Simon Schneiderbauer
YOU?
Author Swipe
View article: Enstrophy transport rates determine the Kolmogorov-Hinze scale in turbulent fragmentation of droplets
Enstrophy transport rates determine the Kolmogorov-Hinze scale in turbulent fragmentation of droplets Open
This study investigates the physical connection between turbulence statistics and the fragmentation cascade of droplets in incompressible nondecaying homogeneous isotropic turbulence. Using interface-resolved direct numerical simulation an…
View article: Continuum modeling of gas–particle flows: an overview
Continuum modeling of gas–particle flows: an overview Open
In this review paper, we provide a brief overview of the recent advances in the continuum modeling of gas–particle flows. First, we focus on the kinetic theory-based two-fluid models, which have become a valuable tool to investigate small-…
View article: Discrete magnification lens model: A new hybrid multi-scale modelling method for fluid-particle systems
Discrete magnification lens model: A new hybrid multi-scale modelling method for fluid-particle systems Open
We present a novel hybrid multi-scale model, referred to as "discrete magnification lens" method, which utilizes a computational fluid dynamics coupled to discrete element method (CFD-DEM) approach within a specific region of interest in a…
View article: Machine Learning Approaches to Close the Filtered Two-Fluid Model for Gas–Solid Flows: Models for Subgrid Drag Force and Solid Phase Stress
Machine Learning Approaches to Close the Filtered Two-Fluid Model for Gas–Solid Flows: Models for Subgrid Drag Force and Solid Phase Stress Open
Gas-particle flows are commonly simulated through a two-fluid model at the industrial scale. However, these simulations need a very fine grid to have accurate flow predictions, which is prohibitively demanding in terms of computational res…
View article: Machine learning approaches to close the filtered two-fluid model for gas-solid flows: Models for subgrid drag force and solid phase stress
Machine learning approaches to close the filtered two-fluid model for gas-solid flows: Models for subgrid drag force and solid phase stress Open
Gas-particle flows are commonly simulated through two-fluid model at industrial-scale. However, these simulations need very fine grid to have accurate flow predictions, which is prohibitively demanding in terms of computational resources. …
View article: Dust cloud evolution and flame propagation of organic dust deflagration under low wall influence
Dust cloud evolution and flame propagation of organic dust deflagration under low wall influence Open
The present study discusses experiments on organic dust explosions in a setup with low wall influence. The proposed apparatus decouples the dust dispersion and the deflagration event in two separate compartments. The use of a continuous-wa…
View article: A comprehensive comparison of Two-Fluid Model, Discrete Element Method and experiments for the simulation of single- and multiple-spout fluidized beds
A comprehensive comparison of Two-Fluid Model, Discrete Element Method and experiments for the simulation of single- and multiple-spout fluidized beds Open
We employ a two-fluid model (TFM) as well as a computational fluid dynamics coupled to discrete element method (CFD-DEM) approach to study the time averaged hydrodynamics of single- and multiple-spout fluidized beds. Simulations are valida…
View article: A fast modeling of chemical reactions in industrial‐scale olefin polymerization fluidized beds using recurrence <scp>CFD</scp>
A fast modeling of chemical reactions in industrial‐scale olefin polymerization fluidized beds using recurrence <span>CFD</span> Open
We present a novel approach for the fast modeling of exothermic chemical reactions in industrial‐scale fluidized bed reactors. It implicates a fast olefin polymerization process, accounting for the catalyst activity, the solubility of the …
View article: Computational Fluid Dynamics Simulation of Iron Ore Reduction in Industrial‐Scale Fluidized Beds
Computational Fluid Dynamics Simulation of Iron Ore Reduction in Industrial‐Scale Fluidized Beds Open
Detailed simulations of industrial‐scale fluidized beds such as the FINEX process are still unfeasible due to the wide range of spatial scales. Due to the computational limitations it is common to apply coarse grids, which do not resolve a…
View article: Verification and Validation of Spatially Averaged Models for Fluidized Gas‐Particle Suspensions
Verification and Validation of Spatially Averaged Models for Fluidized Gas‐Particle Suspensions Open
Two different methods for closure modeling of the unresolved terms appearing in the filtered two‐fluid model are discussed and compared. The spatially averaged two‐fluid model is based on generalizing the concepts of large eddy simulation …
