000000485 001__ 485
000000485 005__ 20180208215100.0
000000485 0247_ $$2DOI$$a10.1016/j.cageo.2008.02.020
000000485 0247_ $$2WOS$$aWOS:000261632000030
000000485 037__ $$aPreJuSER-485
000000485 041__ $$aeng
000000485 082__ $$a550
000000485 084__ $$2WoS$$aComputer Science, Interdisciplinary Applications
000000485 084__ $$2WoS$$aGeosciences, Multidisciplinary
000000485 1001_ $$0P:(DE-Juel1)129469$$aHerbst, M.$$b0$$uFZJ
000000485 245__ $$aOn preconditioning for a parallel solution of the Richards equation
000000485 260__ $$aAmsterdam [u.a.]$$bElsevier Science$$c2008
000000485 300__ $$a1958 - 1963
000000485 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
000000485 3367_ $$2DataCite$$aOutput Types/Journal article
000000485 3367_ $$00$$2EndNote$$aJournal Article
000000485 3367_ $$2BibTeX$$aARTICLE
000000485 3367_ $$2ORCID$$aJOURNAL_ARTICLE
000000485 3367_ $$2DRIVER$$aarticle
000000485 440_0 $$019264$$aComputers & Geosciences$$v34$$x0098-3004$$y12
000000485 500__ $$aWe greatly acknowledge the John von Neumann-Institute for Computing (NIC), Julich, for providing the opportunity to use their parallel cornputing resources.
000000485 520__ $$aIn this paper, we present a class of preconditioning methods for a parallel solution of the three-dimensional Richards equation. The preconditioning methods Jacobi scaling, block-Jacobi, incomplete lower-upper, incomplete Cholesky and algebraic multigrid were applied in combination with a parallel conjugate gradient solver and tested for robustness and convergence using two model scenarios. The first scenario was an infiltration into initially dry, sandy soil discretised in 500,000 nodes. The second scenario comprised spatially distributed soil properties using 275,706 numerical nodes and atmospheric boundary conditions. Computational results showed a high efficiency of the nonlinear parallel solution procedure for both scenarios using up to 64 processors. Using 32 processors for the first scenario reduced the wall clock time to slightly more than 1% of the single processor run. For scenario 2 the use of 64 processors reduces the wall clock time to slightly more than 20% of the 8 processors wall clock time. The difference in the efficiency of the various preconditioning methods is moderate but not negligible. The use of the multigrid preconditioning algorithm is recommended, since on average it performed best for both scenarios. (c) 2008 Elsevier Ltd. All rights reserved.
000000485 536__ $$0G:(DE-Juel1)FUEK407$$2G:(DE-HGF)$$aTerrestrische Umwelt$$cP24$$x0
000000485 588__ $$aDataset connected to Web of Science
000000485 650_7 $$2WoSType$$aJ
000000485 65320 $$2Author$$aThree-dimensional
000000485 65320 $$2Author$$aMulti-processor
000000485 65320 $$2Author$$aUnsaturated flow
000000485 65320 $$2Author$$aWater flow
000000485 65320 $$2Author$$aPreconditioner
000000485 65320 $$2Author$$aMultigrid
000000485 7001_ $$0P:(DE-Juel1)VDB57509$$aGottschalk, S.$$b1$$uFZJ
000000485 7001_ $$0P:(DE-Juel1)VDB49397$$aReissel, M.$$b2$$uFZJ
000000485 7001_ $$0P:(DE-Juel1)129466$$aHardelauf, H.$$b3$$uFZJ
000000485 7001_ $$0P:(DE-Juel1)VDB724$$aKasteel, R.$$b4$$uFZJ
000000485 7001_ $$0P:(DE-Juel1)129477$$aJavaux, M.$$b5$$uFZJ
000000485 7001_ $$0P:(DE-Juel1)129548$$aVanderborght, J.$$b6$$uFZJ
000000485 7001_ $$0P:(DE-Juel1)129549$$aVereecken, H.$$b7$$uFZJ
000000485 773__ $$0PERI:(DE-600)1499977-8$$a10.1016/j.cageo.2008.02.020$$gVol. 34, p. 1958 - 1963$$p1958 - 1963$$q34<1958 - 1963$$tComputers & geosciences$$v34$$x0098-3004$$y2008
000000485 8567_ $$uhttp://dx.doi.org/10.1016/j.cageo.2008.02.020
000000485 909CO $$ooai:juser.fz-juelich.de:485$$pVDB
000000485 9131_ $$0G:(DE-Juel1)FUEK407$$bErde und Umwelt$$kP24$$lTerrestrische Umwelt$$vTerrestrische Umwelt$$x0
000000485 9141_ $$y2008
000000485 915__ $$0StatID:(DE-HGF)0010$$aJCR/ISI refereed
000000485 9201_ $$0I:(DE-Juel1)VDB793$$d31.10.2010$$gICG$$kICG-4$$lAgrosphäre$$x1
000000485 9201_ $$0I:(DE-Juel1)VDB1045$$gJARA$$kJARA-SIM$$lJülich-Aachen Research Alliance - Simulation Sciences$$x2
000000485 970__ $$aVDB:(DE-Juel1)101001
000000485 980__ $$aVDB
000000485 980__ $$aConvertedRecord
000000485 980__ $$ajournal
000000485 980__ $$aI:(DE-Juel1)IBG-3-20101118
000000485 980__ $$aI:(DE-Juel1)VDB1045
000000485 980__ $$aUNRESTRICTED
000000485 981__ $$aI:(DE-Juel1)IBG-3-20101118
000000485 981__ $$aI:(DE-Juel1)VDB1045