L'objet de cette Note est l'homogénéisation d'une classe de problèmes élliptiques dans des domaines de , périodiquement perforés par des petits trous, avec des conditions de Neumann non homogènes sur le bord des trous. Dans un premier temps, les trous de taille avec et dans un second, on a des trous de taille mais aussi des trous de taille ε. Le premier cas, pour le Laplacien, a été étudié dans Conca et Donato (1988). Pour étudier le comportement asymptotique des solutions lorsque , on utilise ici la méthode de l'éclatement périodique introduite par Cioranescu et al. (2002), ce qui permet de considérer des opérateurs de second ordre à coefficients oscillants. Dans les deux situations, pour , on a un terme supplémentaire qui apparait dans le second membre de l'équation limite.
We consider elliptic problems in periodically perforated domains in , with nonhomogeneous Neumann conditions on the boundary of the holes. We are interested in the asymptotic behavior of the solutions as the period ε goes to zero. In a first case all the holes are “small”, i.e., are of size with . In the second case, there are again small holes but also holes of size ε. We use the periodic unfolding method introduced in Cioranescu et al. (2002), which allows us to study second order operators with highly oscillating coefficients and so, to generalize here the results of Conca and Donato (1988). In both cases, if , an additional term appears in the right-hand side of the limit equation.
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@article{CRMATH_2008__346_17-18_963_0, author = {Ould Hammouda, Amar}, title = {Periodic unfolding and nonhomogeneous {Neumann} problems in domains with small holes}, journal = {Comptes Rendus. Math\'ematique}, pages = {963--968}, publisher = {Elsevier}, volume = {346}, number = {17-18}, year = {2008}, doi = {10.1016/j.crma.2008.07.001}, language = {en}, url = {http://www.numdam.org/articles/10.1016/j.crma.2008.07.001/} }
TY - JOUR AU - Ould Hammouda, Amar TI - Periodic unfolding and nonhomogeneous Neumann problems in domains with small holes JO - Comptes Rendus. Mathématique PY - 2008 SP - 963 EP - 968 VL - 346 IS - 17-18 PB - Elsevier UR - http://www.numdam.org/articles/10.1016/j.crma.2008.07.001/ DO - 10.1016/j.crma.2008.07.001 LA - en ID - CRMATH_2008__346_17-18_963_0 ER -
%0 Journal Article %A Ould Hammouda, Amar %T Periodic unfolding and nonhomogeneous Neumann problems in domains with small holes %J Comptes Rendus. Mathématique %D 2008 %P 963-968 %V 346 %N 17-18 %I Elsevier %U http://www.numdam.org/articles/10.1016/j.crma.2008.07.001/ %R 10.1016/j.crma.2008.07.001 %G en %F CRMATH_2008__346_17-18_963_0
Ould Hammouda, Amar. Periodic unfolding and nonhomogeneous Neumann problems in domains with small holes. Comptes Rendus. Mathématique, Tome 346 (2008) no. 17-18, pp. 963-968. doi : 10.1016/j.crma.2008.07.001. http://www.numdam.org/articles/10.1016/j.crma.2008.07.001/
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