editorial progress of particle flow, fluid/solid mechanics...

EditorialProgress of Particle Flow, Fluid/Solid Mechanics, andHeat Transfer in Advanced Gas/Water Nuclear Reactors

Nan Gui,1 Xiangdong Li,2 and Xin Tu3

1 Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China2School of Engineering, RMIT University, Melbourne, VIC, Australia3University of Liverpool, Liverpool, UK

Correspondence should be addressed to Nan Gui; guinan@mail.tsinghua.edu.cn

Received 14 November 2016; Accepted 15 November 2016

Copyright © 2016 Nan Gui et al.This is an open access article distributed under the Creative Commons Attribution License, whichpermits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Particle flow, fluid/solid mechanics, and heat transfer arevery important to many technologies and applications of theadvanced gas/water nuclear reactors. To better understandthe relevant knowledge of particle flow, complex interactions(including multiphase thermal hydraulics), flow mechanics,and heat transfer certainly help improve the development ofadvanced nuclear reactors.

An introductory review of the accepted papers is pre-sented here. In the paper entitled “A Calculation Methodfor the Sloshing Impact Pressure Imposed on the Roof ofa Passive Water Storage Tank of AP 1000,” to estimate theimpact pressure imposed on the roof of water storage tank ofAP 1000, a simplified method was proposed to approximatethe difference betweenmaximumwave height and roof heightas the impact pressure head. By experimental validation,this method may overpredict the impact pressure. But theerror is no more than 35%. In the paper entitled “ThermalAnalysis for the Dense Granular Target of CIADS,” a newconcept of a dense granular spallation target is proposedfor which the tungsten granules are chosen as the targetmaterial for the China Initiative Accelerator Driven ReactorSystem (CIADS). After being bombarded by the acceleratedprotons from the accelerator, the tungsten granules withhigh temperature flow out of the subcritical reactor andthe heat is removed by the heat exchanger. In the paperentitled “A Study on the Instantaneous Turbulent Flow Fieldin a 90-Degree Elbow Pipe with Circular Section,” largeeddy simulation was adopted to predict instantaneous flowfield in the 90-degree elbow pipe. Instantaneous pressure

information and velocity field were analyzed at specific mon-itoring points. In the paper entitled “Wave Characteristicsof Falling Film on Inclination Plate at Moderate ReynoldsNumber,” falling water film on an inclined plane is studiedby shadowgraphy with different inclination angle and thefilm Reynolds number. Three distinctive regimes and threecharacteristic parameters of two-dimensional solitary wavepattern are examined, which are significant in engineeringapplications for estimation of heat and mass transfer onfilm flow. In the paper entitled “Parametric Investigationand Thermoeconomic Optimization of a Combined Cyclefor Recovering the Waste Heat from Nuclear Closed BraytonCycle,” a combined cycle that combines an AWMcycle with anuclear closed Brayton cycle is proposed to recover the wasteheat rejected from the precooler of a nuclear closed Braytoncycle. The effects of several important parameters are inves-tigated and the combined cycle performance is optimizedbased on a multiobjective function. In the paper entitled“Numerical Investigation on Bubble Growth and SlidingProcess of Subcooled Flow Boiling in Narrow RectangularChannel,” a boiling phase change model in subcooled flowboiling is proposed, and VOF model combined with phasechangemodel is adopted to simulate the single bubble growthand movement. Finally, in the paper entitled “Assessmentof Prediction Capabilities of COCOSYS and CFX Code forSimplified Containment,” the actual capability of CFX tooland COCOSYS code is assessed in prototypical geometriesfor simplified physical process-plume under adiabatic andconvection boundary condition, respectively.

Hindawi Publishing CorporationScience and Technology of Nuclear InstallationsVolume 2016, Article ID 2512634, 2 pageshttp://dx.doi.org/10.1155/2016/2512634

2 Science and Technology of Nuclear Installations

Acknowledgments

We would like to thank all the contributors of this specialissue for their support and cooperation. The evaluation ofpaper’s quality by qualified reviewers is greatly appreciated aswell. The work of Nan Gui was supported under the NationalNatural Science Foundation of China (Grant no. 51576211).

Nan GuiXiangdong Li

Xin Tu

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