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VDI Wissensforum GmbH - Kupplungs- und Bremssysteme für mobile und stationäre Anwendungen

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VDI Wissensforum GmbH (ed.)

Kupplungs- und Bremssysteme für mobile und stationäre Anwendungen

Series: VDI-Berichte

Volume 2414 2023

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R. Leister, B. Frohnapfel, J. Kriegseis Die Strömung in einer offenen nasslaufenden Lamellenkupplung – The fluid flow in an open wet clutch S. 99-108

„… Die Strömung in einer offenen nasslaufenden Lamellenkupplung – The fluid flow in an open wet clutch …” „… Clutch Flow Scenarios. Experiments in Fluids, 63(8): Article: 134, 2022. URL: https://doi.org/10.1007/s …” „… production) [10] R. Leister, T. Fuchs, P. Mattern, and J. Kriegseis. Flow-structure identification in a …”

C. Sax, A. Stroh, R. Leister, M. Dreisbach, J. Kriegseis, C. Denda, P. Bürk Fluid-mechanical evaluation of different clutch geometries based on experimental and numerical investigations S. 109-124

„… , prediction of the drag torque, also the fluid mechanical influences need to be considered. The flow topology …” „… classification of three-dimensional flow fields. Physics of Fluids A: Fluid Dynamics 2(5), 765–777 (1990). [9 …” „… profile-sensors for peri-odic open wet clutch flow scenarios. Experiments in Fluids 63(8) (2022). [27] Neupert, T …”

L. Pointner-Gabriel, K. Voelkel, H. Pflaum, K Stahl A Methodology for Data-driven Modeling and Prediction of the Drag Losses of Wet Clutches S. 125-154

„… differential speed due to fluid shearing. The drag torque of a wet clutch can be determined accurately and …” „… differential speed due to fluid shearing. In particular, if several clutches in a drivetrain are disengaged at …” „… (computational fluid dynamics) models, while analytical calculation models allow only a rough, but …”

Titelei/Inhaltsverzeichnis

„… offenen nasslaufenden Lamellenkupplung – The fluid flow in an open wet clutch 99R. Leister, B. Frohnapfel …” „… (ISTM)Fluid-mechanical evaluation of different clutch geometries based on experimental and numerical investigations 109C …” „… . Sax, A. Stroh, R. Leister, M. Dreisbach, J. Kriegseis, Institute of Fluid Mechanics (ISTM), Karlsruhe …”

P. Strobl, T. Schneider, K. Voelkel, K. Stahl Influence of the Steel Plate on the Friction Behavior of Automotive Wet Disk Clutches S. 21-48

„… with an overall specific oil flow rate of 0.8 mm3∙(mm2∙s)-1 with respect to the nominal friction area A …” „… Properties of Automatic Transmission Fluids: Part I - Measurement of Friction-Sliding Speed Behavior …” „… et al. (2010) Frictional Properties of Automatic Transmission Fluids: Part II - Origins of …”

doi.org/10.51202/9783181024140

Jorrid Lund - Partitioned Fluid-Structure Interaction Simulation of Maritime Applications

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Jorrid Lund

Partitioned Fluid-Structure Interaction Simulation of Maritime Applications

Series: Mechanik/Bruchmechanik

Volume 360 2024

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Fluid mechanics S. 21-34

„… assumption of an incompressible flow is not only validfor incompressible fluids, but also valid for flows …” „… flow ϱv is the product of the density ϱ and the velocity vector v. Ifa fluid is incompressible, the …” „… flowsNow, the pressure term ptI must be extracted from the fluid stress tensor Tt. For anincompressible …”

Wave energy converter S. 62-70

„… the timeintegration method in the simulation.The fluid is simulated as a two-phase flow using the …” „… the timeintegration method in the simulation.The fluid is simulated as a two-phase flow using the …” „… system.OpenFOAM [75, 97] is used to simulate the three-dimensional fluid problem with theFVM (see Sec. 3.2 …”

