Journal ArticleDOI
Thermal-hydraulic characteristics of purge gas in a rectangular packed pebble bed of a fusion reactor using DEM-CFD and porous medium analyses
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In this paper, the thermal-hydraulic characteristics of helium as a purge gas for the removal of tritium from a spherical packed rectangular pebble bed reactor are studied using the DEM-CFD and porous medium approaches.About:
This article is published in Fusion Engineering and Design.The article was published on 2020-11-01. It has received 11 citations till now. The article focuses on the topics: Porous medium & Heat transfer.read more
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A review of recent study on the characteristics and applications of pebble flows in nuclear engineering
TL;DR: In this paper , the authors reviewed the recent three-year progress on the investigations of pebble bed flows in nuclear engineering and included both the application of PEBble beds in the fission reactors and the fusion reactors.
Journal ArticleDOI
CFD Investigation of helium gas flow in sphere packed (Pebble bed) in a rectangular canister using OpenFOAM
TL;DR: In this article, the authors investigated the flow field of helium gas and temperature distribution inside a rectangular canister, considering the pebble bed as the porous medium, and the effect of different heat generation rates, mass flow rates, and packing arrangements (random and uniform arrangements) on the flow-field and temperature profile.
Journal ArticleDOI
Radiative heat transfer with a blocked-off approach for application in the discrete element method
TL;DR: In this article, a single cubic DEM object is located within a prismatic enclosure and the temperature of all walls of the enclosure and of the surface of the DEM object are set to fixed values.
Journal ArticleDOI
Performance analysis of an air rock thermocline TES tank for concentrated solar power plants using the coupled DEM–CFD approach
TL;DR: In this paper, a discrete element method (DEM) combined with a numerical model of computational fluid dynamics (CFD) was adopted to investigate the thermal performance of a scale model of an air rock thermocline TES tank.
Journal ArticleDOI
DEM study of packing and connectivity of binary-sized pebbles according to their size and mixing ratios under vibration conditions
TL;DR: In this paper, the packing fractions of the pebble beds were analyzed according to the size and volume ratios of binary-sized pebbles as well as the vibration frequency and direction of PEBble beds.
References
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Journal Article
Discrete numerical model for granular assemblies.
Peter Cundall,Otto D. L. Strack +1 more
TL;DR: The distinct element method as mentioned in this paper is a numerical model capable of describing the mechanical behavior of assemblies of discs and spheres and is based on the use of an explicit numerical scheme in which the interaction of the particles is monitored contact by contact and the motion of the objects modelled particle by particle.
Journal ArticleDOI
A discrete numerical model for granular assemblies
Peter Cundall,Otto D. L. Strack +1 more
TL;DR: The distinct element method as mentioned in this paper is a numerical model capable of describing the mechanical behavior of assemblies of discs and spheres and is based on the use of an explicit numerical scheme in which the interaction of the particles is monitored contact by contact and the motion of the objects modelled particle by particle.
Book
Lectures in mathematical models of turbulence
Brian Launder,D. B. Spalding +1 more
TL;DR: In this article, a lecture in mathematical models of turbulence is presented. But it is based on a mathematical model of turbulence, not on a real world scenario, and it is not suitable for discussion.
Journal ArticleDOI
Effect of fluid dispersion coefficients on particle-to-fluid mass transfer coefficients in packed beds. correlation of sherwood numbers
N. Wakao,T. Funazkri +1 more
TL;DR: In this article, the published heat transfer data obtained from steady and nonsteady measurements are corrected for the axial fluid thermal dispersion coefficient values proposed by Wakao and Funazkri.
Journal ArticleDOI
DEM-CFD simulations of fixed bed reactors with small tube to particle diameter ratios
TL;DR: In this paper, a new meshing method for fixed beds consisting of monodisperse spherical particles is presented, where the particles are flattened near the particle-particle and particle-wall contact points, respectively, to avoid bad cell qualities.