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Space charge limited emission

Posted Feb 8, 2017, 6:26 a.m. EST Low-Frequency Electromagnetics Version 5.2 0 Replies

Roberto Morelli
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Hi,

I'm using Comsol 5.2 to model space charge limited emission in a specific case in which the chatode is the tip of a 2-D cylindrical carbon nanotube with height of 5 um and a radius of 0.001 um for the hemisperical tip.

I attached my model (made starting from the Child's law benchmark) down .

The results for my space charge limited emission current are unreasonable, i think the problem is in position offset for emission surface or, in the mesh, or maybe in the time step of the study.

Can anyone help me, please?
Thank you

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0 Replies Last Post Feb 8, 2017, 6:26 a.m. EST
COMSOL Moderator

Hello Roberto Morelli

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