PUMA publications for /tag/Flowhttps://puma.ub.uni-stuttgart.de/tag/FlowPUMA RSS feed for /tag/Flow2024-03-29T11:28:11+01:00System Dynamic Models and Real-time Simulation of Complex Material
Flow Systemshttps://puma.ub.uni-stuttgart.de/bibtex/23cb83562fd4a436e376d28712fe58a37/mhartmannmhartmann2018-07-20T10:54:15+02:00Material Real-time System dynamic flow models simulation; system; vorlaeufig <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="S. Hoher" itemprop="url" href="/person/1f49a945ea15206c6cd60d4db77a8d5a5/author/0"><span itemprop="name">S. Hoher</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="P. Schindler" itemprop="url" href="/person/1f49a945ea15206c6cd60d4db77a8d5a5/author/1"><span itemprop="name">P. Schindler</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="S. G?ttlich" itemprop="url" href="/person/1f49a945ea15206c6cd60d4db77a8d5a5/author/2"><span itemprop="name">S. G?ttlich</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="V. Schleper" itemprop="url" href="/person/1f49a945ea15206c6cd60d4db77a8d5a5/author/3"><span itemprop="name">V. Schleper</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="S. Röck" itemprop="url" href="/person/1f49a945ea15206c6cd60d4db77a8d5a5/author/4"><span itemprop="name">S. Röck</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/Book" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="name">Enabling Manufacturing Competitiveness and Economic Sustainability</span>, </em><em><span itemprop="publisher">Springer Berlin Heidelberg</span>, </em></span>(<em><span>2012<meta content="2012" itemprop="datePublished"/></span></em>)</span>Fri Jul 20 10:54:15 CEST 2018Enabling Manufacturing Competitiveness and Economic Sustainability316-321System Dynamic Models and Real-time Simulation of Complex Material
Flow Systems2012Material Real-time System dynamic flow models simulation; system; vorlaeufig Stochastic Modeling for Heterogeneous Two-Phase Flowhttps://puma.ub.uni-stuttgart.de/bibtex/23886d742461971b380dfbfdfbab7f0bc/mhartmannmhartmann2018-07-20T10:54:15+02:00Flow Galerkin Hybrid finite in media; method porous stochastic volume vorlaeufig <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="M. Köppel" itemprop="url" href="/person/19edc4b7e189ef751cf0e8c97b22240ef/author/0"><span itemprop="name">M. Köppel</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="I. Kröker" itemprop="url" href="/person/19edc4b7e189ef751cf0e8c97b22240ef/author/1"><span itemprop="name">I. Kröker</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="C. Rohde" itemprop="url" href="/person/19edc4b7e189ef751cf0e8c97b22240ef/author/2"><span itemprop="name">C. Rohde</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/Book" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="name">Finite Volumes for Complex Applications VII-Methods and Theoretical
Aspects</span>, </em><em>volume 77 of Springer Proceedings in Mathematics & Statistics, </em><em><span itemprop="publisher">Springer International Publishing</span>, </em></span>(<em><span>2014<meta content="2014" itemprop="datePublished"/></span></em>)</span>Fri Jul 20 10:54:15 CEST 2018Finite Volumes for Complex Applications VII-Methods and Theoretical
Aspects353-361Springer Proceedings in Mathematics \& StatisticsStochastic Modeling for Heterogeneous Two-Phase Flow772014Flow Galerkin Hybrid finite in media; method porous stochastic volume vorlaeufig Numerical modelling of a peripheral arterial stenosis using dimensionally
