Hello. First of all i am fairly new comsol user. Currently i am studying heating of fused silica fibers (https://en.wikipedia.org/wiki/Optical_fiber) for purposes of laser applications. Typical optical fiber is very thin cylinder (diameter is 125 um) with big length (1 m and much more). So this is the place where the problem appears. I draw a fiber with lenght of 1.5 mm and diameter of 125 um and comsol manage it very good (see two files "Length_1500um_General View.jpg" and "Length_1500um_Transverse View.jpg"). But fiber with length of 1 m looks very low poly and modeling heating in such geometry is worthless ("Length_1m_General View.jpg" and "Length_1m_Transverse View.jpg"). Is there any mean to make comsol maintain quality in this situation?
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