Lube, Gert

[["dc.bibliographiccitation.firstpage","1527"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","International Journal for Numerical Methods in Fluids"],["dc.bibliographiccitation.lastpage","1538"],["dc.bibliographiccitation.volume","40"],["dc.contributor.author","Knopp, Tobias"],["dc.contributor.author","Lube, Gert"],["dc.contributor.author","Gritzki, Ralf"],["dc.contributor.author","Rosler, M."],["dc.date.accessioned","2018-11-07T09:41:21Z"],["dc.date.available","2018-11-07T09:41:21Z"],["dc.date.issued","2002"],["dc.description.abstract","The parallel solution of the incompressible Navier-Stokes equations coupled with the energy equation is considered. For turbulent flows, the k/epsilon model together with a modified wall-function concept is used. The iterative process requires the fast solution of advection-diffusion reaction and Oseen-type problems. These linearized problems are discretized using stabilized finite element methods. We apply a coarse-granular iterative substructuring method which couples the subdomain problems via Robin-type interface conditions. Then we apply the approach to the simulation of indoor air flow problems. Copyright (C) 2002 John Wiley Sons, Ltd."],["dc.identifier.doi","10.1002/fld.409"],["dc.identifier.isi","000179931400007"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/33709"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","John Wiley & Sons Ltd"],["dc.publisher.place","W sussex"],["dc.relation.conference","Workshop on Domain Decomposition Methods in Fluid Mechanics"],["dc.relation.eventlocation","UNIV GREENWICH, LONDON, ENGLAND"],["dc.relation.issn","0271-2091"],["dc.title","Iterative substructuring methods for incompressible non-isothermal flows and its application to indoor air flow simulation"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1551"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","International Journal of Computer Mathematics"],["dc.bibliographiccitation.lastpage","1562"],["dc.bibliographiccitation.volume","85"],["dc.contributor.author","Lube, Gert"],["dc.contributor.author","Knopp, Tobias"],["dc.contributor.author","Gritzki, Ralf"],["dc.contributor.author","Roesler, M."],["dc.contributor.author","Seifert, J."],["dc.date.accessioned","2018-11-07T11:20:06Z"],["dc.date.available","2018-11-07T11:20:06Z"],["dc.date.issued","2008"],["dc.description.abstract","A framework for solving the non-isothermal unsteady Reynolds-averaged Navier-Stokes equations with emphasis on applications to thermal building simulation is prescribed in this paper. Different domain decomposition techniques are used (i) for the treatment of boundary layers, (ii) for the efficient solution of the arising linear subproblems, and (iii) for coupling the indoor air flow field with the ambient. The approach is then applied to exemplary indoor air flow configurations."],["dc.identifier.doi","10.1080/00207160802033541"],["dc.identifier.isi","000258450800006"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/55456"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Taylor & Francis Ltd"],["dc.publisher.place","Abingdon"],["dc.relation.conference","Japan-France Conference on Analytical and Numerical Methods for Scientific Computing in Science and Engineering"],["dc.relation.eventlocation","Univ Henri Poincare, Nancy, FRANCE"],["dc.relation.issn","0020-7160"],["dc.title","Application of domain decomposition methods to indoor air flow simulation"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","PII S0045-7825(02)0222-0"],["dc.bibliographiccitation.firstpage","2997"],["dc.bibliographiccitation.issue","27-28"],["dc.bibliographiccitation.journal","Computer Methods in Applied Mechanics and Engineering"],["dc.bibliographiccitation.lastpage","3013"],["dc.bibliographiccitation.volume","191"],["dc.contributor.author","Knopp, Tobias"],["dc.contributor.author","Lube, Gert"],["dc.contributor.author","Rapin, Gerd"],["dc.date.accessioned","2018-11-07T10:32:56Z"],["dc.date.available","2018-11-07T10:32:56Z"],["dc.date.issued","2002"],["dc.description.abstract","Stabilized FEM of streamline-diffusion type for advection-diffusion problems may exhibit local oscillations in crosswind direction(s). As a remedy, a shock-capturing variant of such stabilized schemes is considered as an additional consistent (but nonlinear) stabilization. We prove existence of discrete solutions. Then we present some a priori and a posteriori estimates. Finally we address the efficient solution of the arising nonlinear discrete problems. (C) 2002 Elsevier Science B.V. All rights reserved."],["dc.identifier.doi","10.1016/S0045-7825(02)00222-0"],["dc.identifier.isi","000175205100005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/44475"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Sa"],["dc.relation.issn","0045-7825"],["dc.title","Stabilized