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Article
Open AccessInfluence of wetting conditions on bubble formation from a submerged orifice
The formation of gas bubbles by submerged orifices is a fundamental process encountered in various industrial applications. The dynamics of the contact line and the contact angle may have a significant influen...
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Article
Open AccessHydrodynamic interaction of bubbles rising side-by-side in viscous liquids
Detailed experiments are conducted to study hydrodynamic effects of two simultaneously released bubbles rising in viscous liquids. Different types of interactions are observed as a function of the liquid visco...
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Article
Open AccessOscillation dynamics of a bubble rising in viscous liquid
In the present work, we study the oscillation dynamics of 3 mm-diameter bubbles generated through an orifice submerged in viscous liquids. The viscosity of those liquids is varied to change the behavior of the...
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Article
Open AccessExperimental investigation of non-Newtonian droplet collisions: the role of extensional viscosity
We investigate the collision behaviour of a shear thinning non-Newtonian fluid xanthan, by binary droplet collision experiments. Droplet collisions of non-Newtonian fluids are more complex than their Newtonian...
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Article
Open AccessThe dynamics of milk droplet–droplet collisions
Spray drying is an important industrial process to produce powdered milk, in which concentrated milk is atomized into small droplets and dried with hot gas. The characteristics of the produced milk powder are ...
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Article
Open AccessImproved quaternion-based integration scheme for rigid body motion
Rotation quaternions are frequently used for describing the orientation of non-spherical rigid bodies. Their compact representation by four numbers and disappearance of numerical problems, such as gimbal lock,...
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Article
Open AccessOn image pre-processing for PIV of single- and two-phase flows over reflecting objects
A novel image pre-processing scheme for PIV of single- and two-phase flows over reflecting objects which does not require the use of additional hardware is discussed. The approach for single-phase flow consist...
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Article
Open AccessEnergy absorption during compression and impact of dry elastic-plastic spherical granules
The discrete modelling and understanding of the particle dynamics in fluidized bed apparatuses, mixers, mills and others are based on the knowledge about the physical properties of particles and their mechanic...
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Article
Open AccessTwo- and Four-Way Coupled Euler–Lagrangian Large-Eddy Simulation of Turbulent Particle-Laden Channel Flow
Large-eddy simulations (LES) of a vertical turbulent channel flow laden with a very large number of solid particles are performed. The motivation for this research is to get insight into fundamental aspects of...
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Article
Open AccessAutothermal Reforming of Methane with Integrated CO2 Capture in a Novel Fluidized Bed Membrane Reactor. Part 1: Experimental Demonstration
Two fluidized bed membrane reactor concepts for hydrogen production via autothermal reforming of methane with integrated CO2 capture are proposed. Ultra-pure hydrogen is obtained via hydrogen perm-selective Pd-ba...
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Article
Open AccessAutothermal Reforming of Methane with Integrated CO2 Capture in a Novel Fluidized Bed Membrane Reactor. Part 2 Comparison of Reactor Configurations
The reactor performance of two novel fluidized bed membrane reactor configurations for hydrogen production with integrated CO2 capture by autothermal reforming of methane (experimentally investigated in Part 1) h...
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Chapter
Multi-Level Modelling of Dispersed Gas-Liquid Two-Phase Flows
Dispersedgas-liquid two-phase flows are encountered in a variety of industrial processes such as the large-scale production of synthetic fuels and base chemicals employing bubble column reactors. Despite their...
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Chapter and Conference Paper
Large-Eddy Simulation of a Particle-Laden Turbulent Channel Flow
Large-eddy simulations of a vertical turbulent channel flow with 420,000 solid particles are performed in order to get insight into fundamental aspects of a riser flow. The question is addressed whether collis...
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Chapter and Conference Paper
Computational fluid dynamics applied to chemical reaction engineering
In this paper a brief review will be presented on the application of Computational Fluid Dynamics (CFD) to the field of Chemical Reaction Engineering (CRE) with emphasis on multiphase flow due to its practical...
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Chapter
The Rotating Cone Flash Pyrolysis Reactor
The velocity of nearly spherical mono-sized PVC powder in a cold-flow rotating cone reactor (top angle π/3 rad, height 0.43 m) was measured under variation of the particle diameter (140 –780 μm) and the cone r...
