Searched for: author%3A%22Tummers%2C+M.J.%22
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Valori, V. (author), Elsinga, G.E. (author), Rohde, M. (author), Tummers, M.J. (author), Westerweel, J. (author), van der Hagen, T.H.J.J. (author)
journal article 2017
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Huang, X. (author), Tummers, M.J. (author), Roekaerts, D.J.E.M. (author)
Mild combustion in a lab-scale furnace has been experimentally and numerically studied. The furnace was operated with Dutch natural gas (DNG) at 10 kW and at an equivalence ratio of 0.8. OH∗chemiluminescence images were taken to characterize the reaction zone. The chemiluminescence intensity is relatively low compared to conventional flames...
conference paper 2017
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Huang, X. (author), Tummers, M.J. (author), Roekaerts, D.J.E.M. (author)
Mild combustion in a lab-scale furnace has been experimentally and numerically studied. The furnace was operated with Dutch natural gas (DNG) at 10 kW and at an equivalence ratio of 0.8. OH∗chemiluminescence images were taken to characterize the reaction zone. The chemiluminescence intensity is relatively low compared to conventional flames...
abstract 2016
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Righolt, B.W. (author), Kenjeres, S. (author), Kalter, R. (author), Tummers, M.J. (author), Kleijn, C.R. (author)
We study the flow in a layer of conductive liquid under the influence of surface tension, gravity, and Lorentz forces due to imposed potential differences and transverse magnetic fields, as a function of the Hartmann number, the Bond number, the Reynolds number, the capillary number and the height-to-width ratio A. For aspect ratios A 1 and...
journal article 2016
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Righolt, B.W. (author), Kenjeres, S. (author), Kalter, R. (author), Tummers, M.J. (author), Kleijn, C.R. (author)
Control of self-sustained jet oscillations in confined cavities is of importance for many industrial applications. It has been shown that the mechanism underlying these oscillations consists of three stages: (i) growth of the oscillation, (ii) amplitude limitation and (iii) delayed destruction of the recirculation zone bounding the jet. It has...
journal article 2016
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Birvalski, M. (author), Tummers, M.J. (author), Henkes, R.A.W.M. (author)
An experimental study was performed in stratified wavy flow of air and water through a horizontal pipe. The velocity fields in both phases were measured simultaneously using PIV and the interfacial shape was resolved using a profile capturing technique. The objective of the study was to investigate the interfacial characteristics and the...
journal article 2016
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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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Valori, V. (author), Elsinga, G.E. (author), Rohde, M. (author), Tummers, M.J. (author), Westerweel, J. (author), van der Hagen, T.H.J.J. (author)
The High Performance Light Water Reactor (HPLWR) is one of the six innovative nuclear energy systems proposed by the Generation IV International Forum. The use of water at supercritical pressure as the coolant in the HPLWR allows a significative increase of the thermal efficiency of the power plant, a reduction in size and complexity of the...
conference paper 2015
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Kalter, R. (author), Tummers, M.J. (author), Kenjeres, S. (author), Righolt, B.W. (author), Kleijn, C.R. (author)
The influence of electromagnetic forcing on self-sustained oscillations of a jet issuing from a submerged nozzle into a thin vertical cavity (width W much larger than thickness T) has been studied using particle image velocimetry. A permanent Lorentz force is produced by applying an electrical current across the width of the cavity in...
journal article 2014
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Verdoold, J. (author), Tummers, M.J. (author), Hanjali?, K. (author)
Based on a detailed experimental investigation in an aspect-ratio-4 rectangular cell in the range 3.7×107?Ra?3.7×109, we present evidence of possible scenarios of the long-term dynamics of large-scale circulations (LSC) in bounded large-aspect-ratio turbulent Rayleigh-Bénard convection. Karhunen-Loève analysis of instantaneous velocity fields...
journal article 2009
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Kenjeres, S. (author), Verdoold, J. (author), Tummers, M.J. (author), Hanjalic, K. (author), Kleijn, C.R. (author)
The paper reports on numerical and experimental investigations of electromagnetically driven vortical flows of an electrically conductive fluid in a generic setup. Two different configurations of permanent magnets are considered: a 3-magnet configuration in which the resulting Lorentz force is focused in the wall-boundary layers, and a 2-magnet...
journal article 2009
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Hanjalic, K. (author), Kenjeres, S. (author), Tummers, M.J. (author), Jonker, H.J.J. (author)
These lecture notes contain the course material Advanced Physical Transport Phenomena, offered in the Master’s programme in Applied Physics at Delft University of Technology. The notes follow in part the concept and content of the book Fysische Transportverschijnselen II (in Dutch) by Hoogendoorn and Van der Meer (Delft University Press, 1991)....
book 2009
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Verdoold, J. (author), Van Reeuwijk, M. (author), Tummers, M.J. (author), Jonker, H.J. (author), Hanjalic, K. (author)
journal article 2008
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Verdoold, J. (author), Tummers, M.J. (author), Hanjalic, K. (author)
journal article 2006
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Geers, L.F.G. (author), Hanjalic, K. (author), Tummers, M.J. (author)
journal article 2006
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Geers, L.F.G. (author), Tummers, M.J. (author), Hanjali?, K. (author)
To gain a better insight into the effects of eddy structure and their thermal imprint on the impinging surface, we applied several methods to identify coherent structures in two arrangements of multiple jets. High-resolution particle imaging velocimetry measurements of the instantaneous fluid velocity have been performed to provide data for...
journal article 2005
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Tummers, M.J. (author)
doctoral thesis 1999
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Tummers, M.J. (author), Passchier, D.M. (author)
The estimation of the autocorrelation function (act) or the spectral density function (sdt) from LDA data poses unique data-processing problems. The random sampling times in LDA preclude the use of the spectral methods for equi-spaced samples. As a consequence, special data-processing algorithms are used to process the LDA data. However, the...
book 1998
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Tummers, M.J. (author), Passchier, D.M. (author)
report 1996
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