Hi all,
This is a follow-up about moving mesh operation in libMesh.
If I write out the original mesh first, then change the nodal coordinates
by loop over each node, finally write out the new moved mesh to a local
file. I found that both the original mesh and the moved mesh are in one
file. What I expected is that I can output the updated mesh at each step,
but now it seems that all are output together at each step. Did I did
something wrong, or anything I lost?
The following codes simply update the nodal coordinates by 5 along the x
direction:
MeshBase::node_iterator nd = _surface_mesh.active_nodes_begin();
const MeshBase::node_iterator end_nd = _surface_mesh.active_nodes_end();
for ( ; nd != end_nd; ++nd)
{
Node* node = *nd;
const dof_id_type n_id = node->id();
for(unsigned int i=0; i<3; ++i)
{
Real ttt = 0.;
if (i==0) ttt = 5.;
(*node)(i) = (*node)(i) + ttt;
}
Thank you in advance.
Xujun
On Mon, Oct 19, 2015 at 6:34 PM, John Peterson <[email protected]> wrote:
>
>
> On Mon, Oct 19, 2015 at 5:08 PM, Xujun Zhao <[email protected]> wrote:
>
>> Hi all,
>>
>> I have a problem for particulate flow. If have already calculate the
>> velocity on each node of the particle, and I want to move mesh according
>> to
>> the computed displacement at each time step, then how can achieve it? Can
>> I
>> just simply loop over each node and change their values or there is a
>> better way to do it?
>>
>
> Yes, you can just move the nodes directly, assuming that makes sense with
> the rest of your PDE formulation...
>
> --
> John
>
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