{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T07:49:02Z","timestamp":1777448942698,"version":"3.51.4"},"reference-count":0,"publisher":"SAGE Publications","issue":"1-2","license":[{"start":{"date-parts":[[2012,7,1]],"date-time":"2012-07-01T00:00:00Z","timestamp":1341100800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Asymptotic Analysis"],"published-print":{"date-parts":[[2012,7]]},"abstract":"<jats:p>We study the effect of a periodic roughness on a Neumann boundary condition. We show that, as in the case of a Dirichlet boundary condition, it is possible to approach this condition by a more complex law on a domain without rugosity, called wall law. This approach is however different from that usually used in Dirichlet case. In particular, we show that this wall law can be explicitly written using an energy developed in the roughness boundary layer. The first part deals with the case of a Laplace operator in a simple domain but many more general results are next given: when the domain or the operator are more complex or with Robin\u2013Fourier boundary conditions. Some numerical illustrations are used to obtain magnitudes for the coefficients appearing in the new wall laws. Finally, these wall laws can be interpreted using a fictive boundary without rugosity. That allows to give an application to the water waves equation.<\/jats:p>","DOI":"10.3233\/asy-2011-1086","type":"journal-article","created":{"date-parts":[[2019,11,29]],"date-time":"2019-11-29T19:21:26Z","timestamp":1575055286000},"page":"85-121","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":5,"title":["Roughness effect on Neumann boundary condition"],"prefix":"10.1177","volume":"78","author":[{"given":"Laurent","family":"Chupin","sequence":"first","affiliation":[{"name":"Laboratoire de Math\u00e9matiques, UMR 6620, Universit\u00e9 Blaise Pascal, Campus des C\u00e9zeaux, F-63177 Aubi\u00e8re Cedex, France. E-mail: laurent.chupin@math.univ-bpclermont.fr"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2012,7,1]]},"container-title":["Asymptotic Analysis"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.3233\/ASY-2011-1086","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.3233\/ASY-2011-1086","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,28]],"date-time":"2026-04-28T12:39:31Z","timestamp":1777379971000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.3233\/ASY-2011-1086"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2012,7]]},"references-count":0,"journal-issue":{"issue":"1-2","published-print":{"date-parts":[[2012,7]]}},"alternative-id":["10.3233\/ASY-2011-1086"],"URL":"https:\/\/doi.org\/10.3233\/asy-2011-1086","relation":{},"ISSN":["0921-7134","1875-8576"],"issn-type":[{"value":"0921-7134","type":"print"},{"value":"1875-8576","type":"electronic"}],"subject":[],"published":{"date-parts":[[2012,7]]}}}