Wave Propagation in Bent Waveguide - VectorHelmholtz

[kbatra]

Hello Elmer Community,

Can you please help me figure out why I can't replicate the "VectorHelmholtz Waveguide Bent problem"? In my case, I've kept it as a rectangular box (removed the bent part). I followed the tutorial, but I can't visualize the electric field/Poynting vector moving through the channel. I hope you can identify the error. Thank you for your help in advance. I've attached my input files for you to examine.

Kind Regards,
K. Batra

[kevinarden]

units of the constants are in SI units, so your box is 100 meters wide. Is that the intent?

[kbatra]

Thanks for your answer. Here I attach the dimensions of my waveguide.

[raback]

The .msh file does not know anything about units. Hence the information is lost in translation and you end up mm being interpreted as m. -Peter

[kbatra]

Thanks Peter for pointing out. My intent is to have dimensions i.e. a= 10 cm and b= 5 cm.

[kevinarden]

The nodal values in the file are in the range of 100.
there is a coordinate scale option in the simulation section
coordinate scaling = 0.001
would put it in meters

[kbatra]

Hello again,

Thanks for your answers. I really appreciate it. I was able to solve the problem with one box

Now I extend the problem and added two more boxes to create a channel. Unfortunately this time I can't visualize the electric field/Poynting vector moving further. I hope you can identify the error. Thank you for your help in advance. I've attached my updated input files for you to examine.

Kind Regards,
K. Batra

[kevinarden]

In your mesh you do not have 1 body you have three bodies. In your sif you only specify elmer body 1 as mesh body 1
I think your intent in the sif would be

Body 1
Target Bodies(3) = 1 2 3
Name = "Body 1"
Equation = 1
Material = 1
End

or merge the three bodies into 1 body in the meshing

[kbatra]

thank you very much, by utilizing your suggestion, seems worked out