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Hi everyone,

I am trying to simulate Joule heating in a simple geometry. The current is injected into one metallic nano wire with a high aspect ratio (thickness 60 nm, width 1.5 um, length 50 um) below which the substrate lies (thickness 100 um). For the moment the geometry is simple but structures will be added later. The symetry of the problem necessitate some region to be finely meshed whereas others can be coarser. Does anyone have tips for the meshing of this kind of thin strip with high aspect ratio? The problem is that I want to resolve finely the thickness of the nanowire while keeping the number of elements reasonable. I've tried to map faces of the wire and sweep with a predefined distribution type of elements with a ratio of 20 (geometric sequence). But thereafter, the meshing of the substrate fails (error: impossible to insert point). Tweaking the meshing parameter for the nanowires (number of element and element ratio) solves the problem but then the number of element may be too high, especially in the futur where I will simulate a more complex structure with a length of 2 mm.

I cannot attach my .mph file because of file extension error message.

Any help would be appreciated.

Best regards,
André C.