View article: On the fast modeling of species transport in fluidized beds using recurrence computational fluid dynamics
On the fast modeling of species transport in fluidized beds using recurrence computational fluid dynamics Open
Due to variety of scale dynamics evolved in gas–solid flows, most of its numerical description is limited to expensive short durations. This has made the slow processes therein, such as the chemical species conversion, to be out of an appr…
View article: Validation study on spatially averaged two‐fluid model for gas‐solid flows: II. Application to risers and fluidized beds
Validation study on spatially averaged two‐fluid model for gas‐solid flows: II. Application to risers and fluidized beds Open
In our prior study (Schneiderbauer, AIChE J. 2017;63(8):3544–3562), a spatially averaged two‐fluid model (SA‐TFM) was presented, where closure models for the unresolved terms were derived. These closures require constitutive relations for …
View article: Validation study on spatially averaged two‐fluid model for gas–solid flows: I. <i>A priori</i> analysis of wall bounded flows
Validation study on spatially averaged two‐fluid model for gas–solid flows: I. <i>A priori</i> analysis of wall bounded flows Open
In our prior study (Schneiderbauer, AIChE J, 2017;63(8):3544–3562), we presented a spatially averaged two‐fluid model, where closure models for the unresolved terms were derived. These closures require constitutive relations for the turbul…
View article: Experimental investigation of liquid-liquid system drop size distribution in Taylor-Couette flow and its application in the CFD simulation
Experimental investigation of liquid-liquid system drop size distribution in Taylor-Couette flow and its application in the CFD simulation Open
\nLiquid-liquid systems are widely used in the several industries such as food, pharmaceutical, cosmetic, chemical and petroleum. Drop size distribution (DSD) plays a key role as it strongly affects the overall mass and heat transfer in th…
View article: A Lagrangian‐Eulerian hybrid model for the simulation of direct reduction of iron ore in fluidized beds
A Lagrangian‐Eulerian hybrid model for the simulation of direct reduction of iron ore in fluidized beds Open
Fluidized bed and moving bed reactors are one of the most important technologies in several branches of process industry. Especially, it is known since decades that iron can be reduced rapidly and efficiently from iron carrier materials us…
View article: CFD simulation of the droplet size distribution of liquid‐liquid emulsions in stirred tank reactors
CFD simulation of the droplet size distribution of liquid‐liquid emulsions in stirred tank reactors Open
Predicting the drop size distribution (DSD) is essential in particulate flows such as emulsions as it affects mass transfer and heat transfer. In the current work we developed a novel numerical method to account for droplet breakup. The dr…
View article: Modelling of chemical reactions in metallurgical processes
Modelling of chemical reactions in metallurgical processes Open
Iron-ore reduction has attracted much interest in the last three decades since it can be considered as a core process in steel industry. The iron-ore is reduced to iron with the use of blast furnace and fluidized bed technologies. To inves…
View article: CFD Study of the Gas-particle Flow in a Horizontal Duct: The Impact of the Solids Wall Boundary Conditions
CFD Study of the Gas-particle Flow in a Horizontal Duct: The Impact of the Solids Wall Boundary Conditions Open
The Johnson-Jackson boundary conditions are included in the twoPhaseEulerFoam solver of OpenFOAM-2.2.x in order to consider the wall-friction effect on the movement of particles. A straight conveying line using Johnson-Jackson boundary con…
View article: Inhomogeneous Segregation of Binary Mixtures in Fluidized Beds
Inhomogeneous Segregation of Binary Mixtures in Fluidized Beds Open
This paper deals with segregation effects in of binary mixtures in a 2D fluidized bed. In the experiment initial inhomogeneities in the particle mixture lead to uneven bed pressure drop. This results in inhomogeneous particle segregation a…
View article: Numerical Study of a Bi-disperse Gas-solid Fluidized Bed Using an Eulerian and Lagrangian Hybrid Model
Numerical Study of a Bi-disperse Gas-solid Fluidized Bed Using an Eulerian and Lagrangian Hybrid Model Open
In this paper, we present a hybrid model for the numerical assessment of poly-disperse gas-solid fluidized beds. The main idea of such a modeling strategy is to use a combination of a Lagrangian discrete phase model (DPM) and a kinetic the…