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Rubino, A. (author)
The need to meet the increasingly demanding sustainability goals entails remarkable new challenges for technical innovation. Due to the crucial role of turbomachinery in present and future energy scenarios, advancements in turbomachinery performance by means of design methods represent a fundamental step towards global sustainable development....
doctoral thesis 2019
document
Mohammadzadeh Moghaddam, E. (author), Foumeny, Esmail A. (author), Stankiewicz, A.I. (author), Padding, J.T. (author)
Despite the substantial simplicities inherent in pseudo-continuum models of fixed bed reactors, there is a continued interest in the use of such models for predicting fluid flow and transport scalars. In this paper, we aim to quantitatively address the inadequacy of 2D pseudo-continuum models for narrow-tube fixed beds. We show this by...
journal article 2019
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van den Bos, L.M.M. (author), Koren, B (author), Dwight, R.P. (author)
The problem of non-intrusive uncertainty quantification is studied, with a focus on two computational fluid dynamics cases. A collocation method using quadrature or cubature rules is applied, where the simulations are selected deterministically. A one-dimensional quadrature rule is proposed which is nested, symmetric, and has positive weights....
conference paper 2016
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Bordogna, G. (author), Keuning, J.A. (author), Huijsmans, R.H.M. (author), Fossati, Fabio Vittorio (author), Belloli, Marco (author)
In recent years wind-assisted propulsion for commercial ships has gained an increasing interest as valuable alternative to reduce fuel pollutant emissions. However, the development of feasible and commercially viable wind propulsion systems to partially (or fully) propel a ship is nowadays hindered by the difficulties of modelling the...
conference paper 2016
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Rotteveel, E. (author), van der Ploeg, A (author), Hekkenberg, R.G. (author)
Shallow water effects change the flow around a ship significantly which can affect the optimum design of the hull. This paper describes a study into the optimization of the aft ship region for various water depths. The research focuses on variations of the following parameters of a hull form: The athwart ship’s propeller location, the tunnel top...
conference paper 2016
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Liu, J. (author), Hekkenberg, R.G. (author)
In order to reach the required manoeuvrability, inland vessels often use twin rudders, but the interaction effects are poorly understood. To achieve a proper configuration, this paper applies 2D RANS simulations to analyse the interaction effects on the twin-rudder hydrodynamics. Various twin-rudder configurations with different profiles and...
conference paper 2016
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Van der Velden, W.C.P. (author), Van Zuijlen, A.H. (author), De Jong, A.T. (author), Bijl, H. (author)
A Large Eddy Simulation (LES) with four different closure models are analyzed in OpenFOAM, an open source Computional Fluid Dynamics (CFD) package and validated for the determination of the streamwise and spanwise coherence length of the pressure field below a turbulent boundary layer at low Reynolds numbers. Matching results are found for outer...
conference paper 2014
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Javed, A. (author)
doctoral thesis 2014
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Moya, R. (author), Salim, F. (author), Williams, M. (author), Sharaidin, K. (author)
The aims of the Flexing Wind project, investigated in an intensive cross-disciplinary course, were twofold. First was to learn about aerodynamic phenomena around buildings. Second was to explore ways to observe, measure, and control the negative effects of wind around specific pedestrian areas, tram stops, and public sites in Melbourne City....
conference paper 2013
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Saldi, Z.S. (author)
Extending the weldability of novel materials, and improving the weld quality by tailoring weld microstructures are key factors to obtain the welding techniques demanded in the modern manufacturing industries. This can be done, for example, by feeding chemical elements from a consumable wire into the weld pool during welding. The mixing of...
doctoral thesis 2012
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Markesteijn, A.P. (author)
One of the most important developments in the last centuries is the process of miniaturisation and understanding everything that it entails. For the physical sciences this meant the continuing discovery what matter is and how it behaves, while from a practical point of view it meant that more advanced medical, scientific, and consumer...
doctoral thesis 2011
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Kritzinger, H.P. (author)
The Monolithic Stirrer Reactor (MSR) is a novel concept for heterogeneously catalyzed reactors and is presented as an alternative device to slurry reactors. It uses a modified stirrer on which structured catalyst supports (monoliths) are fixed to form permeable blades. The monoliths consist of small square parallel channels on which a layer of...
doctoral thesis 2011
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Loeven, G.J.A. (author)
When modeling physical systems, several sources of uncertainty are present. For example, variability in boundary conditions like free stream velocity or ambient pressure are always present. Furthermore, uncertainties in geometry arise from production tolerances, wear or unknown deformations under loading. Uncertainties in computational fluid...
doctoral thesis 2010
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Bos, F.M. (author)
Both biological and engineering scientist have always been intrigued by the flight of insects and birds. For a long time, the aerodynamic mechanism behind flapping insect flight was a complete mystery. Recently, several experimental and numerical flow visualisations were performed to investigate the aerodynamics around flapping wings. Flapping...
doctoral thesis 2010
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Carpentieri, G. (author)
This thesis presents a shape optimization framework for problems that are encountered routinely in Aerodynamic Design. The nature of the framework is numerical. Its focus is wide as different aspects of the shape optimization practice are treated, e.g., the solution of the flow equations, the sensitivity analysis and the parameterization of the...
doctoral thesis 2009
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Christakis, N. (author), Chapelle, P. (author), Patel, M.K. (author), Cross, M. (author)
Many industrial processes involve particulates with materials ranging from pharmaceuticals, ceramics, cosmetics and foods. Common to all these particulate processes is the discharge of granular material from bins/hoppers in either mass flow mode (i.e. all material regions in the domain are in motion) or core flow mode (i.e. there is a flowing...
conference paper 2006
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Verstraete, T. (author), Alsalihi, Z. (author), Van den Braembussche, R.A. (author)
A Conjugate Heat Transfer (CHT) analysis allows the calculation of the heat transfer and temperature of a body placed in a fluid. The CHT analysis takes into account both the conduction in the solid and the convection in the fluid. Present paper describes a CHT method that uses two separate solvers: one CFD solver dedicated to the flow...
conference paper 2006
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Alauzet, F. (author)
This paper presents an accurate approach to simulate the sonic boom of a supersonic aircraft. The near field flow is modeled by the conservative Euler equations and is solved using a finite volume approach on adapted unstructured tetrahedral meshes. Then, from the CFD solution, the pressure distribution under the aircraft is extracted and used...
conference paper 2006
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Aglave, R.H. (author), Warnatz, J. (author)
Detailed mechanisms describing ignition, flame propagation and pollutant formation typically involve several hundred species and elementary reactions, prohibiting their use in practical three-dimensional engine simulations. Conventionally reduced mechanisms often fail to predict minor radicals and pollutant precursors. The ILDM-method is an...
conference paper 2006
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Yao, J. (author), Patel, M.K. (author), Yao, Y. (author), Mason, P.J. (author)
Numerical simulation has been conducted for the investigation of heat transfer in a rectangular, high–aspect ratio microchannel with heat sinks, similar to an experimental study. Water at ambient temperature is used as working fluid and the heating power of 180 W is introduced via electronic cartridges in the solids. Three channel heights of 0.3...
conference paper 2006
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