finite element methods with shock capturing for advection-diffusion problems"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1830"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Applied Numerical Mathematics"],["dc.bibliographiccitation.lastpage","1843"],["dc.bibliographiccitation.volume","58"],["dc.contributor.author","Apel, Thomas"],["dc.contributor.author","Knopp, Tobias"],["dc.contributor.author","Lube, Gert"],["dc.date.accessioned","2018-11-07T11:08:18Z"],["dc.date.available","2018-11-07T11:08:18Z"],["dc.date.issued","2008"],["dc.description.abstract","Nonstationary incompressible flow problems can be split into auxiliary problems of Oseen type. We present the analysis of conforming stabilized Galerkin methods of SUPG/PSPG-type with equal-order interpolation of velocity/pressure and with emphasis on structured anisotropic mesh refinement in boundary layers. We prove a modified inf-sup condition with a constant independent of the viscosity and of critical parameters of the mesh. Numerical tests support the results. (C) 2007 IMACS. Published by Elsevier B.V All fights reserved."],["dc.identifier.doi","10.1016/j.apnum.2007.11.016"],["dc.identifier.isi","000260388200007"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/52744"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","0168-9274"],["dc.title","Stabilized finite element methods with anisotropic mesh refinement for the Oseen problem"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","3797"],["dc.bibliographiccitation.issue","36-38"],["dc.bibliographiccitation.journal","Computer Methods in Applied Mechanics and Engineering"],["dc.bibliographiccitation.lastpage","3816"],["dc.bibliographiccitation.volume","194"],["dc.contributor.author","Knopp, Tobias"],["dc.contributor.author","Lube, Gert"],["dc.contributor.author","Gritzki, Ralf"],["dc.contributor.author","Rosler, M."],["dc.date.accessioned","2018-11-07T08:36:37Z"],["dc.date.available","2018-11-07T08:36:37Z"],["dc.date.issued","2005"],["dc.description.abstract","We consider the numerical simulation of buoyancy-affected, incompressible turbulent flows using a stabilized finite-element method. We present an approach which combines two domain decomposition methods (DDM). Firstly, we apply a DDM with full overlap for near-wall modelling, which can be interpreted as an improved wall-function concept. Secondly, a non-overlapping DDM of iteration-by-subdomains-type for the parallel solution of the linearized problems is employed. For this scheme, we demonstrate both the accuracy for a benchmark problem and the applicability to realistic indoor-air flow problems. (c) 2004 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.cma.2004.10.003"],["dc.identifier.isi","000230191000003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/18357"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Sa"],["dc.relation.issn","0045-7825"],["dc.title","A near-wall strategy for buoyancy-affected turbulent flows using stabilized FEM with applications to indoor air flow simulation"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1269"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","International Journal for Numerical Methods in Fluids"],["dc.bibliographiccitation.lastpage","1290"],["dc.bibliographiccitation.volume","57"],["dc.contributor.author","Lube, Gert"],["dc.contributor.author","Knopp, Tobias"],["dc.contributor.author","Rapin, Gerd"],["dc.contributor.author","Gritzki, Ralf"],["dc.contributor.author","Roesler, M."],["dc.date.accessioned","2018-11-07T11:12:53Z"],["dc.date.available","2018-11-07T11:12:53Z"],["dc.date.issued","2008"],["dc.description.abstract","The non-isothermal. incompressible Navier-Stokes equations with Boussineq approximation are considered as a model of turbulent indoor air flows. The transient calculation is based on the Reynolds-averaged Navier-Stokes problem L[Sing the k/epsilon-turbulence model or improved variants such as the (upsilon) over bar (2)-f model. The model is first discretized in time using backward-differencing schemes and then linearized using a Newton-type method per time step with emphasis on the proper calculation of (non-negative) turbulence quantities. The resulting auxiliary problems of Oseen type and of advection-diffusion-reaction type are solved Using stabilized finite element method of residual type. Here we summarize Some some of our recent analytical results for hi I'll er-Order methods and shock-capturing techniques. The numerical solution to the model in boundary layer regions is obtained using either adaptive wall functions if the k-epsilon model is Used or a hybrid mesh