Conference

Session Identifier: WS1 - WORKSHOP
Title: "Workshop on DEM-CFD"
WS Leader: Prof. Viktor Scherer, Ruhr-Universität Bochum, Bochum, Germany
WS Co-organizer: Prof. Dominique Thévenin, Otto von Guericke Universität, Magdeburg, Germany

The combination of Computational Fluid Dynamics (CFD) with the Discrete Element Method (DEM) provides novel opportunities for more accurate simulations of particulate flows involving large particles. This is particularly true in process and energy engineering. However, many challenges remain from the methodological point of view as well as regarding requirements in terms of computing time and memory. Specific extensions are necessary for flows involving chemical reactions, phase changes, non-newtonian properties, or compressibility effects, to cite a few. This workshop will document recent advances and showcase challenging applications of DEM-CFD.

Number of presentations: 5

#117
Josef Tausendschön, Mohammadsadegh Salehi and Stefan Radl
Machine learning-based closure development for modeling of cohesive gas-particle flows

#122
Christoph Spijker and Harald Raupenstrauch
CFD-DEM modelling of shaft furnaces, using the volume fraction smoother approach

#118
Enric Illana Mahiques, Max Brömmer, Siegmar Wirtz and Viktor Scherer
Local flow resolution with the blocked-off method in DEM-CFD: Gaseous fuel jet dispersion and combustion in a particle assembly

#116
Berend van Wachem, Victor Chéron and Fabien Evrard
Discrete element modelling of non-spherical particles in turbulent gas-solid flows

#130
Babak Aghel, Falah Alobaid, Christoph Graf and Bernd Epple
Recent advances in CFD-DEM simulation of fluidized beds

Session Identifier: WS2 - WORKSHOP
Title: "Workshop on biomedical flows"
WS Leader: Prof. Gábor Janiga, Otto von Guericke Universität, Magdeburg, Germany
WS Co-organizers: Prof. György Paál, Budapest University of Technology and Economics, Budapest, Hungary
Prof. Marie Oshima, The University of Tokyo, Tokyo, Japan

Numerical simulations are widely used to investigate biomedical problems including mainly but not exclusively blood flows. The quality of the obtained results strongly depends on the boundary conditions, as well as on the applied models. Therefore, their role should be carefully studied and the role of generic versus patient-specific conditions clarified. The present workshop aims at discussing such aspects and assessing the potential of numerical blood flow simulations for different problems, including intracranial aneurysms (IA) or arteriovenous malformations (AVM).

Number of presentations: 7

#66
Márton Bence Németh, Benjamin Csippa, Zsuzsanna Mihály, Gyögy Paál and Péter Sótonyi
Boundary condition options for Carotid bifurcation analysis using Doppler velocity measurements

#72
Péter Friedrich, Benjamin Csippa, György Paál and István Szikora
Initiation of bifurcation aneurysms: a pilot study

#45
Jana Korte, Mariya Pravdivtseva, Laurel Marsh, Franziska Gaidzik, Naomi Larsen, Gabor Janiga and Philipp Berg
Can black blood MRI predict hemodynamics in intracranial aneurysms? - An analysis of in-vitro signal intensity and CFD

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Tamás István Józsa and Stephen John Payne
Cerebral perfusion simulation of a virtual patient cohort based on clinical data integration

#55
Dániel Gyürki, István Szikora and György Paál
Calculating particle residence times in vessel geometries with aneurysm

#119
Janneck Stahl, Sylvia Saalfeld, Laura Stone McGuire, Denise Brunozzi, Ali Alaraj, David Hasan and Philipp Berg
Multimodal hemodynamic evaluation of vessel wall enhanced cerebral draining veins for the assessment of arteriovenous malformations

#58
Richárd Wéber, Dániel Gyürki and György Paál
One-dimensional modelling of the artery network using the method of characteristics with a lumped heart

Session Identifier: WS3 - WORKSHOP
Title: "Challenges in valve modelling & analysis"
WS Leader: Prof. Csaba Hős, Budapest University of Technology and Economics, Budapest, Hungary

Valves are essential elements of every hydraulic system, yet their dynamic behavior is often overlooked, especially in the case of mass applications, such as e.g. the hundreds or thousands of safety valves in a chemical plant or oil refinery. Computational Fluid Dynamics (CFD) modeling provides novel opportunities for more accurate simulations, yet dynamic simulations, especially with non-ideal gas behavior or multiphase flow still require inefficient amount of computational effort. Thus, reduced order modeling is viable, especially when valve-pipeline interaction is addressed. The workshop aims at sharing recent findings of research groups in this field.