reduced models and kernel methodshttps://puma.ub.uni-stuttgart.de/bibtex/2832dacbae634d8ae21c67ac44f94850c/mhartmannmhartmann2018-07-20T10:54:15+02:00blood dimensionally flow kernel methods, mixed-dimension models, peripheral real-time reduced simulations simulations, stenosis, surrogate vorlaeufig <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Tobias Köppl" itemprop="url" href="/person/1979f2097ba9c22d67096e59e5c6d7a3e/author/0"><span itemprop="name">T. Köppl</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Gabriele Santin" itemprop="url" href="/person/1979f2097ba9c22d67096e59e5c6d7a3e/author/1"><span itemprop="name">G. Santin</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Bernard Haasdonk" itemprop="url" href="/person/1979f2097ba9c22d67096e59e5c6d7a3e/author/2"><span itemprop="name">B. Haasdonk</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Rainer Helmig" itemprop="url" href="/person/1979f2097ba9c22d67096e59e5c6d7a3e/author/3"><span itemprop="name">R. Helmig</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">International Journal for Numerical Methods in Biomedical Engineering</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">0 </span></span>(<span itemprop="issueNumber">ja</span>):
<span itemprop="pagination">e3095</span></em> </span>(<em><span>2018<meta content="2018" itemprop="datePublished"/></span></em>)<em>e3095 cnm.3095.</em></span>Fri Jul 20 10:54:15 CEST 2018International Journal for Numerical Methods in Biomedical Engineeringe3095 cnm.3095jae3095Numerical modelling of a peripheral arterial stenosis using dimensionally
reduced models and kernel methods02018blood dimensionally flow kernel methods, mixed-dimension models, peripheral real-time reduced simulations simulations, stenosis, surrogate vorlaeufig Summary In this work, we consider two kinds of model reduction techniquesto
simulate blood flow through the largest systemic arteries, where
a stenosis is located in a peripheral artery i.e. in an artery that
is located far away from the heart. For our simulations we place
the stenosis in one of the tibial arteries belonging to the right
lower leg (right post tibial artery). The model reduction techniques
that are used are on the one hand dimensionally reduced models (1-Dand
0-D models, the so-called mixed-dimension model) and on the other
hand surrogate models produced by kernel methods. Both methods are
combined in such a way that the mixed-dimension models yield training
data for the surrogate model, where the surrogate model is parametrisedby
the degree of narrowing of the peripheral stenosis. By means of a
well-trained surrogate model, we show that simulation data can be
reproduced with a satisfactory accuracy and that parameter optimisation
or state estimation problems can be solved in a very efficient way.
Furthermore it is demonstrated that a surrogate model enables us
to present after a very short simulation time the impact of a varying
degree of stenosis on blood flow, obtaining a speedup of several
orders over the full model.On the singular limit of a two-phase flow equation with heterogeneities
and dynamic capillary pressurehttps://puma.ub.uni-stuttgart.de/bibtex/242d1b78569ecd89f80f0f48af825ce75/mhartmannmhartmann2018-07-20T10:54:15+02:00Conservation capillarity, discontinuous dynamic flow flux function, in law, limit, media. porous singular two-phase vorlaeufig <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="F. Kissling" itemprop="url" href="/person/1dfd390454fe4506ee81abb066cb2a4d4/author/0"><span itemprop="name">F. Kissling</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="K.H. Karlsen" itemprop="url" href="/person/1dfd390454fe4506ee81abb066cb2a4d4/author/1"><span itemprop="name">K. Karlsen</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift
für Angewandte Mathematik und Mechanik</span>, </em> </span>(<em><span>2013<meta content="2013" itemprop="datePublished"/></span></em>)</span>Fri Jul 20 10:54:15 CEST 2018ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift
f{\"u}r Angewandte Mathematik und Mechanikn/a--n/aOn the singular limit of a two-phase flow equation with heterogeneities
and dynamic capillary pressure2013Conservation capillarity, discontinuous dynamic flow flux function, in law, limit, media. porous singular two-phase vorlaeufig We consider conservation laws with spatially discontinuous flux that
are perturbed by diffusion and dispersion terms. These equations
arise in a theory of two-phase flow in porous media that includes
rate-dependent (dynamic) capillary pressure and spatial heterogeneities.
