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Kahouadji, Lyes,Nowak, Emilia,Kovalchuk, Nina,Chergui, Jalel,Juric, Damir,Shin, Seungwon,Simmons, Mark J. H.,Craster, Richard V.,Matar, Omar K. Springer Berlin Heidelberg 2018 MICROFLUIDICS AND NANOFLUIDICS Vol.22 No.11
<P>The three-dimensional two-phase flow dynamics inside a microfluidic device of complex geometry is simulated using a parallel, hybrid front-tracking/level-set solver. The numerical framework employed circumvents numerous meshing issues normally associated with constructing complex geometries within typical computational fluid dynamics packages. The device considered in the present work is constructed via a module that defines solid objects by means of a static distance function. The construction combines primitive objects, such as a cylinder, a plane, and a torus, for instance, using simple geometrical operations. The numerical solutions predicted encompass dripping and jetting, and transitions in flow patterns are observed featuring the formation of drops, ‘pancakes’, plugs, and jets, over a wide range of flow rate ratios. We demonstrate the fact that vortex formation accompanies the development of certain flow patterns, and elucidate its role in their underlying mechanisms. Experimental visualisation with a high-speed imaging are also carried out. The numerical predictions are in excellent agreement with the experimental data.</P><P><B>Electronic supplementary material</B></P><P>The online version of this article (doi:10.1007/s10404-018-2149-y) contains supplementary material, which is available to authorized users.</P>
PYF: Predictions of Fragment Mass Yields for Transmutation of Minor Actinides
D. M. Gorodisskiy,K. V. Kovalchuk,,S. I. Mulgin,A. Ya Rusanov,S. V. Zhdanov 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
A new code PYF for calculating relative mass yields of primary and finalfragments from 5 - 200 MeV proton and neutron induced fission of target nucleiTh-Bk is proposed. The calculation algorithm is based on the effects ofisotopic quasi-invariance of fragment charge distributions from asymmetricfission of actinide nuclei at excitation energies above 12 MeV. Predictionsof the PYF have been successfully compared to a wide set of experimentaldata. The predictive power of the PYF shows that it can be used as a basisfor calculating the neutron-induced fission product yields in the interestsof the transmutation of minor actinides in the Accelerator-Driven Systemsand for other practical applications.