Searched for: subject:"Reynolds%5C+stresses"
(1 - 13 of 13)
document
Kanawade, Kunal (author)
In nuclear industry applications, from design and safety aspects, it is important to predict the flow and heat transfer. The passive cooling systems, one of the robust cooling systems in the nuclear design are based on natural convections. In the RANS approach, non-linear unknown heat flux term has to be closed by appropriate model for accurate...
master thesis 2019
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Schmelzer, M. (author), Dwight, R.P. (author), Cinnella, Paola (author)
A novel deterministic symbolic regression method SpaRTA (Sparse Regression of Turbulent Stress Anisotropy) is introduced to infer algebraic stress models for the closure of RANS equations directly from high-fidelity LES or DNS data. The models are written as tensor polynomials and are built from a library of candidate functions. The machine...
journal article 2019
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Rijnsburger, S. (author), Flores, Raúl P. (author), Pietrzak, J.D. (author), Horner-Devine, Alexander R. (author), Souza, Alejandro J. (author)
In this study we used field data and radar images to investigate the influence of winds and tides on the propagation of tidal plume fronts. The measurements were collected in a shallow shelf region off the Dutch coast, 10 km north of the Rhine River mouth, and they clearly show the passage of distinct freshwater lenses and associated fronts...
journal article 2018
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Schoenmaker, Lars (author)
In this thesis diffuser performance will be simulated with computational fluid dynamics, which will be done with the program Ansys Fluent. The expanding geometry creates an adverse pressure gradient and under certain conditions there will also be separation.<br/><br/>At first a relative simple simulation will be done of a one-directional...
master thesis 2017
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Meijers, P.C. (author)
Turbulence plays an important role in a broad range of engineering applications. In the industry RANS simulations are a common method for predicting turbulent flow. A broad range of RANS turbulence models have been developed over the past decades. For the assessment of complex three-dimensional flow fields Reynolds Stress Transport Models are a...
master thesis 2016
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Meijers, P.C. (author)
Additional thesis with a size of 10 European Credits. The increasing demand for wind energy has led to the development of more efficient wind turbines. A common way to increase the performance of wind turbines is the use of vortex generators. Vortex generators are small devices that are mounted on the turbine blade and they create a stream wise...
student report 2015
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Righolt, B.W. (author), Kenjeres, S. (author), Kalter, R. (author), Tummers, M.J. (author), Kleijn, C.R. (author)
We demonstrate how the self-sustained oscillation of a confined jet in a thin cavity can be quantitatively described by a zero-dimensional model of the delay differential equation type with two a priori predicted model constants. This model describes the three phases in self-sustained oscillations: (i) pressure driven growth of the oscillation, ...
journal article 2015
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Eisma, H.E. (author), Westerweel, J. (author), Ooms, G. (author), Elsinga, G.E. (author)
New experimental research is presented on the characteristics of interfaces and internal shear layers that are present in a turbulent boundary layer (TBL). The turbulent/non-turbulent (T/NT) interface at the outer boundary of the TBL shows the presence of a finite jump in streamwise velocity and is characterised by a thin shear layer. It appears...
journal article 2015
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Salewski, M. (author), Eckhardt, B.E. (author)
Shearing and rotational forces in fluids can significantly alter the transport of momentum. A numerical investigation was undertaken to study the role of these forces using plane Couette flow subject to rotation about an axis perpendicular to both wall-normal and streamwise directions. Using a set of progressively higher Reynolds numbers up to...
journal article 2015
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Van der Steen, M. (author)
The main objective of the present experimental investigation is to study the turbulent reacting flow field in the region where a stable premixed flame jet (Re = 3250 and ?= 1.3) impinges normally on a cooled cylinder and gain a better understanding of the effect of the cylinder wall temperature. PIV measurements were done in a plane normal to...
master thesis 2014
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Wei, L. (author), Elsinga, G.E. (author), Brethouwer, G. (author), Schlatter, P. (author), Johansson, A.V. (author)
The Reynolds number scaling of flow topology in the eigenframe of the strain-rate tensor is investigated for wall-bounded flows, which is motivated by earlier works showing that such topologies appear to be qualitatively universal across turbulent flows. The databases used in the current study are from direct numerical simulations (DNS) of fully...
journal article 2014
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Klopman, G. (author)
Changes in the mean horizontal-velocity profile in combined wave-current motion, outside the bottom boundary-layer, are essential for the correct prediction of cross-shore sediment transport outside the surf zone and the transport of dissolved matter, e.g. Klopman (1992). To be able to verify mathematical and numerical models (see Klopman, 1992)...
report 1994
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Patel, R.P. (author)
Measurements of the turbulent stresses in fully-developed pipe flow have been made as an overall test of the DISA constant-temperature hot-wire anemometer. The measurements were made with single slanting wires and a normal wire. The shearing stress was measured at two Reynolds numbers and compared with values computed from the pressure drop down...
report 1963
Searched for: subject:"Reynolds%5C+stresses"
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