Adding multiple cylinders into the same model PDE Toolbox

Hi, I am trying to construct a 3D model for electrical analysis later. I have 3 cylinders and 1 hollow cylinders.

When I am trying to make all of them into one model, I encountered the following error:

which correspond to this line:

May I know how to add all my shapes into the same model?

Thank you!!

Here is my code:

Building the base Stratum Corneum and Variable Skin
SC3d = multicylinder(basesize,hSC)  %create SC
VS3d = multicylinder(basesize,hVS, "Zoffset",-hVS) %create VS
Sense3d = multicylinder(R1, hEL, "Zoffset",hSC) %create sensor
Inject3d = multicylinder([R1+R2 R3], hEL, "Zoffset", hSC) %create inject

model = createpde
model.Geometry = SC3d + VS3d
pdegplot(model,"CellLabels","on","FaceAlpha",0.5)

Answer 1

[VBBV]

model.Geometry = [SC3d  VS3d]

[VBBV]

Use concatenation operator [ ]

[Miles Hao Peng Su]

Thanks! Now it did solve my question - however I encountered some problem with the inject3d.

I want it to be a hollow cylinder with some offset z, may I know if this is doable?

This error shows up:

with this line of code:

Inject3d = multicylinder([R1+R2 R3], hEL, "Void", [true false], "Zoffset", hSC) %create inject

Thanks!

[Miles Hao Peng Su]

Hi, also, this error showed up when using the concatenation operator:

model.Geometry = [SC3d VS3d Sense3d]

is there another way for me to use this?