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98 Jocelyne Erhel · Martin J. Gander Laurence Halpern · Géraldine Pichot Taoufi k Sassi · Olof Widlund Editors Domain Decomposition Methods in Science and Engineering XXI Editorial Board T. J.Barth M.Griebel D.E.Keyes R.M.Nieminen D.Roose T.Schlick Lecture Notes in Computational Science 98 and Engineering Editors: TimothyJ.Barth MichaelGriebel DavidE.Keyes RistoM.Nieminen DirkRoose TamarSchlick Forfurthervolumes: http://www.springer.com/series/3527 Jocelyne Erhel • Martin J. Gander (cid:129) Laurence Halpern (cid:129) Géraldine Pichot (cid:129) Taoufik Sassi (cid:129) Olof Widlund Editors Domain Decomposition Methods in Science and Engineering XXI 123 Editors JocelyneErhel MartinJ.Gander INRIA SectiondeMathématiques Rennes,France UniversitédeGeneJve GeneJve,Switzerland LaurenceHalpern LaboratoireAnalyse,Géometrie GéraldinePichot &Applications INRIA UniversitéParisXIII Rennes,France Villetaneuse,France OlofWidlund TaoufikSassi CourantInstitute LaboratoireLMNO NewYorkUniversity UniversitédeCaen NewYork,USA Caen,France ISSN1439-7358 ISSN2197-7100(electronic) ISBN978-3-319-05788-0 ISBN978-3-319-05789-7(eBook) DOI10.1007/978-3-319-05789-7 SpringerChamHeidelbergNewYorkDordrechtLondon LibraryofCongressControlNumber:2014950452 MathematicsSubjectClassification(2010):65F10,65N30,65N55 ©SpringerInternationalPublishingSwitzerland2014 Thisworkissubjecttocopyright.AllrightsarereservedbythePublisher,whetherthewholeorpartof thematerialisconcerned,specificallytherightsoftranslation,reprinting,reuseofillustrations,recitation, broadcasting,reproductiononmicrofilmsorinanyotherphysicalway,andtransmissionorinformation storageandretrieval,electronicadaptation,computersoftware,orbysimilarordissimilarmethodology nowknownorhereafterdeveloped.Exemptedfromthislegalreservationarebriefexcerptsinconnection with reviews or scholarly analysis or material supplied specifically for the purpose of being entered and executed on a computer system, for exclusive use by the purchaser of the work. Duplication of this publication or parts thereof is permitted only under the provisions of the Copyright Law of the Publisher’slocation,initscurrentversion,andpermissionforusemustalwaysbeobtainedfromSpringer. PermissionsforusemaybeobtainedthroughRightsLinkattheCopyrightClearanceCenter.Violations areliabletoprosecutionundertherespectiveCopyrightLaw. Theuseofgeneraldescriptivenames,registerednames,trademarks,servicemarks,etc.inthispublication doesnotimply,evenintheabsenceofaspecificstatement,thatsuchnamesareexemptfromtherelevant protectivelawsandregulationsandthereforefreeforgeneraluse. While the advice and information in this book are believed to be true and accurate at the date of publication,neithertheauthorsnortheeditorsnorthepublishercanacceptanylegalresponsibilityfor anyerrorsoromissionsthatmaybemade.Thepublishermakesnowarranty,expressorimplied,with respecttothematerialcontainedherein. Coverillustration:Mont-Saint-Michel,Normandy,bycourtesyofJocelyneErhel Printedonacid-freepaper SpringerispartofSpringerScience+BusinessMedia(www.springer.com) Preface of DD21 Book of Proceedings The proceedings of the 21st International Conference on Domain Decomposi- tion Methods contain the definitive technical record of advances in the analysis, algorithmic development, large-scale implementation, and application of domain decompositionmethodsinscienceandengineeringupto2012.Theconferencewas hostedbytheInriaRennescenterinFrance,June25–29,2012,andwasorganized jointly by the team Sage of Inria at Rennes (Brittany) and the team LMNO at the UniversityofCaen(Normandy).Itrepresentsthelargestmeetingtothisdate,with 260participants,mainlyfromEurope,butalsofromAmerica,Asia,andAfrica. Backgroundofthe Conference Series The International Conference on Domain Decomposition Methods has been held in13countriesthroughoutAsia,Europe,andNorthAmerica,beginninginParisin 1987.Heldannuallyforthefirst14meetings,itisspacedoutsinceDD15atroughly 18-monthintervals.Acompletelistofthepastmeetingsappearsbelow.Thetwenty- firstInternationalConferenceonDomainDecompositionMethodswasthethirdone