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Showing 1 to 20 of 36 for “"Strömungssimulation"”.
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Automatisierte Geometrieaufbereitung digitaler 3D-Stadtmodelle für die Strömungssimulation
… Das Anwendungsszenario stellt die numerische Strömungssimulation dar. Hierzu wurden exemplarische Windsimulationen für die Stadtmodelle durchgeführt.
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Kenngrößenorientierte Beurteilung von Rotationsblutpumpen diagonaler Bauart mittels numerischer Strömungssimulation
The aim of this work was to analyse the flow phenomena within the implantable rotary blood pump “MikroDiagonalPump” (MDP) by means of Computational Fluid Dynamics (CFD). In the first part, a method has been developed to evaluate different pump geometries and impeller variations in a standardised …
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Zur Strömungssimulation in Einzelklüften: Gegenüberstellung von numerischen Methoden und Experiment
Scientific research in the field of flow and transport processes in fractured rock is of high relevance due to the frequent occurrence of fractures in geological formations. For this reason, fracture flow problems are addressed in many fields of engineering tasks. Based on results of numerical …
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Effiziente Simulation komplexer Strömungen auf semi-strukturierten Gittern
… erzielen. Zur Beschleunigung der Strömungssimulation mit dem SIMPLE-Algorithmus wird in der vorliegenden Arbeit ein modifiziertes Full Multigrid (FMG) Verfahren mit V-Zyklus entwickelt, bei dem die Startlösung inklusive der Turbulenzvariablen nicht vom feinen Gitter …
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Numerische Simulation der Strömung in Miniaturkreiselpumpen zur Blutförderung
New operation techniques on patients undergoing cardiovascular surgery or short-term ventricular assistance have lead to the development of a new generation of blood pumps with minimal size. This development is mainly focussed on hydraulic performance and biocompatibility. This thesis covers the …
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Modeling and simulation of dispersed two-phase flow transport phenomena in electrochemical processes
Modeling the physics of two-phase flows and the development of numerical tools for their simulation are important challenges in modern CFD. Contrary to single-phase flows, where the underlying physics is quite well understood and relatively general numerical methods can be employed in flow …
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Erschließung der automatischen Strömungsoptimierung zur Lösung von Gestaltungsaufgaben im Wasserbau
Today, numerical flow models are widely used tools in hydraulic engineering, as for the design of turbine intakes. In this field, problems are often closely linked to the question of an optimal solution depending on various influences. With the connection of an optimization algorithm and a flow …
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Eine numerische Methode zur Bestimmung erweiterter flugdynamischer Derivativa durch aerostrukturdynamische Simulation
Starting from a Finite-Volume Method solving the Navier-Stokes equations for compressible fluid flow and a Finite-Element Method based on quasi one-dimensional Timoshenko beam elements for structural dynamics, a numerical method for coupled aeroelastic problems of flight vehicles is developed. …
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Kopplungswerkzeuge für aeroelastische Simulationen
The direct numerical simulation of fluid-structure-interaction has received a lot of attention in recent years. Due to the growing size of planned commercial airplanes and the widespread use of lightweight-structures leading to large elastic deflections in flight, great interest of commercial …
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Widerstandsverteilung in Schaltlichtbögen von Selbstblasleistungsschaltern während der Stromnulldurchgangsphase
SF6 self-blast circuit breakers are widely used as switching elements in electrical power systems. In case of a short-circuit fault the breaker contacts are separated leading to an ignition of an electric arc. Hence, the current flow is carried by the electric arc itself. Due to a cooling of the …
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Efficient indexing and view dependent ranking in CFD databases
Methods numerically simulating the interaction of gases or fluids with complex surfaces (computational fluid dynamics, CFD) are able to perform calculations with increasing levels of detail due to the ongoing development of more powerful computers. CFD simulations are utilized during the design of …
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Unstructured h-adaptive finite volume schemes for compressible viscous fluid flow
The current thesis presents a novel methodology for solving the Euler and Reynolds-averaged Navier-Stokes equations for compressible fluid flow. The central objective of the presented research is to realize adaptively generated discretizations that are able to resolve the physically relevant …
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