Search Results - "Wegener, Raimund"

Industrial dry spinning processes: algorithmic for a two-phase fiber model in airflows by Wieland, Manuel, Arne, Walter, Marheineke, Nicole, Wegener, Raimund

“…The dry spinning of fibers can be described by three-dimensional multi-phase flow models that contain key effects like solvent evaporation and fiber-air…”
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Graph-based tensile strength approximation of random nonwoven materials by interpretable regression by Antweiler, Dario, Harmening, Marc, Marheineke, Nicole, Schmeißer, Andre, Wegener, Raimund, Welke, Pascal

“…Nonwoven materials consist of random fiber structures. They are essential to diverse application areas such as clothing, insulation and filtering. A long term…”
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Modeling and simulation of curved fibers in dry spinning scenarios by Wieland, Manuel, Arne, Walter, Marheineke, Nicole, Wegener, Raimund

“…Dry spinning is characterized by the simultaneous production of multiple thin polymeric fibers in airflows and the evaporation of the solvent contained in…”
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Random Field Sampling for a Simplified Model of Melt-Blowing Considering Turbulent Velocity Fluctuations by Hübsch, Florian, Marheineke, Nicole, Ritter, Klaus, Wegener, Raimund

“…In melt-blowing very thin liquid fiber jets are spun due to high-velocity air streams. In literature there is a clear, unsolved discrepancy between the…”
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An Energy Conserving Numerical Scheme for the Dynamics of Hyperelastic Rods by Fütterer, Thorsten, Klar, Axel, Wegener, Raimund

“…A numerical method for special Cosserat rods based on Antman's description Antman, 2005 is developed for hyperelastic materials and potential forces. This…”
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Modeling and application of a stochastic drag for fibers in turbulent flows by Marheineke, Nicole, Wegener, Raimund

“…Considering the dynamics of long slender elastic fibers in turbulent flows, there exists a stochastic aerodynamic force concept for a general drag model based…”
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Viscoelastic model hierarchy for fiber melt spinning of semi-crystalline polymers by Ettmüller, Manuel, Arne, Walter, Marheineke, Nicole, Wegener, Raimund

“…In the fiber melt spinning of semi-crystalline polymers, the degree of crystallization can be non-homogeneous over the cross-section of the fiber, affecting…”
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Efficient graph‐based tensile strength simulations of random fiber structures by Harmening, Marc, Marheineke, Nicole, Wegener, Raimund

“…In this paper, we propose a model‐simulation framework for virtual tensile strength testing of random fiber structures, such as those in nonwoven materials…”
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Melt-blowing of viscoelastic jets in turbulent airflows: Stochastic modeling and simulation by Wieland, Manuel, Arne, Walter, Marheineke, Nicole, Wegener, Raimund

“…In melt-blowing processes micro- and nanofibers are produced by the extrusion of polymeric jets into a directed, turbulent high-speed airflow. Up to now the…”
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On flow-enhanced crystallization in fiber spinning: Asymptotically justified boundary conditions for numerics of a stiff viscoelastic two-phase model by Ettmüller, Manuel, Arne, Walter, Marheineke, Nicole, Wegener, Raimund

“…For flow-enhanced crystallization in fiber spinning, the viscoelastic two-phase fiber models by Doufas et al. (2000) and Shrikhande et al. (2006) are state of…”
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An efficient numerical framework for fiber spinning scenarios with evaporation effects in airflows by Wieland, Manuel, Arne, Walter, Feßler, Robert, Marheineke, Nicole, Wegener, Raimund

“…In many spinning processes, as for example in dry spinning, solvent evaporates out of the spun jets and leads to thinning and solidification of the produced…”
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Finite volume approach for the instationary Cosserat rod model describing the spinning of viscous jets by Arne, Walter, Marheineke, Nicole, Meister, Andreas, Schiessl, Stefan, Wegener, Raimund

“…The spinning of slender viscous jets can be asymptotically described by one-dimensional models that consist of systems of partial and ordinary differential…”
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Product integration method for the simulation of radial effects in fiber melt spinning of semi‐crystalline polymers by Ettmüller, Manuel, Arne, Walter, Marheineke, Nicole, Wegener, Raimund

“…In this work we consider the simulation of a mixed‐dimensional model for viscous fiber melt spinning of semi‐crystalline polymers including radial effects on…”
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Tensile Strength Simulations of Nonwoven Fiber Materials by Harmening, Marc, Marheineke, Nicole, Wegener, Raimund

“…For airlay manufactured nonwoven materials we present a model which enables efficient tensile strength simulations using virtually generated fiber structure…”
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Asymptotically Justified Boundary Conditions for a Viscoelastic Two‐Phase Fiber Model by Ettmüller, Manuel, Arne, Walter, Marheineke, Nicole, Wegener, Raimund

“…In this work we present asymptotically justified boundary/interface conditions for a viscoelastic two‐phase fiber model with flow‐enhanced crystallization…”
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WHIPPING OF ELECTRIFIED VISCO-CAPILLARY JETS IN AIRFLOWS by ARNE, WALTER, MARHEINEKE, NICOLE, PÉREZ-SABORID, MIGUEL, RIVERO-RODRÍGUEZ, JAVIER, WEGENER, RAIMUND, WIELAND, MANUEL

“…An electrified visco-capillary jet shows different dynamic behavior, such as cone forming, breakage into droplets, and whipping and coiling, depending on the…”
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Fiber Dynamics in Turbulent Flows: Specific Taylor Drag by Marheineke, Nicole, Wegener, Raimund

“…In [N. Marheineke and R. Wegener, SIAM J. Appl. Math., 66 (2006), pp. 1703-1726], an aerodynamic force concept for a general air drag model based on a…”
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Model hierarchy of upper‐convected Maxwell models with regard to simulations of melt‐blowing processes by Wieland, Manuel, Arne, Walter, Marheineke, Nicole, Wegener, Raimund

“…In melt‐blowing processes, polymeric jets are extruded into turbulent high‐speed airflow to produce fibers of micro‐ and nano‐scale. String models supplemented…”
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Smooth convolution-based distance functions by Schmeißer, Andre, Wegener, Raimund, Hietel, Dietmar, Hagen, Hans

“…•Smoothing a triangle mesh by constructing an implicit convolution-based surface.•Both the convolution kernel and the implicitization of the mesh are…”
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Product integration method for simulation of radial effects in dry spinning processes by Wieland, Manuel, Arne, Walter, Feßler, Robert, Marheineke, Nicole, Wegener, Raimund

“…Industrial dry spinning processes are crucially determined by the interaction of the spun fibers with the surrounding airflow as well as the radial effects of…”
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