Norbert Hosters
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View article: Computational Model of Coronary Arteries with In-Stent Restenosis: Mutual Influence of Hemodynamics, Growth Mechanics and Pharmacokinetics
Computational Model of Coronary Arteries with In-Stent Restenosis: Mutual Influence of Hemodynamics, Growth Mechanics and Pharmacokinetics Open
Despite advances in stent technology, in-stent restenosis remains a critical challenge following percutaneous coronary intervention. In this work, we propose a comprehensive fluid-solid computational model to simulate restenosis after drug…
View article: Spline‐Based Framework for Microscopic Contact Zone Modeling in Lubricated Orthogonal Cutting
Spline‐Based Framework for Microscopic Contact Zone Modeling in Lubricated Orthogonal Cutting Open
Accurately predicting the coefficient of friction between tool, chip, and workpiece during machining is essential for a reliable and cost‐effective process. In this context, current numerical methods are often based on homogenized approach…
View article: Trainable embedding quantum physics informed neural networks for solving nonlinear PDEs
Trainable embedding quantum physics informed neural networks for solving nonlinear PDEs Open
This paper proposes a novel approach for solving nonlinear partial differential equations (PDEs) with a quantum computer, the trainable embedding quantum physics informed neural network (TE-QPINN). We combine quantum machine learning (QML)…
View article: Trainable Embedding Quantum Physics Informed Neural Networks for Solving Nonlinear PDEs
Trainable Embedding Quantum Physics Informed Neural Networks for Solving Nonlinear PDEs Open
This paper proposes a novel approach for solving nonlinear partial differential equations (PDEs) with a quantum computer, the trainable embedding quantum physics informed neural network (TE-QPINN). We combine quantum machine learning (QML)…
View article: On the number of subproblem iterations per coupling step in partitioned fluid‐structure interaction simulations
On the number of subproblem iterations per coupling step in partitioned fluid‐structure interaction simulations Open
In literature, the cost of a partitioned fluid‐structure interaction scheme is typically assessed by the number of coupling iterations required per time step, while ignoring the internal iterations within the nonlinear subproblems. In this…
View article: Multiphase Flow Simulation of Blow-by and Fuel-in-Oil Dilution via the Piston Ring Pack Using the CFD Level-Set Method
Multiphase Flow Simulation of Blow-by and Fuel-in-Oil Dilution via the Piston Ring Pack Using the CFD Level-Set Method Open
Modern diesel engines temporarily use a very late post-injection in the combustion cycle to either generate heat for a diesel particulate filter regeneration or purge a lean NOx trap. In some configurations, unburned fuel is left at the cy…
View article: A new approach towards assessing convergence of partitioned fluid-structure interaction simulations
A new approach towards assessing convergence of partitioned fluid-structure interaction simulations Open
A partitioned algorithm couples distinct solvers by exchanging data on their common interface. In the case of strong coupling, where multiple coupling iterations are performed per time step, a convergence criterion is required to indicate …
View article: Decision Support for the Optimization of Continuous Processesusing Digital Shadows
Decision Support for the Optimization of Continuous Processesusing Digital Shadows Open
Decision support systems can provide real-time process information and correlations, which in turn assists process experts in making decisions and thus further increase productivity. This also applies to well-established and already highly…
View article: Shape‐optimization of extrusion‐dies via parameterized physics‐informed neural networks
Shape‐optimization of extrusion‐dies via parameterized physics‐informed neural networks Open
In this paper, we present an approach to efficiently optimize the design of extrusion dies. Extrusion dies, which are relevant to the manufacturing process of plastics profile extrusion, traditionally require time‐consuming iterations betw…
View article: Numerical Analysis and Reduced‐Order Modeling of Plastic Profile Extrusion Processes
Numerical Analysis and Reduced‐Order Modeling of Plastic Profile Extrusion Processes Open
We present the data‐driven standardized non‐intrusive reduced‐order modeling strategy, sniROM, applied in context of plastics profile extrusion. After a brief introduction to the process and the governing physics, we give a short overview …
View article: Time‐continuous and time‐discontinuous space‐time finite elements for advection‐diffusion problems
Time‐continuous and time‐discontinuous space‐time finite elements for advection‐diffusion problems Open
We construct four variants of space‐time finite element discretizations based on linear tensor‐product and simplex‐type finite elements. The resulting discretizations are continuous in space, and continuous or discontinuous in time. In a f…
View article: On the number of subproblem iterations per coupling step in partitioned fluid-structure interaction simulations
On the number of subproblem iterations per coupling step in partitioned fluid-structure interaction simulations Open
In literature, the cost of a partitioned fluid-structure interaction scheme is typically assessed by the number of coupling iterations required per time step, while ignoring the internal iterations within the nonlinear subproblems. In this…
View article: The effect of the number of subproblem iterations in partitioned fluid-structure interaction simulation
The effect of the number of subproblem iterations in partitioned fluid-structure interaction simulation Open
In a partitioned fluid-structure interaction simulation separate flow and structure solvers, each with their own spatial domain, are coupled by exchanging data on the common interface.\nIts computational cost is dominated by the execution …
