# First variation of the general curvature-dependent surface energy

Günay Doğan; Ricardo H. Nochetto

ESAIM: Mathematical Modelling and Numerical Analysis (2011)

- Volume: 46, Issue: 1, page 59-79
- ISSN: 0764-583X

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topDoğan, Günay, and Nochetto, Ricardo H.. "First variation of the general curvature-dependent surface energy." ESAIM: Mathematical Modelling and Numerical Analysis 46.1 (2011): 59-79. <http://eudml.org/doc/222149>.

@article{Doğan2011,

abstract = {
We consider general surface energies, which are
weighted integrals over a closed surface with a weight function
depending on the position, the unit normal and
the mean curvature of the surface. Energies
of this form have applications in many areas, such as materials science,
biology and image processing. Often one is interested in finding
a surface that minimizes such an energy, which entails finding its first
variation with respect to perturbations of the surface.
We present a concise derivation of the first variation of the
general surface energy using tools from shape differential calculus.
We first derive a scalar strong form and next
a vector weak form of the first variation. The latter reveals the
variational structure of the first variation, avoids dealing
explicitly with the tangential gradient of the unit normal,
and thus can be easily discretized using parametric finite elements.
Our results are valid for surfaces in any number of dimensions
and unify all previous results derived for specific examples of
such surface energies.
},

author = {Doğan, Günay, Nochetto, Ricardo H.},

journal = {ESAIM: Mathematical Modelling and Numerical Analysis},

keywords = {Surface energy; gradient flow; mean curvature;
Willmore functional; surface energy; Willmore functional},

language = {eng},

month = {7},

number = {1},

pages = {59-79},

publisher = {EDP Sciences},

title = {First variation of the general curvature-dependent surface energy},

url = {http://eudml.org/doc/222149},

volume = {46},

year = {2011},

}

TY - JOUR

AU - Doğan, Günay

AU - Nochetto, Ricardo H.

TI - First variation of the general curvature-dependent surface energy

JO - ESAIM: Mathematical Modelling and Numerical Analysis

DA - 2011/7//

PB - EDP Sciences

VL - 46

IS - 1

SP - 59

EP - 79

AB -
We consider general surface energies, which are
weighted integrals over a closed surface with a weight function
depending on the position, the unit normal and
the mean curvature of the surface. Energies
of this form have applications in many areas, such as materials science,
biology and image processing. Often one is interested in finding
a surface that minimizes such an energy, which entails finding its first
variation with respect to perturbations of the surface.
We present a concise derivation of the first variation of the
general surface energy using tools from shape differential calculus.
We first derive a scalar strong form and next
a vector weak form of the first variation. The latter reveals the
variational structure of the first variation, avoids dealing
explicitly with the tangential gradient of the unit normal,
and thus can be easily discretized using parametric finite elements.
Our results are valid for surfaces in any number of dimensions
and unify all previous results derived for specific examples of
such surface energies.

LA - eng

KW - Surface energy; gradient flow; mean curvature;
Willmore functional; surface energy; Willmore functional

UR - http://eudml.org/doc/222149

ER -

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