About: ALGORITHMS FOR SOLVING DARCIAN FLOW IN STRUCTURED POROUS MEDIA

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	https://ojs.cvut.cz/ojs/index.php/ap/article/view/1829/1661
Description	This paper presents several algorithms that were implemented in DRUtES [1], a new open source project. DRUtES is a ﬁnite element solver for coupled nonlinear parabolic problems, namely the Richards equation with the dual porosity approach (modeling the ﬂow of liquids in a porous medium). Mass balance consistency is crucial in any hydrological balance and contaminant transportation evaluations. An incorrect approximation of the mass term greatly depreciates the results that are obtained. An algorithm for automatic time step selection is presented, as the proper time step length is crucial for achieving accuracy of the Euler time integration method. Various problems arise with poor conditioning of the Richards equation: the computational domain is clustered into subregions separated by a wetting front, and the nonlinear constitutive functions cover a high range of values, while a very simple diagonal preconditioning method greatly improves the matrix properties. The results are presented here, together with an analysis. This paper presents several algorithms that were implemented in DRUtES [1], a new open source project. DRUtES is a ﬁnite element solver for coupled nonlinear parabolic problems, namely the Richards equation with the dual porosity approach (modeling the ﬂow of liquids in a porous medium). Mass balance consistency is crucial in any hydrological balance and contaminant transportation evaluations. An incorrect approximation of the mass term greatly depreciates the results that are obtained. An algorithm for automatic time step selection is presented, as the proper time step length is crucial for achieving accuracy of the Euler time integration method. Various problems arise with poor conditioning of the Richards equation: the computational domain is clustered into subregions separated by a wetting front, and the nonlinear constitutive functions cover a high range of values, while a very simple diagonal preconditioning method greatly improves the matrix properties. The results are presented here, together with an analysis. (en)
Title	ALGORITHMS FOR SOLVING DARCIAN FLOW IN STRUCTURED POROUS MEDIA ALGORITHMS FOR SOLVING DARCIAN FLOW IN STRUCTURED POROUS MEDIA (en)
skos:prefLabel	ALGORITHMS FOR SOLVING DARCIAN FLOW IN STRUCTURED POROUS MEDIA ALGORITHMS FOR SOLVING DARCIAN FLOW IN STRUCTURED POROUS MEDIA (en)
skos:notation	RIV/68407700:21110/13:00215620!RIV14-MSM-21110___
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GP13-11977P)
http://linked.open...iv/cisloPeriodika	4
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Mayer, Petr
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	České vysoké učení technické v Praze / Fakulta stavební
http://linked.open...dnocenehoVysledku	60073
http://linked.open...ai/riv/idVysledku	RIV/68407700:21110/13:00215620
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Richards equation; time step adaptivity; distinct unsaturated hydraulic properties; problem conditioning; diagonal preconditioner (en)
http://linked.open.../riv/klicoveSlovo	diagonal preconditioner distinct unsaturated hydraulic properties problem conditioning Richards equation time step adaptivity
http://linked.open...odStatuVydavatele	CZ - Česká republika
http://linked.open...ontrolniKodProRIV	[EF6AE94E8C34]
http://linked.open...i/riv/nazevZdroje	Acta Polytechnica
http://linked.open...in/vavai/riv/obor	BA
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	Metoda adaptivní časové dekompozice pro řešení úloh Richardsovy rovnice v porézním prostředí vykazující kontrastní hydraulické charakteristiky.
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	53
http://linked.open...iv/tvurceVysledku	Kuráž, M. Mayer, Petr
issn	1210-2709
number of pages	12 (xsd:int)
http://localhost/t...ganizacniJednotka	21110

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