Knud Erik Meyer
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View article: Vision-based tracking of orientation and velocity for non-spherical particles
Vision-based tracking of orientation and velocity for non-spherical particles Open
A stereo camera method for tracking the position and orientation of rigid non-spherical particles is presented. The method works by comparing the images of the observed particle with that of a geometric model of the observed particle. The …
View article: Do active learning techniques promote higher academic performance in an online graduate anatomy course?
Do active learning techniques promote higher academic performance in an online graduate anatomy course? Open
Human anatomy is a foundational course in graduate health professional programs. Given the increased enrollment in anatomy courses, along with the development of new technologies, institutions are increasingly compelled to provide alternat…
View article: An Reτ dependent spatial resolution correction scheme for hotwire measurements in developing zero-pressure-gradient turbulent boundary layers
An Reτ dependent spatial resolution correction scheme for hotwire measurements in developing zero-pressure-gradient turbulent boundary layers Open
Constant temperature anemometry remains the preferred method for the measurement of key quantities in turbulent boundary layer investigations. One main challenge is the finite length of the hotwire sensor often being larger than the smalle…
View article: Free-settling dynamics of irregular microplastic particles in water
Free-settling dynamics of irregular microplastic particles in water Open
View article: Measured Air Flow Leakage in Facemask Usage
Measured Air Flow Leakage in Facemask Usage Open
The importance of wearing a facemask during a pandemic has been widely discussed, and a number of studies have been undertaken to provide evidence of a reduced infectious virus dose because of wearing facemasks. Here, one aspect that has r…
View article: A spatial resolution correction scheme for disturbance profiles in developing zero-pressure-gradient turbulent boundary layers
A spatial resolution correction scheme for disturbance profiles in developing zero-pressure-gradient turbulent boundary layers Open
Constant temperature anemometry (CTA) is still the preferred method in measurement of key quantities in turbulence investigations. One of the main challenges of CTA is the finite length of the sensor often being larger than the smallest ed…
View article: High heat flux flow boiling of R1234yf, R1234ze(E) and R134a in high aspect ratio microchannels
High heat flux flow boiling of R1234yf, R1234ze(E) and R134a in high aspect ratio microchannels Open
Flow boiling of refrigerants in narrow channels has a great potential to cope with future challenges in the thermal management of high heat flux electronics. This study investigated the flow boiling heat transfer of R1234yf, R1234ze(E), an…
View article: Critical heat flux characteristics of R1234yf, R1234ze(E) and R134a during saturated flow boiling in narrow high aspect ratio microchannels
Critical heat flux characteristics of R1234yf, R1234ze(E) and R134a during saturated flow boiling in narrow high aspect ratio microchannels Open
This experimental study investigated narrow and high aspect ratio multi-microchannels that were micro-machined in copper with thin separating walls during saturated flow boiling of refrigerants. The hypothesis was that these channels could…
View article: Experimental Characterization of the Heat Transfer in Multi-Microchannel Heat Sinks for Two-Phase Cooling of Power Electronics
Experimental Characterization of the Heat Transfer in Multi-Microchannel Heat Sinks for Two-Phase Cooling of Power Electronics Open
This study aims to characterize experimentally the heat transfer in micro-milled multi-microchannels copper heat sinks operating with flow boiling, in the attempt to contribute to the development of novel and high heat flux thermal managem…
View article: Lumley Decomposition of the Turbulent Round Jet Far-field. Part 2 -- Dynamics
Lumley Decomposition of the Turbulent Round Jet Far-field. Part 2 -- Dynamics Open
In the current work the reconstruction of the far-field region of the turbulent axi-symmetric jet is performed in order to investigate the modal turbulence kinetic energy production contributions. The reconstruction of the field statistics…
View article: Lumley Decomposition of the Turbulent Round Jet Far-field. Part 1 -- Kinematics
Lumley Decomposition of the Turbulent Round Jet Far-field. Part 1 -- Kinematics Open
The current work presents a tensor formulation of the Lumley Decomposition (LD), introduced in its original form by Lumley (1967b), allowing decompositions of turbulent flow fields in curvilinear coordinates. The LD in his form is shown to…
View article: Experimental validation of additively manufactured optimized shapes for passive cooling
Experimental validation of additively manufactured optimized shapes for passive cooling Open
View article: Design of passive coolers for light-emitting diode lamps using topology optimisation
Design of passive coolers for light-emitting diode lamps using topology optimisation Open
View article: POD analysis of flow structures behind cylinders with concave fillets
POD analysis of flow structures behind cylinders with concave fillets Open
Surface modifications of cylinders using fillets are investigated with respect to flow structures in a cross flow to a cylinder. Three cylinders are used: a plain cylinder, a cylinder with a helical fillet and a cylinder with a helical sta…
View article: The Effect of Pulsations in Conditions related to Catalytic Converters
The Effect of Pulsations in Conditions related to Catalytic Converters Open
The effect of pulsations in a catalyst converter is investigated with the aim of determining if a steady flow captures the same physical phenomena as the pulsating flow. For this specific case, guide vanes are mounted in the sudden expansi…
View article: Continuous vs. pulsating flow boiling. Part 1: Experimental comparison and visualization
Continuous vs. pulsating flow boiling. Part 1: Experimental comparison and visualization Open
High heat exchanger performance is crucial to meet efficiency standards with low cost and environmental impact. Heat transfer performance may be improved by passive and active enhancement techniques applicable to air, liquid and phase chan…
View article: Continuous vs. pulsating flow boiling. Part 2: Statistical comparison using response surface methodology
Continuous vs. pulsating flow boiling. Part 2: Statistical comparison using response surface methodology Open
Design of experiments is a method for experimentation that enables the possibility to estimate effects and responses of certain factors and their interactions with statistical significance and low experimental effort. This approach include…
View article: Fano Resonances in the Time Domain
Fano Resonances in the Time Domain Open
The Fano phase formalism enables measurement and control of phase and amplitude of an emitting dipole. Here, we use this formalism to measure and understand the dynamics of bound atomic states in strong laser fields.
View article: Time-resolved study of ICD in Ne dimers using FEL radiation
Time-resolved study of ICD in Ne dimers using FEL radiation Open
View article: Phase reconstruction of strong-field excited systems by transient-absorption spectroscopy
Phase reconstruction of strong-field excited systems by transient-absorption spectroscopy Open
We study the evolution of a V-type three-level system, whose two resonances are coherently excited and coupled by two ultrashort laser pump and probe pulses, separated by a varying time delay. We relate the quantum dynamics of the excited …