View article: Decision Support for the Optimization of Continuous Processes using Digital Shadows
Decision Support for the Optimization of Continuous Processes using Digital Shadows Open
Decision support systems can provide real-time process information and correlations, which in turn assists process experts in making decisions and thus further increase productivity. This also applies to well-established and already highly…
View article: Decision Support for the Optimization of Continuous Processes using Digital Shadows
Decision Support for the Optimization of Continuous Processes using Digital Shadows Open
Decision support systems can provide real-time process information and correlations, which in turn assists process experts in making decisions and thus further increase productivity. This also applies to well-established and already highly…
View article: A Robin‐Neumann scheme with quasi‐Newton acceleration for partitioned fluid‐structure interaction
A Robin‐Neumann scheme with quasi‐Newton acceleration for partitioned fluid‐structure interaction Open
The Dirichlet–Neumann scheme is the most common partitioned algorithm for fluid‐structure interaction (FSI) and offers high flexibility concerning the solvers employed for the two subproblems. Nevertheless, it is not without shortcomings: …
View article: A Data-driven Reduced Order Modeling Approach Applied In Context Of Numerical Analysis And Optimization Of Plastic Profile Extrusion
A Data-driven Reduced Order Modeling Approach Applied In Context Of Numerical Analysis And Optimization Of Plastic Profile Extrusion Open
In course of this work, we examine the process of plastic profile extrusion, where a polymer melt is shaped inside the so-called extrusion die and fixed in its shape by solidification in the downstream calibration unit. More precise, we fo…
View article: Time-Continuous and Time-Discontinuous Space-Time Finite Elements for Advection-Diffusion Problems
Time-Continuous and Time-Discontinuous Space-Time Finite Elements for Advection-Diffusion Problems Open
We construct four variants of space-time finite element discretizations based on linear tensor-product and simplex-type finite elements. The resulting discretizations are continuous in space, and continuous or discontinuous in time. In a f…
View article: Numerical Prediction and Post-Test Numerical Analysis of the ASDMAD Wind Tunnel Tests in ETW
Numerical Prediction and Post-Test Numerical Analysis of the ASDMAD Wind Tunnel Tests in ETW Open
This paper presents numerical results in comparison with experimental data of nominally static aeroelastic polars of the second ASDMAD (Aero-Structural Dynamics Methods for Airplane Design) campaign conducted in the European Transonic Wind…
View article: A Robin-Neumann Scheme with Quasi-Newton Acceleration for Partitioned Fluid-Structure Interaction
A Robin-Neumann Scheme with Quasi-Newton Acceleration for Partitioned Fluid-Structure Interaction Open
The Dirichlet-Neumann scheme is the most common partitioned algorithm for fluid-structure interaction (FSI) and offers high flexibility concerning the solvers employed for the two subproblems. Nevertheless, it is not without shortcomings: …
View article: Spline-Based Space-Time Finite Element Approach for Fluid-Structure Interaction Problems With a Focus on Fully Enclosed Domains
Spline-Based Space-Time Finite Element Approach for Fluid-Structure Interaction Problems With a Focus on Fully Enclosed Domains Open
Non-Uniform Rational B-Spline (NURBS) surfaces are commonly used within Computer-Aided Design (CAD) tools to represent geometric objects. When using isogeometric analysis (IGA), it is possible to use such NURBS geometries for numerical ana…
View article: Investigation of Physics-Informed Deep Learning for the Prediction of Parametric, Three-Dimensional Flow Based on Boundary Data
Investigation of Physics-Informed Deep Learning for the Prediction of Parametric, Three-Dimensional Flow Based on Boundary Data Open
The placement of temperature sensitive and safety-critical components is crucial in the automotive industry. It is therefore inevitable, even at the design stage of new vehicles that these components are assessed for potential safety issue…
View article: Four‐dimensional elastically deformed simplex space‐time meshes for domains with time‐variant topology
Four‐dimensional elastically deformed simplex space‐time meshes for domains with time‐variant topology Open
Considering the flow through biological or engineered valves as an example, there is a variety of applications in which the topology of a fluid domain changes over time. This topology change is characteristic for the physical behavior, but…
View article: The Performance Impact of Newton Iterations per Solver Call in\n Partitioned Fluid-Structure Interaction
The Performance Impact of Newton Iterations per Solver Call in\n Partitioned Fluid-Structure Interaction Open
The cost of a partitioned fluid-structure interaction scheme is typically\nassessed by the number of coupling iterations required per time step, while\nignoring the Newton loops within the nonlinear sub-solvers. In this work, we\ndiscuss w…
View article: Advantages of spline-based interfaces for fluid-structure interaction in balloon-type problems
Advantages of spline-based interfaces for fluid-structure interaction in balloon-type problems Open
Inflating Balloon-type problems are characterized by two numerical challenges: First, a deviation of the geometry, e.g., caused by discretization, can have a dramatic influence on the numerical result.Second, the composition of the boundar…
View article: Performance Impact of the Newton Iterations per Solver Call in Partitioned Fluid-Structure Interaction
Performance Impact of the Newton Iterations per Solver Call in Partitioned Fluid-Structure Interaction Open
The cost of a partitioned fluid-structure interaction scheme is typically assessed by the number of coupling iterations required per time step, while ignoring the Newton loops within the nonlinear sub-solvers. In this work, we discuss why …