Journal ArticleDOI
Modelling of dust lifting process behind propagating shock wave
Przemyslaw Zydak,R. Klemens +1 more
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In this paper, a phenomenological model of the dust dispersion process from a layer was developed and three improvements of the model were studied: Saffman force, Magnus force and particles collisions.Abstract:
Dust dispersion from a layer is a complicated problem, which has not been completely solved yet, especially if an Eulerian–Eulerian approach has to be used to model the two-phase dusty flow. In previous investigation, a phenomenological model of the dust dispersion process from a layer was developed, but the evaluation of the model revealed some weaknesses. In the current paper, the model of the dust dispersion process was presented and three improvements of the model were studied: Saffman force, Magnus force and particles collisions. The implementation of Magnus and Saffman forces into the code did not improve the numerical results and it was shown that it had very little influence on the dust lifting process, in case the phenomenological model of the layer is used. Some explanations were proposed in the paper. Besides, an empirical model of particles collisions was also added to the code and its influence on the results was studied. It was shown that the particles collisions model improved the obtained results, but further modifications are to be studied in the future.read more
Citations
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A multiphase model for compressible granular–gaseous flows: formulation and initial tests
Ryan W. Houim,Elaine S. Oran +1 more
TL;DR: In this paper, a model for predicting the behavior of a compressible flow laden with shocks interacting with granular material has been developed and tested, consisting of two sets of coupled Euler equations, one for the gas phase and the other for the granular phase.
Journal ArticleDOI
Review of the DESC project
TL;DR: The first version of the DESC simulation code as discussed by the authors is based on the existing FLame ACceleration Simulator (FLACS) for gas explosions, and the simulation approach adopted in the first version entails the extraction of combustion parameters from pressuretime histories measured in standardized 20-l explosion vessels.
Journal ArticleDOI
Numerical simulation of dilute and dense layered coal-dust explosions
Ryan W. Houim,Elaine S. Oran +1 more
TL;DR: In this article, multidimensional time-dependent simulations were performed to study the interaction of a shock wave and resulting shear layer with layers of coal dust, and the final result is a coupled complex consisting of a coal-dust flame.
Journal ArticleDOI
Multiple explosions induced by the deposited dust layer in enclosed pipeline.
Yifan Song,Qi Zhang +1 more
TL;DR: A numerical model is presented for simulating the progress of deposited dust explosion in the enclosed pipelines and the results reveal the influence of the pipeline length-diameter ratio and the total amount of the deposited dust on the multiple explosions.
Journal ArticleDOI
Three-dimensional simulation of a dust lifting process with varying parameters
TL;DR: In this paper, the Eulerian-Lagrangian model is used to simulate the lifting process of a single particle in a three-dimensional domain, and the results of the simulations are shown as snapshots of particle position at certain points in time after the passage of a shock wave.
References
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Book
Riemann Solvers and Numerical Methods for Fluid Dynamics
TL;DR: In this article, the authors present references and index Reference Record created on 2004-09-07, modified on 2016-08-08 and a reference record created on 2003-09 -07.
Journal ArticleDOI
The lift on a small sphere in a slow shear flow
TL;DR: In this article, it was shown that a sphere moving through a very viscous liquid with velocity V relative to a uniform simple shear, the translation velocity being parallel to the streamlines and measured relative to streamline through the centre, experiences a lift force 81·2μVa2k½/v½ + smaller terms perpendicular to the flow direction, which acts to deflect the particle towards the streamline moving in the direction opposite to V.
Journal ArticleDOI
The virtual mass and lift force on a sphere in rotating and straining inviscid flow
Donald A. Drew,Richard T. Lahey +1 more
TL;DR: In this article, the authors calculate the force s-exercant sur a sphere unique en accelation par rapport a un fluide non visqueux soumis a une deformation pure and une rotation loin de the sphere.
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Dynamics of dust dispersion from the layer behind the propagating shock wave
TL;DR: In this article, the authors investigated experimentally the process of dust lifting from a layer by using a high-speed camera working together with a Schlieren system, where the measurements of the dust concentration behind the propagating shock wave were presented and analyzed.
Journal ArticleDOI
Mixing in Wave Processes Propagating in Gas Mixtures (Review)
A. V. Fedorov,A. V. Fedorov +1 more
TL;DR: A review of physicomathematical modeling of mixing of solid particles with high velocity gas flows arising under the action on shock waves, compression waves, and expansion waves on unstable dust deposits on the boundaries of channels or plates and in cavities, as well as on free clouds of particles are described in this article.