Re: [Libmesh-users] numbering of multiple variables in coupled PDEs

[Roy S. <roy...@ic...>]

On Tue, 18 Dec 2007, John Peterson wrote:

> Yujie writes:
> > Hi, everyone
> >
> > Supposed that I have three variables (U, V, W) in three coupled PDEs (Eq1,
> > Eq2, Eq3). In the final matrix and RHS, their numbering
> > is UEq1, UEq2, UEq3, VEq1, VEq2, VEq3, WEq1, WEq2, WEq3?
>
> Probably something like:
>
> [K_UU K_UV K_UW]     [U]
> [K_VU K_VV K_VW]     [V]
> [K_WU K_WV K_WW]     [W]

This is the default behavior.  If you want Dofs to be sorted by node
instead (giving a vector like [U1 V1 W1 U2 V2 W2 U3 V3 W3...]) there's
a little used command line option "--node_major_dofs" to do so.
---
Roy