Numerical modeling of bubble dynamics in liquid metal exposed to electromagnetic fields for hydrogen production

2017 ◽  
Vol 53 ◽  
pp. S111-S120 ◽  
Author(s):  
T. Fehling ◽  
T. Steinberg ◽  
E. Baake
Keyword(s):  
Numerical Modeling ◽  
Hydrogen Production ◽  
Liquid Metal ◽  
Electromagnetic Fields ◽  
Bubble Dynamics

Liquid Metal Shell as an Effective Iron Oxide Modifier for Redox-Based Hydrogen Production at Intermediate Temperatures

ACS Catalysis ◽  
2021 ◽  
pp. 10228-10238
Author(s):  
Iwei Wang ◽  
Yunfei Gao ◽  
Xijun Wang ◽  
Runxia Cai ◽  
Chingchang Chung ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Hydrogen Production ◽  
Liquid Metal ◽  
Metal Shell

Investigation of Fluid Dynamic Properties of Liquid Field’s Metal

2013 ◽  
Author(s):  
Adam Lipchitz ◽  
Theophile Imbert ◽  
Glenn D. Harvel
Keyword(s):  
Numerical Modeling ◽  
Liquid Metal ◽  
Linear Dependence ◽  
Dynamic Properties ◽  
Fluid Dynamic ◽  
Weight Percent ◽  
Rotational Viscometer ◽  
Liquid States ◽  
Increasing Temperature ◽  
Solid And Liquid States

The density and viscosity Field’s metal is measured in this work and compared to traditional liquid metal coolants such as sodium and lead-bismuth eutectic. Field’s metal is a eutectic of the ternary In-Bi-Sn system. The alloy is by weight percent is 51% indium, 32.5% bismuth and 16.5% tin and possesses a melting temperature of 333 K. This work experimentally measures the density and viscosity of Field’s metal for numerical modeling and thermal hydraulic applications. The density of Field’s metal is measured using a pycnometer. The density is determined for both its solid and liquid states. In its liquid state Field’s metal is found to have a linear dependence with respect to increasing temperature. The viscosity of Field’s metal is measured using a rotational viscometer. The viscosity is measured is to be 27 mPa-s at 353 K, however further investigation is required to determine a trend at higher temperatures.

Behavior of Inert Gas Bubbles in Forced Convective Liquid Metal Circuits

1976 ◽  
Vol 98 (1) ◽  
pp. 5-11 ◽  
Author(s):  
W. J. Minkowycz ◽  
D. M. France ◽  
R. M. Singer
Keyword(s):  
Liquid Metal ◽  
Bubble Dynamics ◽  
Bubble Radius ◽  
Gas Bubbles ◽  
Inert Gas ◽  
Liquid Sodium ◽  
Gas Bubble ◽  
Flowing Liquid ◽  
Argon Gas ◽  
The Core

Conservation equations are derived for the motion of a small inert gas bubble in a large flowing liquid-gas solution subjected to large thermal gradients. Terms which are of the second order of magnitude under less severe and steady-state conditions are retained, thus resulting in an expanded form of the Rayleigh equation. The bubble dynamics is a function of opposing mechanisms tending to increase or decrease bubble volume while being transported with the solution. Diffusion of inert gas between the bubble and the solution is one of the most important of these mechanisms included in the analysis. The analytical model is applied to an argon gas bubble flowing in a weak solution of argon gas in liquid sodium. Calculations are performed for these fluids under conditions typical of normal and abnormal operation of a liquid metal fast breeder reactor (LMFBR) core and the resulting bubble radius, internal gas pressure, and mass of inert gas are presented in each case. An important result obtained indicates that inert gas bubbles reaching the core inlet of an LMFBR will always grow as they traverse the core under normal and extreme abnormal conditions and that the rate of growth is quite small in all cases.

Main Results of Na-K Alloy Boiling Investigation

2002 ◽  
Author(s):  
G. A. Sorokin ◽  
G. P. Bogoslovskaya ◽  
E. F. Ivanov ◽  
A. P. Sorokin
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Numerical Modeling ◽  
Liquid Metal ◽  
Critical Heat Flux ◽  
Liquid Metals ◽  
Operating Conditions ◽  
Coolant Temperature ◽  
Low Velocity ◽  
Experimental Conditions

Boiling experiments on eutectic sodium-potassium alloy in the model of fast reactor subassembly under conditions of low-velocity circulation carried out at the IPPE call for further investigations into numerical modeling of the process. The paper presents analysis of pin bundle liquid metal boiling, stages of the process, its characteristics (wall temperature, coolant temperature, flow rate. pressure void fraction and others), that allowed the pattern map to be drawn. The problem of conversion of the data gained in Na-K mock-up experiments to in-pile sodium reactor operating conditions is analyzed here, as well as thermodynamic similarity of liquid metal coolants and eutectic Na-K alloy. Data on bundle boiling in Na-K are presented in comparison with those in different liquid metals. Analysis of data on liquid metal heat transfer in cases of pool boiling, boiling in tubes, in slots, and in pin bundles, as well as data on critical heat flux in tubes was performed and discussed in the paper. The relationship for calculation of critical heat flux in liquid metal derived by the authors is presented. Results of numerical modeling of liquid metal boiling heat transfer during accident cooling of reactor core applied to experimental conditions of going from forced to natural circulation are presented, too.

Numerical modeling of compact high temperature heat exchanger and chemical decomposer for hydrogen production

2008 ◽  
Vol 44 (11) ◽  
pp. 1379-1389 ◽  
Author(s):  
Valery Ponyavin ◽  
Yitung Chen ◽  
Anthony E. Hechanova ◽  
Merrill Wilson
Keyword(s):  
Numerical Modeling ◽  
High Temperature ◽  
Heat Exchanger ◽  
Hydrogen Production ◽  
Temperature Heat

Numerical Modeling of Inclusion Behavior in Liquid Metal Processing

JOM ◽  
2013 ◽  
Vol 65 (9) ◽  
pp. 1164-1172 ◽  
Author(s):  
Jean-Pierre Bellot ◽  
Vincent Descotes ◽  
Alain Jardy
Keyword(s):  
Numerical Modeling ◽  
Liquid Metal ◽  
Metal Processing ◽  
Liquid Metal Processing

scholarly journals Hydrogen production via methane pyrolysis in a liquid metal bubble column reactor with a packed bed

2016 ◽  
Vol 299 ◽  
pp. 192-200 ◽  
Author(s):  
T. Geißler ◽  
A. Abánades ◽  
A. Heinzel ◽  
K. Mehravaran ◽  
G. Müller ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Liquid Metal ◽  
Bubble Column ◽  
Packed Bed ◽  
Bubble Column Reactor ◽  
Column Reactor ◽  
Methane Pyrolysis
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