We investigate the singular limit as the diffusion and dispersion
parameters tend to zero, showing strong convergence towards a weak
solution of the limit conservation law.Four Methods for LIDAR Retrieval of Microscale Wind Fieldshttps://puma.ub.uni-stuttgart.de/bibtex/2486fb4db2367bfff1b31e3a9ff67edde/mwiggermwigger2018-07-01T13:42:06+02:00and fields flow methods;vector models;fluid;LiDAR;retrievals;spatio-temporal semblance wind <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Allen Q. Howard" itemprop="url" href="/person/16256b10c5c2b0538cbf72e984eb030ba/author/0"><span itemprop="name">A. Howard</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Thomas Naini" itemprop="url" href="/person/16256b10c5c2b0538cbf72e984eb030ba/author/1"><span itemprop="name">T. Naini</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Remote Sensing</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">4 </span></span>(<span itemprop="issueNumber">12</span>):
<span itemprop="pagination">2329--2355</span></em> </span>(<em><span>2012<meta content="2012" itemprop="datePublished"/></span></em>)</span>Sun Jul 01 13:42:06 CEST 2018Remote Sensing122329--2355Four Methods for LIDAR Retrieval of Microscale Wind Fields42012and fields flow methods;vector models;fluid;LiDAR;retrievals;spatio-temporal semblance wind This paper evaluates four wind retrieval methods for micro-scale meteorology applications with volume and time resolution in the order of 30m3 and 5 s. Wind field vectors are estimated using sequential time-lapse volume images of aerosol density fluctuatFlow Rate Estimation Using Unscented Kalman Filterin Automatic Pouring Robot: Flow Rate Estimation Using Unscented Kalman Filterin Automatic Pouring Robothttps://puma.ub.uni-stuttgart.de/bibtex/245dcbc76b748c8e4c635d02ecdc4d5fb/isw-bibliothekisw-bibliothek2016-03-03T09:53:12+01:00ISW Kalman automatic equipment estimation, filter, flow foundry pouring rate robot, unscented <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Kazuhiko Terashima Oliver Sawodny Yoshiyuki Noda, Markus Birkhold" itemprop="url" href="/person/11bdf6f5c937b919209a8de37c08f5e79/author/0"><span itemprop="name">K. Yoshiyuki Noda, Markus Birkhold</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Alexander Verl" itemprop="url" href="/person/11bdf6f5c937b919209a8de37c08f5e79/author/1"><span itemprop="name">A. Verl</span></a></span></span>. </span><span class="additional-entrytype-information">(<em><span>2011<meta content="2011" itemprop="datePublished"/></span></em>)</span>Thu Mar 03 09:53:12 CET 2016--Flow Rate Estimation Using Unscented Kalman Filterin Automatic Pouring Robot: Flow Rate Estimation Using Unscented Kalman Filterin Automatic Pouring Robot2011ISW Kalman automatic equipment estimation, filter, flow foundry pouring rate robot, unscented We describe here a method for estimating the pouring flow rate for tilting-ladle-type automatic pouring robotused in casting industries. To precisely pour molten metal into the mold, controlling the flow rate of liquid flowing outof the ladle is mandatory. However, it is difficult to directly measure the pouring flow rate by using a conventional flowmeter, because the flow meter is damaged by the high temperature molten metal. Therefore, in this study, we used a softsensing technique as part of the pouring flow rate estimation system. The extended Kalman filter was applied to the flowrate estimation of the automatic pouring robot in previous study. The previous approach can be applied only the ladlewith smooth shape, because of derivation of Jacobian matrix. However, some ladles with complicated shape which theJacobian matrix cannot be derived have been used in an actual casting plant. In this paper, an unscented Kalman filterwhich does not need the Jacobian matrix is applied into the flow rate estimation. The effectiveness of the proposed flowrate estimation method is demonstrated through simulations and experiments.A System Dynamic Model of a Complex Material Flow System for VirtualCommissioning: A System Dynamic Model of a Complex Material Flow System for VirtualCommissioninghttps://puma.ub.uni-stuttgart.de/bibtex/2b16802e7d67d2edeb58cb28c3960222e/isw-bibliothekisw-bibliothek2016-03-03T09:53:12+01:00ISW Material Physically Real-time based flow modelling, simulation, <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Röck S. Verl A. Hoher, S." itemprop="url" href="/person/16d46c9609526f0bb1368260fcf120d0a/author/0"><span itemprop="name">R. Hoher, S.</span></a></span></span>. </span><span class="additional-entrytype-information">(<em><span>2011<meta content="2011" itemprop="datePublished"/></span></em>)</span>Thu Mar 03 09:53:12 CET 2016--A System Dynamic Model of a Complex Material Flow System for VirtualCommissioning: A System Dynamic Model of a Complex Material Flow System for VirtualCommissioning2011ISW Material Physically Real-time based flow modelling, simulation, The high productivity of modern factories is achieved by flexible andreconfigurable manufacturing units with highly automated machining centers andconveying systems. In order to be able to develop the control systems of theproduction, methods for virtual commissioning are a scope for design.The poster introduces a real-time-capable multiscale material flow simulationand presents in particular the microscopic model scale for the virtualcommissioning. This discrete element model takes into account the physicalproperties of the material, as for example masses, inertia, friction andelasticity as well as the interaction among each other and the environment.For this purpose we present a concept consisting of a hierarchical collisiondetection, collision response, physically-based modeling and real-timesimulation. We explicitly examine the requirements on the virtualcommissioning, which are a strongly time-deterministic computation in therange of one millisecond and robust and efficient computing algorithms. Thesimulation concept is validated against a real conveying system and aperformance measurement is carried out.