Number of presentations: 4

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Csaba Hős
Challenges in valve modelling & analysis: State of the art

#105
Gergely Keszthelyi, Jürgen Schmidt and Jens Denecke
Effects of valve characteristic and fluid force on valve stability

#109
Goran Pavic and Fabien Chevillotte
Dynamic pressure propagation in pipes: modelling and analysis by measurement

#114
Csaba Hos and Ghaith Burhani
On the effect of mass fraction of frozen mixture flow on the dynamic performance of a direct spring operated safety valve

Session Identifier: WS4 - WORKSHOP
Title: "Industry 4.0 in smart ventilation: questions and challenges"
WS Leader: Prof. János Vad, Budapest University of Technology and Economics, Budapest, Hungary
WS Co-organizer: Prof. Alessandro Corsini, Sapienza Università di Roma, Rome, Italy

The recent view represented by Industry 4.0 enables substantially new features in industrial air technology as well as in industrial heating, ventilation, and air conditioning. Such new features expand the capabilities of traditional air technical systems – even if such traditional systems are highly controlled systems. Some examples for smart fans, and for smart ventilation systems incorporating them, meeting the Industry 4.0 concept, are as follows: multifunctional monitoring, control and rationalization of aerodynamics performance and power consumption; prediction of aerodynamics degradation due to blade erosion or contamination; vibration self-diagnostics for forecasting bearing fatigue and rotor imbalance due to blade wear or deposit, serving as an aid to demand-based fan maintenance.

Session Identifier: WS5 - WORKSHOP
Title: "Coupling techniques in multiscale atmospheric models: Microphysics, local scale simulations, PBL structure"
WS Leader: Dr. Tamás Weidinger, Eötvös Loránd University, Budapest, Hungary

The recent view represented by coupling techniques in multiscale atmospheric models in field of meteorology-climatology and fluid dynamics. Scale-dependent atmospheric processes - the range of phenomena directly described and parameterized by numerical models - evolve with the available spatial and temporal resolution. Different climate, weather, and fluid dynamics models use several common methods and solutions. These include constructing initial and boundary conditions and assimilating the results to measurements or larger-scale model results, i.e., the issue of model initialization. There is a common interest in parameterization sub-grid-scale processes, be it in the description of convection, cloud formation, precipitation, or scale-dependent turbulent exchange processes. Parameterization of turbulence — modeling of the viscous sublayer, the constant-flux near-surface layer, and the planetary boundary layer — also connects modelers in engineering and meteorology/climatology. Model couplings and model embedding raise the question of one-way and two-way interactions between scales. Another critical issue is the modeling of scale-dependent pollutant dispersion and the description of urban effects.

Number of presentations: 4

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István Geresdi
Can we have a better simulation of fog or haze formation in urban environment?

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Márton Koren and Gergely Kristóf
Wind-shear coupling method to implicate large turbulent structures in a building-scale large eddy simulation

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Miklós Balogh, Árpád Farkas, Tamás Weidinger and Imre Salma
Dispersion simulation of firework-related aerosols

#123
Árpád Bordás, András Zénó Gyöngyösi and Tamás Weidinger
Examination of Saharan boundary layer by a single-column and 3D WRF model - a case study for Fennec campaign

Session Identifier: WS6 - WORKSHOP
Title: "Coupling techniques in multiscale atmospheric models: Numerical weather and climate modelling: scaling, coupling, parameterizations"
WS Leader: Dr. Gergely Kristóf, Budapest University of Technology and Economics, Budapest, Hungary

The recent view represented by coupling techniques in multiscale atmospheric models in field of meteorology-climatology and fluid dynamics. Scale-dependent atmospheric processes - the range of phenomena directly described and parameterized by numerical models - evolve with the available spatial and temporal resolution. Different climate, weather, and fluid dynamics models use several common methods and solutions. These include constructing initial and boundary conditions and assimilating the results to measurements or larger-scale model results, i.e., the issue of model initialization. There is a common interest in parameterization sub-grid-scale processes, be it in the description of convection, cloud formation, precipitation, or scale-dependent turbulent exchange processes. Parameterization of turbulence — modeling of the viscous sublayer, the constant-flux near-surface layer, and the planetary boundary layer — also connects modelers in engineering and meteorology/climatology. Model couplings and model embedding raise the question of one-way and two-way interactions between scales. Another critical issue is the modeling of scale-dependent pollutant dispersion and the description of urban effects.

Number of presentations: 3

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Timea Kalmár, Ildikó Pieczka and Rita Pongrác
Testing convective parameterzation schemes in RegCM over the Carpathian region

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Gabriella Allaga-Zsebeházi
Challenge in providing detailed information on future climate change in cities

#124
Balázs Szintai and Kristóf Szanyi
High resolution experiments with the AROME numerical weather prediction model over Hungary