Lagrange multiplier in axial symmetry

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Flanell

Flanell

January 11, 2017 5:46pm UTC

Lagrange multiplier in axial symmetry

Hey Guys,

i am modelling a moving boundary interface (Stefan Problem), using the Lagrange multiplier T_lm from heat transfer analysis for prescribed normal mesh velocity in the deformed geometry physics.

The model is almost identical to the 2D Tin melting front example from Comsol library:
www.comsol.com/model/tin-melting-front-6234
except that I work in axial symmetry and my interface is perpendicular to the axis of symmetry.

When I solve, the Lagrange multiplier T_lm is always zero at r=0. I guess I am missing something fundamental here ? Does anyone have a hint for me ?

Thank you and Regards

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Flanell

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