COMSOL v5.1 has possibility to use an Adaptive method to define Curvilinear coordinates system. According to description of the method, the adaptive method adapts the computed vector field to maintain a constant streamline density on the cross section.

1) What is mathematical or physical background of the Adaptive method?

2) What are system of equations and boundary conditions used to compute vector field in Adaptive method?

Thank you in advance,

Algis

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