On Wed, 8 Apr 2015, grandrabbit wrote:
I see. But is there a way to remove the nulspace explicitly in
libmesh other than forcing the presure value at one node, such as
substraction the average pressure value?
One of the SCALAR example codes does this via a Lagrange multiplier,
yes.
Currently I am facing a problem shown in
http://sourceforge.net/p/libmesh/mailman/libmesh-users/thread/tencent_672F5BDA5899183B587C02E3%40qq.com/#msg33737791
In this case, when I make a parallel run, the pinned value added in
compute_residual(...) can not be successfully updated by the
TransientNonlinearImplicitsystem.
I'm afraid I don't see why not.
---
Roy
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