Submersible mixer S. 71-80

„… here are performed with panMAREon the fluid side and ANSYS on the structural side coupled by the …” „… . 67].In addition to the strain, the inflow velocity (generated by the self-induced flow caused bythe …” „… in the main flow direction (coinciding with the x-direction) – using vaneanemometers [20, p. 66 …”

Introduction S. 1-4

„… flexible structure due to a fluid flow leads to a large deformation,the deformation can have a significant …” „… effect on the fluid flow. In these cases, the mutualdependency of the fluid and the structural behavior …” „… AbstractIn this work, the benefits of the partitioned approach in the fluid-structure interaction …”

Summary and outlook S. 118-123

„… anintroduction to the theoretical basis of FSI: structural mechanics, fluid mechanics, and thecoupling of both …” „… propeller parameters in the fluid mechanics chapter.In the main part of this thesis, four different …” „… structural andthe fluid field in every time step. To this end, static condensation was employed for theFWT …”

Titelei/Inhaltsverzeichnis

„… flexible structure due to a fluid flow leads to a large deformation,the deformation can have a significant …” „… effect on the fluid flow. In these cases, the mutualdependency of the fluid and the structural behavior …” „… Lund, M. Sc.HamburgPartitioned Fluid-Structure Interaction Simulation of Maritime ApplicationsCyan …”

Floating windturbine S. 49-61

„… 4 Fluid-structure interactioncontains the displacements on the FSI interface – and for the fluid …” „… a semi-submersible foroffshore wind turbines” (HyStOH) as part of the subproject “Fluid …” „… . This also applies to the setup presented here.The setup for the fluid simulation was developed in the …”

Ship propeller S. 81-117

„… simulation setup introducedin the previous chapter. The fluid simulation is conducted with panMARE, and …” „… the fluid mesh for the FSI simulation of the KCS propeller. The suctionand the pressure surface both …” „… . panMARE is able to simulate the wake roll-up in the fluid simulation. To this end,it is helpful to include …”

Structural mechanics S. 5-20

„… and fluid problems is introduced in Chapters 2 and 3.Then, Chapter 4 serves to lay out the theoretical …” „… (Eq. (2.73)) in the post-processing.203 Fluid mechanicsThis chapter introduces the basis for the …” „… understanding of fluid mechanics and the corre-sponding methods that are commonly used for the simulation of …”

Bibliography S. 124-138

„… . Bazilevs, K. Takizawa, T. Tezduyar, Computational fluid-structure interaction:methods and applications …” „… . Bungartz, M. Schäfer (Eds.), Fluid-Structure Interaction, Modelling, Simulationand Optimisation, Vol. 53 of …” „… Lecture Notes in Computational Science and Engineering,Springer, 2006.[8] T. Richter, Fluid …”

doi.org/10.51202/9783186360182

Lars Radtke - A partitioned solution approach for fluid-structure interaction problems in the arterial system

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Lars Radtke

A partitioned solution approach for fluid-structure interaction problems in the arterial system

Series: Mechanik/Bruchmechanik

Volume 353 2020

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Bibliography S. 269-288

„… non-Newtonian fluids: A new flow equation for pseudoplastic systems”. In: Journal of Colloid Science 20.5 (1965 …” „… . 326–337. [110] R. I. Issa. “Solution of the implicitly discretised fluid flow equations by …” „… Engineering & Physics 33.1 (2011), pp. 38–46. [132] J. W. Lambert. “On the nonlinearities of fluid flow in …”

Titelei/Inhaltsverzeichnis

„… /VDI-Mitgliederpreis € 90,00. Keywords: fluid-structure interaction – blood flow – partitioned coupling – high-order …” „… structural solver for the three-dimensional fluid-structure interaction problem, a one-dimensional blood flow …” „… partitioned solution approach for fluid-structure interaction problems in the arterial system A …”

