Moving measurements: Measurements of the turbulent/non-turbulent interface of a round jet in a co-moving frame of reference

At the turbulent/non-turbulent interface (TNTI) of a jet flow, momentum is transferred from the turbulent jet fluid to the fluid at rest. This transfer is governed by two mechanisms. One of them is related to the large scales of the flow and the other relates to the small scales of the flow. Which of the two is dominant is still a point of...

Entrainment Coefficient of a Turbulent Plume: An Experimental Investigation with PIV and LIF

Buoyancy-driven plumes are natural phenomena that occur in widespread applications, such as geological flows or pollutant dispersion from a chimney. One characteristic of plumes is the entrainment process, where the plume stream drags in ambient fluid and mixes with the ambient fluid, and classic plume theory has used an entrainment coefficient...

Using the Quasi-chemical formalism beyond the phase Diagram: Density and viscosity models for molten salt fuel systems

CALPHAD models to compute the density and viscosity of four keystone systems related to Molten Salt Reactor (MSR) technology have been optimized: NaCl-UCl₃, LiF-ThF₄, LiF-UF₄, and LiF-ThF₄-UF₄. Revised thermodynamic assessments of all four systems, using the modified quasichemical...

Design and implementation of a Low Power Mixer-first Receiver for IEEE 802.11ah standard

IoT refers to a network of connected devices that exchange data for different applications using different wireless standards such as Cellular, ZigBee, Bluetooth, Mesh Networks, and the widely used WiFi. For IoT applications that do not require high data rates but require long-range data transmission and low power operation, a sub 1GHz WiFi...

Scalar mixing in a turbulent boundary layer

We present results on the analysis of measurements on the dispersion of a contaminant in a turbulent boundary layer. The contaminant is a fluorescent dye (Rh.-B) that was introduced in a turbulent boundary layer (푅푅푒푒# = 3050) in a water channel. The velocity field was measured by means of tomographic PIV. Simultaneously, the concentration field...

ElectroHydroDynamic Atomisation: Unipolar and bipolar characterisation and modelling

ElectroHydroDynamic Atomisation (or electrospraying) is a way to disperse a liquid into droplets by exposing it to a strong electric field. The resulting droplets are (highly) charged and can exhibit narrow size and charge distributions which is desirable for many applications. In this dissertation a novel method is developed to classify the...

Tar formation in a steam-O2 blown CFB gasifier and a steam blown PBFB gasifier (BabyHPR): Comparison between different on-line measurement techniques and the off-line SPA sampling and analysis method

Two on-line tar measurement campaigns were carried out using an atmospheric pressure 100 “”kWth steam-O2 blown circulating fluidized bed (CFB) gasifier at the Delft University of Technology (TUD) and a 30–40kWth steam blown pressurized bubbling fluidized bed (PBFB) gasifier BabyHPR (Heatpipe Reformer) at the Technical University Munich (TUM)....

Two phase flow and phase change heat transfer in small structures

New production techniques, which became available since the 1980’s, allowed the mass production of small sized fluidic systems. Reducing the size of a technical system alters the performance due to scaling effects. Physical phenomena which operate on volumes, such as gravity and inertia, become less important with respect to physical phenomena...

Design of a life-cycle chain from biomass acquisition and transport to the production sythesis gas for Shell Middle Distillate Products through lagre-scale gasification of biomass in the Rotterdam Harbour area

Document(en) uit de collectie Chemische Procestechnologie

Measurement of turbulent scalar mixing by means of a combination of PIV and LIF