with anisotropic refinement if the (upsilon) over bar (2)-f model is applied. Besides the standard flow quantities, it is possible to calculate quantities such as the age of the air. Such quantities are Used to develop criteria for the evaluation of the efficiency of air exchange in a room. The quality of the numerical simulations is demonstrated for typical benchmark problems. Copyright (C) 2008 John Wiley & Sons, Ltd."],["dc.identifier.doi","10.1002/fld.1790"],["dc.identifier.isi","000258096300013"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/53764"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","John Wiley & Sons Ltd"],["dc.publisher.place","Chichester"],["dc.relation.conference","14th International Conference on Finite Elements in Flow Problems"],["dc.relation.eventlocation","Santa Fe, NM"],["dc.relation.issn","0271-2091"],["dc.title","Stabilized finite element methods to predict ventilation efficiency and thermal comfort in buildings"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","890"],["dc.bibliographiccitation.issue","13-16"],["dc.bibliographiccitation.journal","Computer Methods in Applied Mechanics and Engineering"],["dc.bibliographiccitation.lastpage","902"],["dc.bibliographiccitation.volume","199"],["dc.contributor.author","Knopp, Tobias"],["dc.contributor.author","Zhang, X."],["dc.contributor.author","Kessler, Roland"],["dc.contributor.author","Lube, Gert"],["dc.date.accessioned","2018-11-07T08:47:24Z"],["dc.date.available","2018-11-07T08:47:24Z"],["dc.date.issued","2010"],["dc.description.abstract","We present a validation strategy for enhancement of an unstructured industrial finite-volume solver designed for steady RANS problems for large-eddy-type simulation with near-wall modelling of incompressible high Reynolds number flow. Different parts of the projection-based discretisation are investigated to ensure LES capability of the numerical method. Turbulence model parameters are calibrated by using a minimisation of least-squares functionals for first and second order statistics of the basic benchmark problems decaying homogeneous turbulence and turbulent channel flow. Then the method is applied to the flow over a backward facing step at Re-h = 37,500. Of special interest is the role of the spatial and temporal discretisation error for low order schemes. For wall-bounded flows, present results confirm existing best practice guidelines for mesh design. For free-shear layers, a sensor to quantify the resolution quality of the LES based on the resolved turbulent kinetic energy is presented and applied to the flow over a backward facing step at Re-h = 37,500. (C) 2009 Elsevier B.V. All rights reserved"],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft (DFG) [GK 1023]"],["dc.identifier.doi","10.1016/j.cma.2009.01.005"],["dc.identifier.isi","000274827400012"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/20941"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Sa"],["dc.relation.issn","0045-7825"],["dc.title","Enhancement of an industrial finite-volume code for large-eddy-type simulation of incompressible high Reynolds number flow using near-wall modelling"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","S767"],["dc.bibliographiccitation.journal","ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK"],["dc.bibliographiccitation.lastpage","S768"],["dc.bibliographiccitation.volume","81"],["dc.contributor.author","Knopp, Tobias"],["dc.contributor.author","Lube, Gert"],["dc.contributor.author","Rapin, Gerd"],["dc.date.accessioned","2018-11-07T09:40:41Z"],["dc.date.available","2018-11-07T09:40:41Z"],["dc.date.issued","2001"],["dc.description.abstract","Stabilized FEM of streamline-diffusion type to advection-diffusion problems may exhibit local oscillations in crosswind direction(s). As a remedy, a shock-capturing variant is considered as an additional consistent (but nonlinear) stabilization. We present some preliminary results of the numerical analysis. The shock-capturing method has been applied within the numerical solution of the k/epsilon turbulence model of incompressible flow problems for the arising nonlinear advection-diffusion problems."],["dc.identifier.isi","000169246000155"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/33560"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-v C H Verlag Gmbh"],["dc.publisher.place","Berlin"],["dc.relation.conference","Annual Scientific Conference of the Society-for-Applied-Mathematics-and-Mechanics (GAMM 2000)"],["dc.relation.eventlocation","UNIV GOTTINGEN, GOTTINGEN, GERMANY"],["dc.relation.issn","0044-2267"],["dc.title","Stabilized FEM with shock-capturing for advection-diffusion problems"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]