Lukas Ostrowski
University of Stuttgart
Rank (linear algebra)Porous mediumCouplingPhase (waves)Series (mathematics)PhysicsPotential energy surfaceMathematical analysisDissipationOperator (physics)Computational chemistryNonlinear systemSet (abstract data type)Boundary value problemField (physics)VibrationConfiguration interactionMaxwell–Stefan diffusionMathematicsFlow (mathematics)MechanicsContact anglePotential energyCompressibilityInviscid flowDecomposition (computer science)Discontinuous Galerkin methodDissipative system
5Publications
2H-index
17Citations
Publications 6
Newest
#1Francesco Carlo Massa (University of Bergamo)H-Index: 5
#2Lukas Ostrowski (University of Stuttgart)H-Index: 2
Last. Christian Rohde (University of Stuttgart)H-Index: 19
view all 4 authors...
Abstract null null In this work we present a novel exact Riemann solver for an artificial Equation of State (EoS) based modification of the incompressible Euler equations. Differently from the well known artificial compressibility method, this new approach overcomes the lack of the pressure-velocity coupling by using a suitably designed artificial EoS. The modified set of equations fits into the framework of first order hyperbolic conservation laws. Accordingly, an exact Riemann solver is derive...
Source
#1Lukas Ostrowski (University of Stuttgart)H-Index: 2
#2Christian Rohde (University of Stuttgart)H-Index: 19
Source
#1Lukas Ostrowski (University of Stuttgart)H-Index: 2
#2Francesco Carlo Massa (University of Bergamo)H-Index: 5
Last. Christian Rohde (University of Stuttgart)H-Index: 19
view all 3 authors...
We consider the impingement of a droplet onto a wall with high impact speed. To model this process we favour a diffuse-interface concept. Precisely, we suggest a compressible Navier--Stokes--Allen--Cahn model. Basic properties of the model are discussed. To cope with the fluid-wall interaction, we derive thermodynamically consistent boundary conditions that account for dynamic contact angles. We briefly discuss an discontinuous Galerkin scheme which approximates the energy dissipation of the sys...
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We introduce a Darcy-scale model to describe compressible multi-component flow in a fully saturated porous medium. In order to capture cross-diffusive effects between the different species correctly, we make use of the Maxwell--Stefan theory in a thermodynamically consistent way. For inviscid flow the model turns out to be a nonlinear system of hyperbolic balance laws. We show that the dissipative structure of the Maxwell-Stefan operator permits to guarantee the existence of global classical sol...
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#1Lukas OstrowskiH-Index: 2
Source
#1Lukas Ostrowski (University of Stuttgart)H-Index: 2
#2Benjamin Ziegler (University of Stuttgart)H-Index: 6
Last. Guntram Rauhut (University of Stuttgart)H-Index: 39
view all 3 authors...
In order to reduce the operation count in vibration correlation methods, e.g., vibrational configuration interaction (VCI) theory, a tensor decomposition approach has been applied to the analytical representations of multidimensional potential energy surfaces (PESs). It is shown that a decomposition of the coefficients within the individual n-mode coupling terms in a multimode expansion of the PES is feasible and allows for convenient contractions of one-dimensional integrals with these newly de...
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