Kordilla, Jannes

[["dc.bibliographiccitation.firstpage","9496"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","Water Resources Research"],["dc.bibliographiccitation.lastpage","9518"],["dc.bibliographiccitation.volume","53"],["dc.contributor.author","Kordilla, Jannes"],["dc.contributor.author","Noffz, Torsten"],["dc.contributor.author","Dentz, Marco"],["dc.contributor.author","Geyer, Tobias"],["dc.contributor.author","Tartakovsky, Alexandre M."],["dc.date.accessioned","2020-12-10T14:06:18Z"],["dc.date.available","2020-12-10T14:06:18Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1002/2016WR020236"],["dc.identifier.issn","0043-1397"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/69850"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Effect of Unsaturated Flow Modes on Partitioning Dynamics of Gravity-Driven Flow at a Simple Fracture Intersection: Laboratory Study and Three-Dimensional Smoothed Particle Hydrodynamics Simulations"],["dc.title.alternative","FLOW IN UNSATURATED FRACTURED MEDIA"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.journal","Advances in Water Resources"],["dc.bibliographiccitation.lastpage","14"],["dc.bibliographiccitation.volume","59"],["dc.contributor.author","Kordilla, Jannes"],["dc.contributor.author","Tartakovsky, A. M."],["dc.contributor.author","Geyer, Tobias"],["dc.date.accessioned","2018-11-07T09:20:43Z"],["dc.date.available","2018-11-07T09:20:43Z"],["dc.date.issued","2013"],["dc.description.abstract","Flow on fracture surfaces has been identified by many authors as an important flow process in unsaturated fractured rock formations. Given the complexity of flow dynamics on such small scales, robust numerical methods have to be employed in order to capture the highly dynamic interfaces and flow intermittency. In this work we use a three-dimensional multiphase Smoothed Particle Hydrodynamics (SPH) model to simulate surface tension dominated flow on smooth fracture surfaces. We model droplet and film flow over a wide range of contact angles and Reynolds numbers encountered in such flows on rock surfaces. We validate our model via comparison with existing empirical and semi-analytical solutions for droplet flow. We use the SPH model to investigate the occurrence of adsorbed trailing films left behind droplets under various flow conditions and its importance for the flow dynamics when films and droplets coexist. It is shown that flow velocities are higher on prewetted surfaces covered by a thin film which is qualitatively attributed to the enhanced dynamic wetting and dewetting at the trailing and advancing contact lines. Finally, we demonstrate that the SPH model can be used to study flow on rough surfaces. (C) 2013 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.advwatres.2013.04.009"],["dc.identifier.isi","000323606500001"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/28942"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Sci Ltd"],["dc.relation.issn","1872-9657"],["dc.relation.issn","0309-1708"],["dc.title","A smoothed particle hydrodynamics model for droplet and film flow on smooth and rough fracture surfaces"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","3909"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","HYDROLOGY AND EARTH SYSTEM SCIENCES"],["dc.bibliographiccitation.lastpage","3923"],["dc.bibliographiccitation.volume","16"],["dc.contributor.author","Kordilla, Jannes"],["dc.contributor.author","Sauter, M."],["dc.contributor.author","Reimann, Thomas"],["dc.contributor.author","Geyer, Tobias"],["dc.date.accessioned","2018-11-07T09:14:50Z"],["dc.date.available","2018-11-07T09:14:50Z"],["dc.date.issued","2012"],["dc.description.abstract","The objective of this work is the simulation of saturated and unsaturated flow in a karstified aquifer using a double continuum approach. The HydroGeoSphere code (Therrien et al., 2006) is employed to simulate spring discharge with the Richards equations and van Genuchten parameters to represent flow in the (1) fractured matrix and (2) conduit continuum coupled by a linear exchange term. Rapid vertical small-scale flow processes in the unsaturated conduit continuum are accounted for by applying recharge boundary conditions at the bottom of the saturated model domain. An extensive sensitivity analysis is performed on single parameters as well as parameter combinations. The transient hydraulic response of the karst spring is strongly controlled by the matrix porosity as well as the van Genuchten parameters of the unsaturated matrix, which determine the head dependent inter-continuum water transfer when the conduits are draining the matrix. Sensitivities of parameter combinations partially reveal a non-linear dependence over the parameter space. This can be observed for parameters not belonging to the same continuum as well as combinations, which involve the exchange parameter, showing that results of the double continuum model may depict a certain degree of ambiguity. The application of van Genuchten parameters for simulation of unsaturated flow in karst systems is critically discussed."],["dc.identifier.doi","10.5194/hess-16-3909-2012"],["dc.identifier.isi","000310474300028"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/9516"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/27516"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Copernicus Gesellschaft Mbh"],["dc.relation.issn","1607-7938"],["dc.relation.issn","1027-5606"],["dc.rights","CC BY-NC 3.0"],["dc.rights.uri","https://creativecommons.org/licenses/by-nc/3.0"],["dc.title","Simulation of saturated and unsaturated flow in karst systems at catchment scale using a double continuum approach"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]