TELEMAC-MASCARET Forum: lissage surface libre (1/1)

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TOPIC: lissage surface libre

lissage surface libre 9 years 7 months ago #16683

Haumont	Bonjour, j aimerai savoir si ly a moyen d effectuer un lissage de la surface libre et si oui, quel est le mot clé à introduire. Merci
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lissage surface libre 9 years 7 months ago #16685

jmhervouet

Hello,

There is no post-processing smoothing the free surface at the end of every time step, this would spoil mass conservation of tracers and/or boundary conditions. If there are wiggles on the free surface, try the keyword:

FREE SURFACE GRADIENT COMPATIBILITY (COMPATIBILITE DU GRADIENT DE SURFACE LIBRE)

you can go down to 0. Default value is 1. If it does not work you can try quasi-bubble elements for the velocity :

DISCRETIZATIONS IN SPACE : 12;11 (DISCRETISATIONS EN ESPACE : 12;11)

but sometimes wiggles are just due to bad boundary conditions or to a problem which is not well posed.

With best regards,

Jean-Michel Hervouet

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