Applications S. 220-252

„… flow obtained from the vessel solver is distributed to the inlet boundary of the fluid model in terms …” „… terms of the flow, which is evaluated from the velocity by integration over the boundary. The fluid and …” „… fluid meshes for the considered arterial segments. in view of the intention of the study, which is to …”

Fluid-structure interaction in the arterial system S. 6-22

„… 2 Fluid-structure interaction in the arterial system The flow of blood through the cardiovascular …” „… fluid-structure interaction (FSI) in the arterial system, only a small segment can be simulated with such a high …” „… flow rates within different parts of the body. Let us consider an exemplary particle in the left …”

Numerical investigations S. 153-219

„… resolved model in terms of the flow prevailing at this point. Like the test simulations for the fluid …” „… flow is a standard benchmark problem for computational fluid dynamics. As illustrated in Fig. 5.36, it …” „… : Parameters for the benchmark case lid-driven cavity flow. fluid density ρf 1 kg/m3 kinematic viscosity νf …”

Introduction S. 1-5

„… computational mechanics, one is interested in the motion of solid bodies or fluids. The framework of continuum …” „… motion of fluids in regions with complex shape. Most other descriptions of mechanical phenomena evolve …” „… and sometimes it is necessary to combine different approaches. Fluid-structure interaction (FSI …”

Mechanical modeling of the arterial system S. 23-68

„… considered as the flow of a viscous fluid through a flexible structure, the problem can be stated as a …” „… the large deformations, e.g. vortices in the flow, which are common in fluid dynamics. However …” „… fluid-structure interaction in blood vessels describes the relation of flow and pressure in terms of an analogy to …”

Summary and Outlook S. 253-256

„… introduced. In addition to the fluid and the structural solver, a onedimensional blood flow solver and …” „… work. They enable three-dimensional simulations of the fluid-structure interaction (FSI) in such …” „… similar density of the fluid and structure. Accordingly, a major part of this work is concerned with the …”

Numerical methods S. 69-152

„… the fluid-structure interaction in the arterial system on different scales. The underlying equations …” „… three-dimensional fluid-structure interaction problem, is solved by the well-known finite-volume method (applied for …” „… the fluid mechanics subproblem (3.109–3.113)) and the finite element method (applied for the structure …”

doi.org/10.51202/9783186353184

Stephan Uhkötter - Untersuchung der Strömungs- und Vermischungsphänomene in schnelllaufenden hydrodynamischen Turbinengleitlagern

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Stephan Uhkötter

Untersuchung der Strömungs- und Vermischungsphänomene in schnelllaufenden hydrodynamischen Turbinengleitlagern

Series: Strömungstechnik

Volume 504 2016

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Literatur S. 136-158

„… Fluid Flow Based on the Volume of Fluid Method“. In: ICHMT Digital Library Online 13 (2008). [152] Y …” „… the Turbulent Flow in a Smooth Lid-Driven Cavity“. In: Proceedings of the ASME 2013 Fluids Engineering …” „… . Street. „On End Wall Effects in a Lid-Driven Cavity Flow“. In: Journal of Fluids Engineering 106.4 (Dez …”

Lagertaschenbetrachtung S. 59-112

„… % Positioniergenauigkeit: 5% Partikel Generator: Flow Tracker 700 CE mit einem maximalem Druck von 4,0 bar Partikel Fluid …” „… . Eine Aufskalierung und Verwendung eines abweichenden Fluids im Modell ist zulässig, da es sich sowohl …” „… experimentell nur sehr schwer nachvollziehbare Phänomene, wie die Vermischung zweier Fluide, in annehmbarer …”

doi.org/10.51202/9783186504074

VDI Wissensforum GmbH - International Conference on Gears 2023

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VDI Wissensforum GmbH (ed.)

