Meaning of 'eps' in plasma model of COMSOL
 

Hi all,

I am trying what is mean by the term 'eps' in my equations, as I am currently facing some error mentioned previously in https://www.cfd-online.com/Forums/co...oximation.html

I tried to check one by one using equation view in COMSOL, but seems like I cannot find any expression regarding 'eps'.