And by that I mean you get a mass matrix on the left hand side and the pressure gradient only shows up inside the source term, where it is integrated inside he element and is well posed.
-Ben On Apr 23, 2013, at 8:26 AM, "Kirk, Benjamin (JSC-EG311)" <[email protected]> wrote: > Are you using a finite element method? If so, you wind up weighting this term > under an integral and everything works out. > > -Ben > > > On Apr 22, 2013, at 7:42 PM, "Zhang" <[email protected]> wrote: > >> >> >> >> Dear all, >> >> As a beginner of libMesh, I am using it to build an incompressible N-S >> solver with projection method. >> >> When I am trying to calculate as follows, >> >> u^{n+1}=u^{n}-dt*grad(p), >> >> >> I wonder how to project the pressure gradient grad(p) in Q1 space into the >> velocity u 's space Q2. Is there >> any built-in function for such a task? >> >> >> >> Thanks >> >> Zhenyu Zhang >> >> >> >> >> >> >> ------------------------------------------------------------------------------ >> Precog is a next-generation analytics platform capable of advanced >> analytics on semi-structured data. The platform includes APIs for building >> apps and a phenomenal toolset for data science. Developers can use >> our toolset for easy data analysis & visualization. Get a free account! >> http://www2.precog.com/precogplatform/slashdotnewsletter >> _______________________________________________ >> Libmesh-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/libmesh-users > > ------------------------------------------------------------------------------ > Try New Relic Now & We'll Send You this Cool Shirt > New Relic is the only SaaS-based application performance monitoring service > that delivers powerful full stack analytics. Optimize and monitor your > browser, app, & servers with just a few lines of code. Try New Relic > and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr > _______________________________________________ > Libmesh-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/libmesh-users ------------------------------------------------------------------------------ Try New Relic Now & We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, & servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr _______________________________________________ Libmesh-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