International Conference on Gears 2023

Series: VDI-Berichte

Volume 2422 2023

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C. Kunik, J. Kunert Wetting and oil flow analysis of planetary gearboxes using oil flow simulations S. 467-484

„… analyzing the fluid flow to ensure the lubrication of all components and increase the energy efficiency of a …” „… ) to analyze the fluid flow and evaluate the power losses for a wide range of gear unit variants in …” „… the evaluation of the fluid flow of 2- & 3-stage planetary gear units dependent on different gear unit …”

F. Concli, M. N. Mastrone Latest advancements in the lubrication simulations of geared systems: a technology ready for industrial applications S. 499-518

„… lubricant fluid flow in automotive transmission,” tech. rep., SAE Technical Paper, 2014. [51] S. Deshpande …” „… Methods for Heat & Fluid Flow, 2022. [67] E. Korsukova and H. Morvan, “Preliminary CFD simulations of …” „… investigation of splashing oil flow in a hypoid gearbox,” Engineering Applications of Computational Fluid …”

M. Reichl, P. Lenz, A. Oliva Challenges and possibilities of virtual development of e-axle transmissions S. 485-498

„… Simulationszeiten von 30 Sekunden und mehr, können VOF (Volume of Fluid) basierte Methoden kaum eingesetzt werden …” „… . Optimizing the oil flow via transparent transmissions is costly and only leads to limited insights regarding …” „… the oil flow within the transmission system.Virtualization and simulative predictions are therefore …”

J. Hongu, S. Hattori, J. Kato, T. Koide Gear friction coefficient estimation using directional parameter under ATF lubricated condition S. 753-762

„… estimation equation has been applied to only the case under manual transmission fluid (MTF) lubrication …” „… transmission fluid (ATF) lubricated conditions, which is the current mainstream oil in automobiles. Herein …” „… ] proposed the modified Reynolds equation considering the surface texture, called the “Average flow model …”

M. Gebhardt, A. Rhode, B. Legrady Lubrication improvement at the HS-IS spline shaft interface of a wind turbine gearbox using the smooth particle hydrodynamic method S. 519-536

„… Volume Method (FVM), discretizes the environment in which the fluid can flow. In the presence of moving …” „… flow.VDI-Berichte Nr. 2422, 2023 5191. Introduction The failure rate of wind turbine main gearboxes in general is …” „… volume flows between models with and without ring VDI-Berichte Nr. 2422, 2023 527Fig. 10: Oil flow at …”

K. Suzuki, K. Sakai, K. Sakai, T. Hara Considerations on Lubrication of High-Speed Rotating Gear (First Report) S. 741-752

„… Hara,Univance Corporation, Washizu, Kosai-city, Shizuoka-Pref., Japan Abstract Injected oil flow toward the gear …” „… that time. In this study, it was attempted to visualize the flow of air and oil around the gear during …” „… important issues for e-Axle. 3. Visualization of the lubrication state of high-speed rotating gear The flow …”

T. König, L. Cadau, L. Steidle, M. Kley, D. Cansu Güney, J. Albrecht, K. Weber A concept for comparison of new and aged lubricants in transmissions of electric vehicles and a method of oil aging on a test rig S. 1195-1206

„… such conditions in EVs. Lubricants generally consist of a base fluid, such as mineral oil or water …” „… , and several additives added to the base fluid [9]. The composition of bio based lubricants is subject …” „… ), elemental composition and air release properties can be evaluated [12]. Fluid properties can be determined …”

M. Ruzek, R. Brun, F. Ville, P. Velex, Y. Marchesse On the reduction of windage power losses in gears by the modification of tooth geometry S. 785-800

„… modifications shown in figure 1, in order to deviate the air flow in an attempt to reduce WPL. VDI-Berichte Nr …” „… associated with the bearings, shafts and timing belt. Two gears can be mounted in order to study the air flow …” „… of the computational domain (Fig. 6). The surrounding fluid is supposed to be pure air whose physical …”

M. Werner, S. Graf, M. Oehler, O. Koch Investigation of the electrical behavior of a spur gear stage pair by means of impedance measurements S. 67-80

