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By varying the wavenumber over a large and finely discretized interval of values, we analyse the phase and group velocity of linear three-dimensional travelling waves both in the plane wake and channel flows to get the transition between dispersive and non-dispersive behaviour. The dispersion relation is computed from the Orr-Sommerfeld and...
conference paper 2015
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Vita, P. (author)
Investigation of the factors and uncertainties affecting the European biodiesel market performed through Exploratory Modelling and Analysis. This includes the employment of the EMA Workbench software in order to run numerous computational experiments with a bespoke system dynamics model.
master thesis 2015
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Welschen, Y. (author)
master thesis 2015
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Modeling of heavy particles motion in turbulent flows still represents a challenge in engineering applications at high Reynolds number. Various techniques have arisen for describing such mono-dispersed solid phases with statistical methods. Some of those techniques relies on the assumption of using a velocity field to describe the particles...
conference paper 2015
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Upper ocean turbulence is a very relevant process within the context of quantifying the exchange between the atmosphere and the ocean. We present results of a study of turbulence induced by non-breaking waves from detailed observation in a small wave tank facility in the Faculty of Marine Science of the University of Baja California. The...
conference paper 2015
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We use ODTLES, a multi-dimensional extension of the One-Dimensional-Turbulence model (ODT). ODT describes turbulent advection on a 1D sub-domain using a stochastic process for turbulent advection. These 1D sub-domains are coupled to obtain a 3D approach. ODTLES is applied to channel flow. Preliminary results for the pdf of the wall shear stress...
conference paper 2015
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State-of-the-art direct numerical simulations of rotating turbulence at changing Reynolds and Rossby numbers are presented. Flow is also seeded with millions of particles, with and without inertia, light and heavy. We study two regimes, at high and low rotation. Heavy and light particles are injected along different axis of rotations, allowing...
conference paper 2015
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Small aerosols drift down temperature or turbulence gradient since faster particles fly longer distances before equilibration. That fundamental phenomenon, called thermophoresis or turbophoresis, is widely encountered in nature and used in industry. It is universally believed that particles moving down the kinetic energy gradient must...
conference paper 2015
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We perform renormalization group analysis (RG) of the Navier-Stokes equation in the presence of constant mean velocity field $\mathbf U_0$, and show that the renormalized viscosity is unaffected by $\mathbf U_0$, thus negating the ``sweeping effect", proposed by Kraichnan [Phys. Fluids {\bf 7}, 1723 (1964)] using random Galilean invariance....
conference paper 2015
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Schuberth, M.G. (author)
In marine seismic acquisitions, a major deteriorating effect on resolution is caused by ghost re- flections. Sensors towed at depth within a water column record not only the desired up-going wavefield reflected from geological formations, but also its reflections from the sea surface known as down-going wavefield, or seismic ghost. This...
master thesis 2015
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Mutgi, A.V. (author)
Hot formed steels are witnessing an increasing use in safety critical and structural parts for automobiles due to their high strength, light weight and absence of springback, due to which understanding the corrosion behaviour of coated products for hot forming is crucial to increase their stronghold in Body-In-White (BIW) applications for...
master thesis 2015
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Gunnink, T. (author)
Tidal energy converters are an emerging technology with the potential to expand the portfolio of renewable energy sources. Bluewater is developing the BlueTEC, a floating tidal energy converter with two variable pitch turbines. From research on floating wind turbines, it is known that control is fundamentally limited due to right hand plane...
master thesis 2015
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Dinh, P.L. (author)
The new concept introduces a patient-specific commode, achieved by connecting the commode to the hospital bed. This will diminish the chances of cross-contamination between patients. The one-person-use will save the nurses up to 30 minutes of cleaning time per use. The features integrated into the concept will be supporting the nurses during...
master thesis 2015
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In this contribution an application of a computational aeroacoustics code (CAA) as a hybrid Zonal DNS tool is presented. The here used hybrid approach is based on a novel implementation of the Non-Linear Perturbation Equations (NLPE) extended with viscous terms, denoted as overset since a perturbation analysis is performed on top of a background...
conference paper 2015
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Elferink, H. (author)
SamenDoen is a platform designed for young seniors to expand their social network through joining in local activities with others. The platform facilitates organising activities in six different categories. When registered to SamenDoen a user can sign up and join activities in their area. The activities will be organised by both Menzis and by...
master thesis 2015
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Preferential concentration in turbulence is a process that causes inertial particles to cluster in regions of high strain (in-between high vorticity regions), with specifics depending on their stopping time or Stokes number. This process is thought to be of importance in various problems including cloud droplet formation and aerosol transport in...
conference paper 2015
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Markenhof, J. (author)
Dark current noise in image sensors is highly sensitive to temperature, and a difference in temperature in image sensors can be seen in the image as a non-uniform noise source. Many CMOS image sensors are integrated in mobile devices and lack a physical shutter to generate dark frame subtraction to compensate for dark current noise. In this...
master thesis 2015
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Hakim, A.R. (author)
The thesis deals with the modeling and simulation of distance relays in ATP - EMTP. Transmission line which is 125.6 miles long operates at 60 Hz and 115 kV line voltages are simulated in ATP - EMTP. The first part of the thesis discusses the implementation and simulation of the ATP - EMTP model for microprocessor based mho distance relay using...
master thesis 2015
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The orientation distribution and rotations of anisotropic particles in turbulent flows play a key role in many applications ranging from icy clouds to papermaking and drag reduction in pipe flow. However, experimental access to time-resolved orientations of anisotropic particles has not been easy to achieve. The use of 3D printing opens up the...
conference paper 2015
document
Heredia, G.H. (author)
This master thesis explores and develops a sustainable footwear solution. An aesthetics approach was taken in parallel in the attempt of creating a timeless design.
master thesis 2015
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