doku.php?id=testimonials&rev=1265126109&do=diff One of channelflow's main goal is to lower the barrier to entry to computational research in fluid dynamics. If channelflow has helped you this way, please consider posting a note about your experience here. Who knows? Your testimony might help me get a permanent job. J. Gibson 2009-08-06