MBtech Group

Fellbach, Germany

MBtech Group

Fellbach, Germany
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Agency: European Commission | Branch: FP7 | Program: JTI-CP-ARTEMIS | Phase: SP1-JTI-ARTEMIS-2010-1 | Award Amount: 32.25M | Year: 2011

One of the most important strategic sectors in which Europe is developing, integrating and delivering high-quality products is the transportation domain. Here, high-class safety-related products as e.g. airplanes, cars and trains have a huge market impact. More and more of the market value of these vehicles is gained by embedded systems inside these products, and the number and importance of these embedded systems is steadily growing. One of the most important enablers to assure the quality of embedded systems is the application of powerful validation and verification (V&V) technologies accompanying the embedded systems development process. Unfortunately, the V&V technologies already in industrial use are still too expensive while often not effective enough. MBAT will provide European industry with a new leading-edge V&V technology in form of a Reference Technology Platform (MBAT RTP) that will enable the production of high-quality and safe embedded systems at reduced cost in terms of time and money. This will be made possible by a new and very promising approach in which model-based testing technologies will be combined with static analysis techniques. Besides this combination, a further new approach is to use (and re-use) specially designed test & analysis models as basis for model-based V&V. This advanced model-based V&V technology will lead to a more effective and at the same time cost-reducing approach compared to traditional ones. In addition, MBAT RTP will be connected to other ARTEMIS RTPs to extend existing platforms. Developed by industrial key players (large companies and SMEs) in this domain and supported by leading research partners, the MBAT RTP will be of high value for the European industry, providing very effective means to assure utmost quality embedded systems at reduced costs. Version approved by the ARTEMIS JU on 07/12/2011

Avramenko A.A.,Ukrainian Academy of Sciences | Blinov D.G.,Ukrainian Academy of Sciences | Shevchuk I.V.,MBtech Group
Physics of Fluids | Year: 2011

Processes of heat, momentum, and concentration transport in a boundary layer of a nanofluid near a flat wall were studied. The study was performed by means of numerical analysis of boundary layer equations in a self-similar form. Self-similar forms of these equations were obtained based on symmetry properties (Lie groups). In doing so, dependence of physical properties (viscosity, thermal conductivity, and diffusion coefficient) on concentration of nanofluids and temperature were taken into account. Effects of concentration of the nano-particles on velocity and temperature profiles, as well as on the relative Nusselt numbers and skin-friction coefficients, were elucidated. © 2011 American Institute of Physics.

Avramenko A.A.,Ukrainian Academy of Sciences | Shevchuk I.V.,MBtech Group | Tyrinov A.I.,Ukrainian Academy of Sciences | Blinov D.G.,Ukrainian Academy of Sciences
Applied Thermal Engineering | Year: 2014

Processes of momentum, heat and mass transfer at the condensation of the stationary vapor with nanoparticles near a vertical plate were investigated using an approximate analytical model. This model extends the classical model of Nusselt by way of the inclusion of an equation for the nanoparticle concentration and a dependence of the nanofliud density on the nanoparticles concentration. Thus, mechanisms of the Brownian and thermophoretic diffusion are incorporated. The essential novelty lies in the identification of three main dimensionless parameters, which describe the influence of nanoparticles on heat transfer and fluid flow. They are (i) the parameter A that denotes the relation between the mechanisms of the thermophoretic and Brownian diffusion, (ii) the concentration φ∞ of nanoparticles in the vapor, and (iii) the ratio R of the densities of the nanoparticles and the fluid. Novel analytical solutions were derived that describe velocity profiles, the mass flow rate and the thickness of the film as the functions of the parameters A, φ∞ and R. Finally, a novel analytical solution for the normalized Nusselt number was obtained as a function of the aforementioned three dimensionless parameters. An increase in each of these parameters causes an increase in the normalized Nusselt number. © 2014 Elsevier Ltd. All rights reserved.

