Re: [Libmesh-users] spherical coordinates

2013-05-09 Thread David Knezevic
On 05/09/2013 04:21 PM, Peter Zajac wrote: > > On Thu, May 9, 2013 at 11:29 AM, David Knezevic > mailto:[email protected]>> wrote: > > On 05/09/2013 02:22 PM, PETER ZAJAC wrote: > > David, > > I was worried about the volume element for integration. If I > use

Re: [Libmesh-users] spherical coordinates

2013-05-09 Thread Peter Zajac
On Thu, May 9, 2013 at 11:29 AM, David Knezevic wrote: > On 05/09/2013 02:22 PM, PETER ZAJAC wrote: > >> David, >> >> I was worried about the volume element for integration. If I use >> explicit transformations of coordinates to spherical how would I make sure >> that the volume element for inte

Re: [Libmesh-users] spherical coordinates

2013-05-09 Thread David Knezevic
On 05/09/2013 02:22 PM, PETER ZAJAC wrote: > David, > > I was worried about the volume element for integration. If I use explicit > transformations of coordinates to spherical how would I make sure that the > volume element for integration changes accordingly. Cartesian -> spherical is just a

Re: [Libmesh-users] spherical coordinates

2013-05-09 Thread PETER ZAJAC
David, I was worried about the volume element for integration. If I use explicit transformations of coordinates to spherical how would I make sure that the volume element for integration changes accordingly. Paul, I am not sure i ll be the best person for the job. With all my honesty (and

Re: [Libmesh-users] spherical coordinates

2013-05-09 Thread Roy Stogner
On Thu, 9 May 2013, Paul T. Bauman wrote: > What David said is correct (and how I currently deal with cylindrical > coordinates). Nevertheless, while there are no formal plans, I've thought > it would be nice to try and deal with alternative (to Cartesian) coordinate > systems at the libMesh leve

Re: [Libmesh-users] spherical coordinates

2013-05-09 Thread Paul T. Bauman
What David said is correct (and how I currently deal with cylindrical coordinates). Nevertheless, while there are no formal plans, I've thought it would be nice to try and deal with alternative (to Cartesian) coordinate systems at the libMesh level. E.g. JxW comes premultiplied by r, curl/Laplacian

Re: [Libmesh-users] spherical coordinates

2013-05-09 Thread David Knezevic
I'm not sure I understand what you're getting at, but if you write the PDE in terms of (r,theta,phi), then you can just use libmesh in the standard way. You'll presumably get sin's, cos's and 1/r terms in the weak form, but that's no problem... On 05/09/2013 01:43 PM, Peter Zajac wrote: > Dea

[Libmesh-users] spherical coordinates

2013-05-09 Thread Peter Zajac
Dear All, Is treatment in spherical coordinates an option in Libmesh? If not is there a plan to implement it in the near future? Thank you in advance PZ -- Learn Graph Databases - Download FREE O'Reilly Book "Graph Data