heldinFrance,afterDD1inParisin1987andDD13inLyonin2000. The main technical content of the DD conference series has always been mathematical, but the principal motivation is to make efficient use of distributed memory computers for complex applications arising in science and engineering. Thus, contributionsfrom mathematicians, computer scientists, engineers, and sci- entists have always been welcome. While domain decomposition methods are nowadaysveryimportantfortheefficientsimulationoflarge-scaleapplicationson massivelyparallelprocessors,therearealsomanyinterestingapplicationsofdomain decomposition that are not massively parallel. For example, connecting just two subproblemsto effectivelyexploita differentsolveron each is also a corearea of researchvisible inthis conference,andthe same holdsfor couplingproblemslike fluid structure interaction. Especially as multiprocessing becomes commonplace, multiphysicsmodelingisinascendancy,sotheInternationalConferenceonDomain v vi PrefaceofDD21BookofProceedings DecompositionMethodsremainsasrelevantandasfundamentallyinterdisciplinary asever.Whileresearchindomaindecompositionmethodsispresentedatnumerous venues, the International Conference on Domain Decomposition Methods is the onlyregularlyoccurringinternationalforumdedicatedtointerdisciplinarytechnical interactionsbetweentheoreticiansandpractitionersworkinginthecreation,analy- sis,softwareimplementation,andapplicationofdomaindecompositionmethods. InternationalConferences onDomain DecompositionMethods 1. Paris,France,January7–9,1987 2. LosAngeles,USA,January14–16,1988 3. Houston,USA,March20–22,1989 4. Moscow,USSR,May21–25,1990 5. Norfolk,USA,May6–8,1991 6. Como,Italy,June15–19,1992 7. UniversityPark,Pennsylvania,USA,October27–30,1993 8. Beijing,China,May16–19,1995 9. Ullensvang,Norway,June3–8,1996 10. Boulder,USA,August10–14,1997 11. Greenwich,UK,July20–24,1998 12. Chiba,Japan,October25–29,1999 13. Lyon,France,October9–12,2000 14. Cocoyoc,Mexico,January6–11,2002 15. Berlin,Germany,July21–15,2003 16. NewYork,USA,January12–15,2005 17. St.Wolfgang-Strobl,July3–7,Austria2006 18. Jerusalem,Israel,January12–17,2008 19. Zhangjiajie,China,August17–22,2009 20. SanDiego,California,February7–11,2011 21. Rennes,France,June25–29,2012 InternationalScientificCommitteeon DomainDecomposition Methods (cid:129) PetterBjørstad,UniversityofBergen,Norway (cid:129) SusanneBrenner,LouisianaStateUniversity,USA (cid:129) MartinGander,UniversityofGeneva,Switzerland (cid:129) RolandGlowinski,UniversityofHouston,USA (cid:129) LaurenceHalpern,UniversityParis13,France (cid:129) RonaldHoppe,UniversitiesofAugsburg,Germany,andHouston,USA PrefaceofDD21BookofProceedings vii (cid:129) DavidKeyes,KAUST,SaudiArabia (cid:129) HyeaHyunKim,KyungHeeUniversity,Korea (cid:129) RalfKornhuber,FreieUniversitätBerlin,Germany (cid:129) UlrichLanger,UniversityofLinz,Austria (cid:129) AlfioQuarteroni,EPFL,Switzerland (cid:129) OlofWidlund,CourantInstitute,USA (cid:129) JinchaoXu,PennState,USA (cid:129) JunZou,ChineseUniversityofHongKong AbouttheTwenty-FirstConference The conference,which was organizedoveran entireweek, featured237presenta- tionsofthreedifferenttypes: (cid:129) 14 invited plenary talks: selected by the International Scientific Committee from aboutthree times this number of nomineesby the InternationalScientific Committee; (cid:129) 153 talks invited by minisymposiaorganizers,arrangedaround a special topic, andgroupedinto20minisymposia; (cid:129) 70contributedtalks,groupedinto21sessions. Theshearsizeofthe21stconferencerequiredforthefirsttimefourorfiveparallel sessions, which,whilebeinga hugesuccess forthe conferenceseries, madeitnot easy for the participants to attend all the talks they were interested in. All the presentations are gathered in the book of abstracts, which is available online at http://dd21.inria.fr/downloads/dd21-abstracts.pdf. Thepresentproceedingsvolumecontainsaselectionof94papers,splitinto11 plenarypapers,48minisymposiapapers,and35contributionpapers. SponsoringOrganizations (cid:129) LaboratoiredeMathématiquesNicolasOresme(LMNO) (cid:129) UniversityofCaenBasseNormandie(UCBN) (cid:129) CNRS,FédérationNormandieMathématiques (cid:129) Inria (cid:129) UniversityofRennes1 (cid:129) IRMAR (cid:129) INSARennes (cid:129) RISC-E (cid:129) ERC (cid:129) FondationMichelMétivier (cid:129) Rennescitycouncil viii PrefaceofDD21BookofProceedings (cid:129) Rennesmetropolecouncil (cid:129) Brittanycouncil (cid:129) Ministèredel’EnseignementSupérieuretdelaRecherche (cid:129) Cerfacs (cid:129) Maisondelasimulation (cid:129) Hutchinson CooperatingOrganizations (cid:129) IRISA (cid:129) ENSRennes (cid:129) SMAI (cid:129) MICADO Local OrganizingCommitteeMembers (cid:129) JocelyneErhel—Co-chair—InriaRennes (cid:129) TaoufikSassi—Co-chair—UniversityofCaen (cid:129) LéonardoBaffico—UniversityofCaen (cid:129) AlainCampbell—UniversityofCaen (cid:129) EdouardCanot—IRISA,Rennes (cid:129) ChristianDogbe—UniversityofCaen (cid:129) CarolineJaphet—UniversityofParis13andInriaParis (cid:129) GéraldinePichot—InriaRennes (cid:129) EdithBlin—ProjectManager—InriaRennes (cid:129) FabienneCuyollaa—Assistant—InriaRennes (cid:129) NadirSoualem—Webmaster—InriaRennes Social events included a welcoming reception at the Rennes city hall and an excursiontoMont-Saint-Michel,whichislistedUNESCOWorldHeritagesite,and whichisattheinterfacebetweenBrittanyandNormandy,concludedbyagaladinner inNormandy.Theplenaryspeakerswereinvitedfordinnerbythelocalorganizing committee. The organizingcommitteewouldliketo thankInriastaffforthe practicalhelp, theFrenchcommunityofDDinvolvedintheprogramcommittee,andthesponsors forthefinancialsupport. PrefaceofDD21BookofProceedings ix Research Activity in DomainDecomposition According toDD21 andIts Proceedings We now take a look at the current research activities in domain decomposition methods by taking a closer look at the content of the DD21 conference and the present proceedings. The conference and the proceedings contain three parts: the plenarypresentations,theminisymposiapresentationsandthecontributedtalks. PlenaryPresentations Theplenarypresentationsareselectedbythescientificcommittee,andthusreflect insomesensethecoreinterestofthiscommittee.InDD21,therewere14plenary talks,and11speakerssubmittedapapertotheproceedings.Eachpapercoversquite a different aspect of domain decomposition methods, and it is not easy to group them. There are three papers dealing with domain decomposition methods in the presence of DG discretizations. One is focusing on non-overlappingSchwarz and twomainclassesofspacedecompositions,thesecondonFETI-DPpreconditioners where jumps and non-conformingmeshes are allowed only between subdomains, andthelastoneoncouplingbetweenDGandfinitevolumemethodsinthecontext ofhydrocarbontransportinreservoirs. There are also three papers with a focus more on a particular application: one paperisdedicatedtoanewfiniteelementdiscretizationforparticulateflow,which has the advantage that only few modifications are needed in an existing Navier– Stokes solver to simulate particle transport. The second one proposes the use of mortar methods for discrete fracture networks in a BDD setting, and the last one proposesanefficientMPI implementationofan auxiliarysubspacepreconditioner forsolvingablackoilmodel. Twopapersaddresscoarsespacesandmultiscaleproblems:thefirstonepresents adaptivecoarsespacesforFETIfornonlinearproblems,andthesecondone,whose main focus is on multiscale problems, shows that for FETI and TFETI standard coarsespacescanbeused,incontrasttoSchwarzmethods,whichneedsophisticated coarsespacesinthepresenceofmultiscalephenomenaforrobustconvergence. There is only one paper dedicated to time-dependentproblems. Its focus is on optimizedSchwarzwaveformrelaxationmethodsfornonlinearparabolicproblems. Coefficients are optimized using asymptotic analysis for a linearized system of advectionreactiondiffusionequations,andthentestedinthenonlinearsetting. In one paper, a new domain decomposition method is proposed for integral equations.It is based on a local multitrace formulation,for which well posedness is shown under certain hypotheses, and also a relaxation is proposed based on optimizedSchwarztheory.

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