Avramenko A.A.,Ukrainian Academy of Sciences | Tyrinov A.I.,Ukrainian Academy of Sciences | Shevchuk I.V.,MBtech Group
Physics of Fluids | Year: 2015

The paper presents results of an investigation of the response of an incompressible fluid in a circular micropipe and a parallel-plate microchannel to a sudden time-independent pressure drop. Solutions of the problem were obtained analytically using the Laplace transform technique and numerically using the lattice Boltzmann method. The unsteady velocity profiles in the pipe and in the channel were obtained with the help of the infinite series solutions validated against numerical simulations. In line with the expectations, the flow asymptotically tends to the fully developed pattern, which is attained quicker for smaller Knudsen numbers. The solution enabled also obtaining relations to estimate the hydraulic resistance coefficient. © 2015 AIP Publishing LLC.

Harmand S.,University of Lille Nord de France | Harmand S.,University of Valenciennes and Hainaut‑Cambresis | Pelle J.,University of Lille Nord de France | Pelle J.,University of Valenciennes and Hainaut‑Cambresis | And 2 more authors.
International Journal of Thermal Sciences | Year: 2013

Fluid flow and convective heat transfer in rotor-stator configurations, which are of great importance in different engineering applications, are treated in details in this review. The review focuses on convective heat transfer in predominantly outward air flow in the rotor-stator geometries with and without impinging jets and incorporates two main parts, namely, experimental/theoretical methodologies and geometries/results. Experimental methodologies include naphthalene sublimation techniques, steady-state (thin layer) and transient (thermochromic liquid crystals) thermal measurements, thermocouples and infra-red cameras, hot-wire anemometry, laser Doppler and particle image velocimetry, laser plane and smoke generator. Theoretical approaches incorporate modern CFD computational tools (DNS, LES, RANS etc). Geometries and results part being mentioned starting from simple to complex elucidates cases of a free rotating disk, a single disk in the crossflow, single jets impinging onto stationary and rotating disk, rotor-stator systems without and with impinging single jets, as well as multiple jets. Conclusions to the review outline perspectives of the further extension of the investigations of different kinds of the rotor-stator systems and their applications in engineering practice. © 2012 Elsevier Masson SAS. All rights reserved.

Avramenko A.A.,Ukrainian Academy of Sciences | Blinov D.G.,Ukrainian Academy of Sciences | Shevchuk I.V.,MBtech Group | Kuznetsov A.V.,North Carolina State University
Physics of Fluids | Year: 2012

Heat, momentum, and mass transport in turbulent boundary layer nanofluid flow over a flat plate were investigated. Boundary layer equations were reduced to self-similar forms and solved numerically. The Lie group technique, which is based on the symmetry properties of governing equations, was used to derive self-similar forms of these equations. Turbulent viscosity was predicted using the mixing-length model. Also, dependences of physical properties (viscosity, thermal conductivity, and diffusion coefficients) on the nanofluid concentration and temperature were accounted for. Influences of different dimensionless parameters and nanoparticle concentration on the velocity and temperature profiles, as well as on the relative Nusselt number and skin-friction coefficient, were investigated. © 2012 American Institute of Physics.

Fasquelle A.,Jeumont Electrical | Pelle J.,University of Lille Nord de France | Pelle J.,University of Valenciennes and Hainaut‑Cambresis | Harmand S.,University of Valenciennes and Hainaut‑Cambresis | Shevchuk I.V.,MBtech Group
Journal of Heat Transfer | Year: 2014

Cooling of electrical machines is nowadays of high interest in order to improve their efficiency. In railway applications, electrical motors can be shrouded in order to avoid particles to be deposited inside. To ensure a satisfactory cooling, pipes are placed inside the rotor and are thus rotating. Improvements in convective heat transfer inside the rotating pipes were numerically investigated. Model was first validated against experimental data and after that several geometry modifications were tested. Influence of the angle of attack of the fluid at the inlet to the pipe was discussed and it was shown that heat transfer can be significantly increased near the pipe inlet. In addition to that changing a circular pipe with an elliptical pipe was investigated in two ways: fixing the same hydraulic diameter or the same equivalent diameter. It was shown that the cooling efficiency can be significantly increased. The best overall heat transfer enhancement of about 45% exhibited elliptic pipes located orthogonal to the rotation radius and having the same cross-section as the reference circular pipes. Results can be used by designers of electrical machines in order to choose the best cooling strategy. Copyright © 2014 by ASME.

