Dear Aidyn, Thank you for your suggestion. It works! Best, Zhen On Wed, May 15, 2019 at 4:44 PM Aidyn Aitzhan <aidyn.b.aitzhan@gmail.com> wrote:

Hello Zhen,

Nektar++ outputs velocity as a scalar components. However, paraview draws stream traces from a vector. You need to concerts scalar components to vector within paraview. Use a calculator to create the velocity vector: u*iHat + v*jHat + w*kHat.

And then use this vector to draw stream traces.

Aidyn

On Wed, May 15, 2019, 16:33 zxiong@sas.upenn.edu <zxiong@sas.upenn.edu> wrote:

...

Dear all,

I use nektar++ to do a simulation and visualize the result in Paraview. The simulation domain is a 3D cylinder and it computes velocity in three directions(x,y,z-axis) and pressure of blood flow.

However, I can't use stream tracer filter in Paraview. I read the tutorial of Paraview and can successfully use stream tracer on data inside Paraview. Do I need to compute something else to enable the function stream tracer filter of Paraview? Is there any suggestion？

Many thanks!

Best,

Zhen _______________________________________________ Nektar-users mailing list Nektar-users@imperial.ac.uk https://mailman.ic.ac.uk/mailman/listinfo/nektar-users

Dear Stanisław, Thank you for your suggestion. It works! Best, Zhen On Wed, May 15, 2019 at 4:47 PM Stanisław Gepner <sgepner@meil.pw.edu.pl> wrote:

Hi, to get stream tracers or paths or anything of the sort in ParaView your data needs to be a Vector. You now have separate u,v,w Scalars in the ParaView.

Use the calculator filter and do: u*ihat+v*jhat+w*khat Than apply stream tracers to the Calculator filter node

Pozdrawiam, Stanisław Gepner

15 maj 2019 22:32 zxiong@sas.upenn.edu napisał(a):

Dear all,

I use nektar++ to do a simulation and visualize the result in Paraview. The simulation domain is a 3D cylinder and it computes velocity in three directions(x,y,z-axis) and pressure of blood flow.

However, I can't use stream tracer filter in Paraview. I read the tutorial of Paraview and can successfully use stream tracer on data inside Paraview. Do I need to compute something else to enable the function stream tracer filter of Paraview? Is there any suggestion？

Many thanks!

Best,

Zhen