„… Kaiserslautern-Landau Kaiserslautern AbstractIn electric drive trains, an undesirable current flow can occur over its …” „… inverter, an undesired current flow can occur via the machine elements in the current path due to the given …” „… undesired current flow VDI-Berichte Nr. 2422, 202368on the metallic contact partners of the respective …”

M. Yilmaz, M. Ayar, F. Zerulli, K. Humm, J. König, B. Schwarz Gearbox efficiency of eDrives: correlation between measurement and calculation of load-dependent torque losses S. 985-994

„… load-dependent torque losses. The no-load torque losses are mainly a result of the oil flow in the gearbox and …” „… Gear Fluids. Springer, volume 83, pp. 327 – 337 (2019). (11) Ohlendorf, H.: Stirnradgetriebe …” „… Fluidmodelle [Calculation of bearing friction with advanced rheological fluid models]. Wilhelm Leibniz …”

F. Reinle, D. Mangherini, A. Bongiovanni Enhancing gear performance through advanced mass finishing and DEM simulation S. 1777-1786

„… fully or partially abrasive - and a process fluid, typically a mixture of water and compounds that keep …” „… ring gear process. The simulation is carried out until a steady-state flow of the media in the …” „… . Fig. 6: Ring gear and holder immersed into 7 million particles, cut of the flow in front of the part …”

W. Ramdane, C. Changenet, S. S. Ouali, C. Chevrel-Fraux, P. Casanova Thermal model of a planetary gear set using an isothermal approach S. 451-466

„… is used to solve the problem: power losses and heat flow are calculated versus time. Which leads to …” „… losses. Similar studies for splash lubricated systems are sparse. Boni [5] analyses the oil flow in an …” „… and ˙ the heat flow between the planetary gear set and its surrounding environment. Power losses …”

R. Beilicke, D. Bartel, L. Bobach Simulation-based optimization of gearing efficiency using thin coatings S. 975-984

„… more frequently to reduce fluid friction as well as churning and pumping losses. At operating …” „… gap, viscosity, thermal conductivity and specific heat capacity as well as non-Newtonian flow behavior …” „… be clearly seen that in the case of a one-sided coating, the heat flow into the coated gear is …”

U. Cihak-Bayr, T. Wopelka, C. Wintersteiger Effect of LOL conditions under high velocity and high injection temperatures S. 763-778

„… VDI-Berichte Nr. 2422, 2023770doubles. The respective lubrication gap heights normal to and in flow direction …” „… flow direction and (b) in flow direction in the middle of the disc width. Influence of topography is …” „… testing for Gear Lubricants in “Bench testing of industrial fluid lubrication and wear properties” by …”

L. Binanzer, L. Merkle, M. Dazer, A. Nicola Pitting Detection for Prognostics and Health Management in Gearbox Applications S. 97-108

„… or with constant oil flow and oil cooling and heating. In the present study, the tests are carried …” „… = 25/36 Fluid FVA reference oil No. 3 [12] Load levels according DOE test plan Pitting size in % No …”

J. Vorgerd, P. Tenberge, M. Steinrötter Scuffing load carrying capacity of high-speed gears with an isotropic superfinished surface S. 227-242

„… . Influences of roughness, fluid film thickness and tangential speed are partially considered in the …” „… gears surface in discrete times steps. In each time step the flow of frictional heat into the material …” „… conditions and ideal contact conditions. Frictional heat of the contact points flows orthogonally into the …”

E. Grabovic, A. Artoni, M. Gabiccini, E. Ciulli Exploration of trade-offs between NVH and efficiency in bevel gear design S. 853-880

„… 𝑓 and 𝑓 are the friction coefficients related to the hydrodynamic (full fluid) and the boundary …” „… of Fluid Film Lubrication. McGraw-Hill Education, ISE Editions (1994) VDI-Berichte Nr. 2422, 2023 …” „… . Furthermore, numerical noise caused Fig. 4: Flowchart of the parallelized micro-geometry optimization …”

doi.org/10.51202/9783181024225

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