Agency: European Commission | Branch: FP7 | Program: CP | Phase: FoF-ICT-2011.7.4 | Award Amount: 4.50M | Year: 2011

Product and production engineering in companies are typically fragmented across different functional units, distributed across companies along the value chain, requiring input from experts from a variety of disciplines using different methods and tools. This leads to a high coordination effort to synergise work and information transfer as well as to sub-optimal decisions and unused knowledge and experiences. The resulting waste in engineering processes results in an unnecessary lengthening of time-to-market and time-to-production of new products and to a loss of competitiveness of European companies.\namePLM will offer a radically new and extensible approach to collaborative engineering, leveraging state-of-the art research on semantics, heuristics and visualization. The objectives are to\n-Engineer an ontology that serves as an\n-interoperable model and\n-integrating element for an open engineering system: the amePLM Platform\n-Develop an open engineering platform based on existing tools and libraries, by special consideration of open-source software\n-Research and develop tools to assist in product and process development, analysis, virtual testing and optimization based on heuristic methods and simulation that operate on knowledge represented by information which is structured by means of an ontology\n-Devise a visualization module to enable cross-disciplinary collaboration and remote consultation approaches\nThe solution development will be accomplished through a user-centric approach by 2 leading edge high tech software providers, guided and validated by industrial cases from 3 SME and 2 international companies. The research needed for the innovative amePLM-solutions is performed by 5 leading universities and Fraunhofer.\nThe knowledge-driven amePLM-platform will drastically accelerate product and production engineering by integrated workflows, capturing and reuse of knowledge and experiences and by facilitating cross-disciplinary knowledge-sharing and collaboration.

Shevchuk I.V.,MBtech Group
Journal of Heat Transfer | Year: 2011

The convective diffusion of feeding culture and the effect of fluid shear stress on endothelial cells are frequently investigated in cone-and-plate devices. Laminar fluid flow and heat and mass transfer in a cone-and-plate device, with cone apex touching the plate/disk, were simulated. The disk-to-cone gap made 1-5 deg. Transport equations were reduced to a system of self-similar ordinary differential equations solved numerically. Cases studied were a rotating cone and a stationary plate, and vice versa. The cone was isothermal, while the disk temperature followed a power-law radial distribution; boundary concentrations were constant. Prandtl and Schmidt numbers varied from 0.1 to 800. Temperature/diffusion profiles in the gap and Nusselt and Sherwood numbers exhibit different regimes of heat/mass transfer, depending on the disk surface temperature distribution. © 2011 American Society of Mechanical Engineers.

Shevchuk I.V.,MBtech Group
Modelling of Convective Heat and Mass Transfer in Rotating Flows | Year: 2015

This monograph presents results of the analytical and numerical modeling of convective heat and mass transfer in different rotating flows caused by (i) system rotation, (ii) swirl flows due to swirl generators, and (iii) surface curvature in turns and bends. Volume forces (i.e. centrifugal and Coriolis forces), which influence the flow pattern, emerge in all of these rotating flows. The main part of this work deals with rotating flows caused by system rotation, which includes several rotating-disk configurations and straight pipes rotating about a parallel axis. Swirl flows are studied in some of the configurations mentioned above. Curvilinear flows are investigated in different geometries of two-pass ribbed and smooth channels with 180° bends. The author demonstrates that the complex phenomena of fluid flow and convective heat transfer in rotating flows can be successfully simulated using not only the universal CFD methodology, but in certain cases by means of the integral methods, self-similar and analytical solutions. The book will be a valuable read for research experts and practitioners in the field of heat and mass transfer. © 2016 Springer International Publishing Switzerland. All rights are reserved.

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