Matt, Thanks a lot! I'll try your suggestions.
Chuei-Ching Chiou On Tue, Aug 28, 2012 at 3:59 AM, Matthew Knepley <knepley at gmail.com> wrote: > On Sun, Aug 26, 2012 at 10:29 PM, C.-C. Chiou <ccchiou2012 at gmail.com>wrote: > >> >> Matt, >> >> Thank you. >> >> Now, I'm dealing with a work like that: (for example) >> >> ______ >> | | >> | | >> ________ | | >> | | | >> | f1 | f2 | >> |________ | | >> | | >> | | >> |_____ | >> >> (or please see the attached file "blocks_fig1.png" ) >> >> I have a physical domain partitioned into two blocks f1 and f2 (or more >> for other case), >> and I need to solve Navier-Stoke equations concerning on such domain by >> multi-block solver, >> with two connected structured meshes respectively for f1 and f2. >> >> I wonder whether case like the above for example is considered as one of >> experiment. >> > > So for this case we have no easy support. You would have to manually > construct a VecScatter > object which encoded the coupling between the meshes, and there really are > not any examples > of this. Note that Hypre does have a specific interface for this (I think > its SStruct). > > Thanks, > > Matt > > >> Regards. >> >> >> Chuei-Ching Chiou >> >> >> >> On Wed, Aug 22, 2012 at 6:50 PM, Matthew Knepley <knepley at gmail.com>wrote: >> >>> On Wed, Aug 22, 2012 at 2:52 AM, C.-C. Chiou <ccchiou2012 at >>> gmail.com>wrote: >>> >>>> Dear Mathew, >>>> >>>> Thanks for your response! >>>> >>>> At line 645 in the source code, >>>> http://www.mcs.anl.gov/petsc/petsc-dev/include/petscsnes.h.html , >>>> some SNES routines for multi-block solver were listed. >>>> Is there any source code for specific testing PDE problem with these >>>> routines? >>>> >>> >>> That is an experiment that does not yet work. >>> >>> >>>> In addition, is the KSP version available? >>>> >>> >>> Its called ASM. >>> >>> Matt >>> >>> >>>> Sincerely regards. >>>> >>>> Chuei-Ching Chiou >>>> >>>> >>>> On Wed, Aug 8, 2012 at 9:06 PM, Matthew Knepley <knepley at >>>> gmail.com>wrote: >>>> >>>>> On Wed, Aug 8, 2012 at 2:30 AM, C.-C. Chiou <ccchiou2012 at >>>>> gmail.com>wrote: >>>>> >>>>>> Dear all, >>>>>> >>>>>> For concerning more general geometry of physical domain, for some >>>>>> situations, >>>>>> we need to apply the multi-block mesh. The attached figure (or >>>>>> alternatively the following link) illustrates one of examples. >>>>>> >>>>>> https://dl.dropbox.com/u/17189529/share_documents/IMAG0003.jpg >>>>>> >>>>>> Have you ever dealt with such kind of case with application of the >>>>>> PETSc object 'DA' ? >>>>>> >>>>> >>>>> Our intention for this is that you use a DMComposite structure. Let us >>>>> know if the documentation is unclear >>>>> on anything, since it is somewhat new. >>>>> >>>>> Thanks, >>>>> >>>>> Matt >>>>> >>>>> >>>>>> Suppose we build multiple DA(or DM) for governing the multi-block >>>>>> data structure, >>>>>> in other words, we respectively build a DA for each block of mesh. >>>>>> Especially in parallel computing, >>>>>> how can we manage and control the communications between blocks of >>>>>> data accurately and efficiently? >>>>>> And, how can we ensure the correctness of parallel computational >>>>>> results? >>>>>> >>>>>> I wonder whether some possible application of PETSc object 'DA' (or >>>>>> DM) is sufficient for dealing with cases in multi-block mesh. >>>>>> >>>>>> >>>>>> Sincerely regards. >>>>>> >>>>>> >>>>>> Chuei-Ching Chiou >>>>>> >>>>>> >>>>>> -- >>>>>> Chuei-Ching Chiou, >>>>>> Ph. D student, >>>>>> Aerothermal & Plasma Physics Laboratory >>>>>> Department of Mechanical Engineering >>>>>> National Chiao Tung University >>>>>> Hsinchu 30010, TAIWAN >>>>>> TEL: +886-35712121 ext. 55175 >>>>>> E-mail: C <staystay.me99g at g2.nctu.edu.tw>CChiou2012 at gmail.com >>>>>> >>>>>> >>>>> >>>>> >>>>> -- >>>>> What most experimenters take for granted before they begin their >>>>> experiments is infinitely more interesting than any results to which their >>>>> experiments lead. >>>>> -- Norbert Wiener >>>>> >>>> >>>> >>>> >>>> -- >>>> Chuei-Ching Chiou, >>>> Ph. D student, >>>> Aerothermal & Plasma Physics Laboratory >>>> Department of Mechanical Engineering >>>> National Chiao Tung University >>>> Hsinchu 30010, TAIWAN >>>> TEL: +886-35712121 ext. 55175 >>>> E-mail: C <staystay.me99g at g2.nctu.edu.tw>CChiou2012 at gmail.com >>>> >>>> >>> >>> >>> -- >>> What most experimenters take for granted before they begin their >>> experiments is infinitely more interesting than any results to which their >>> experiments lead. >>> -- Norbert Wiener >>> >> >> >> >> -- >> Chuei-Ching Chiou, >> Ph. D student, >> Aerothermal & Plasma Physics Laboratory >> Department of Mechanical Engineering >> National Chiao Tung University >> Hsinchu 30010, TAIWAN >> TEL: +886-35712121 ext. 55175 >> E-mail: C <staystay.me99g at g2.nctu.edu.tw>CChiou2012 at gmail.com >> >> > > > -- > What most experimenters take for granted before they begin their > experiments is infinitely more interesting than any results to which their > experiments lead. > -- Norbert Wiener > -- Chuei-Ching Chiou, Ph. D student, Aerothermal & Plasma Physics Laboratory Department of Mechanical Engineering National Chiao Tung University Hsinchu 30010, TAIWAN TEL: +886-35712121 ext. 55175 E-mail: C <staystay.me99g at g2.nctu.edu.tw>CChiou2012 at gmail.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120828/c45c344d/attachment.html>
