Discrete Element Method–Based Investigations of Granular Flow in a Pebble Bed Reactor

2017 ◽  
Vol 199 (1) ◽  
pp. 47-66
Author(s):  
Vaibhav Khane ◽  
Mahmoud M. Taha ◽  
Gary E. Mueller ◽  
Muthanna H. Al-Dahhan
Keyword(s):  
Discrete Element Method ◽  
Granular Flow ◽  
Discrete Element ◽  
Pebble Bed ◽  
Pebble Bed Reactor ◽  
Element Method

Discrete element method modeling of non-spherical granular flow in rectangular hopper

2010 ◽  
Vol 49 (2) ◽  
pp. 151-158 ◽  
Author(s):  
He Tao ◽  
Baosheng Jin ◽  
Wenqi Zhong ◽  
Xiaofang Wang ◽  
Bing Ren ◽  
...  
Keyword(s):  
Discrete Element Method ◽  
Granular Flow ◽  
Discrete Element ◽  
Element Method

Combined CFD and DEM Simulations of Fluid Flow and Heat Transfer in a Pebble Bed Reactor

2011 ◽  
Author(s):  
Xiang Zhao ◽  
Trent Montgomery ◽  
Sijun Zhang
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Discrete Element Method ◽  
Reactor Core ◽  
Turbulence Models ◽  
Discrete Element ◽  
Pebble Bed ◽  
Pebble Bed Reactor ◽  
Packing Structure ◽  
Dem Simulations

This paper presents combined computational fluid dynamics (CFD) and discrete element method (DEM) simulations of fluid flow and relevant heat transfer in the pebble bed reactor core. In the pebble bed reactor core, the coolant passes highly complicated flow channels, which are formed by thousands of pebbles in a random way. The random packing structure of pebbles is crucial to CFD simulations results. The realistic packing structure in an entire pebble bed reactor (PBR) is generated by discrete element method (DEM). While in CFD calculations, selection of the turbulence models have great importance in accuracy and capturing the details of the flow features, in our numerical simulations both large eddy simulation (LES) and Reynolds-averaged Navier-Stokes (RANS) models are employed to investigate the effects of different turbulence models on gas flow field and relevant heat transfer. The calculations indicate the complex flow structure within the voids between the pebbles.

Discrete Element Simulations of Granular Flow in a Pebble Bed Reactor

2009 ◽  
Author(s):  
Xiang Zhao ◽  
Trent Montgomery ◽  
Sijun Zhang
Keyword(s):  
Granular Flow ◽  
Discrete Element ◽  
Wall Friction ◽  
Pebble Bed ◽  
Mean Velocity ◽  
Pebble Bed Reactor ◽  
Particle Mixing ◽  
Similarity And Difference ◽  
Velocity Diffusion ◽  
Discrete Element Simulations

This paper presents discrete element simulations of granular flow in a rectangular hopper model of the pebble bed reactor (PBR). Two flow conditions with/without granular materials recycled back are considered in this work. For both flows, the simulations have been conducted under comparable conditions so that the similarity and difference between them can be examined. The distributions of the physical properties including flow patterns, velocity and flow structure are also investigated. Moreover, the mean velocity, diffusion and particle mixing, the effects of wall friction have been analyzed based on the simulation results. The implications for the reactor design and fundamental research on granular flow physics are discussed as well.

Effect of Bed Depth on Granular Flow and Homogenization in a Vertical Bladed Mixer via Discrete Element Method

2015 ◽  
Vol 38 (7) ◽  
pp. 1195-1202 ◽  
Author(s):  
Tomas Barczi ◽  
Tereza Travnickova ◽  
Jaromir Havlica ◽  
Martin Kohout
Keyword(s):  
Discrete Element Method ◽  
Granular Flow ◽  
Discrete Element ◽  
Element Method

Predicting the drag coefficient of a granular flow using the discrete element method

2009 ◽  
Vol 2009 (06) ◽  
pp. P06012 ◽  
Author(s):  
Lionel Favier ◽  
Dominique Daudon ◽  
Frédéric-Victor Donzé ◽  
Jacky Mazars
Keyword(s):  
Discrete Element Method ◽  
Drag Coefficient ◽  
Granular Flow ◽  
Discrete Element ◽  
Element Method
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