Use of direct solvers in TFETI massively parallel implementation

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27240%2F13%3A86086007" target="_blank" >RIV/61989100:27240/13:86086007 - isvavai.cz</a>
Alternative codes found
RIV/61989100:27740/13:86086007
Result on the web
<a href="http://dx.doi.org/10.1007/978-3-642-36803-5_14" target="_blank" >http://dx.doi.org/10.1007/978-3-642-36803-5_14</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/978-3-642-36803-5_14" target="_blank" >10.1007/978-3-642-36803-5_14</a>

Result language
angličtina
Original language name
Use of direct solvers in TFETI massively parallel implementation
Original language description
The FETI methods blend iterative and direct solvers. The dual problem is solved iteratively using e.g. CG method; in each iteration, the auxiliary problems related to the application of an unassembled system matrix (subdomain problems' solutions and projector application in dual operator) are solved directly. The paper deals with the comparison of the direct solvers available in PETSc on the Cray XE6 machine HECToR (PETSc, MUMPS, SuperLU) regarding their performance in the two most time consuming actions in TFETI - the pseudoinverse application and the coarse problem solution. For the numerical experiments, our novel TFETI implementation in FLLOP (FETI Light Layer on top of PETSc) library was used.
Czech name
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Czech description
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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