scholarly journals Numerical simulations of heat and mass transfer in the MOVPE process for obtaining high-quality nitride-based semiconductors

2015 ◽  
Author(s):  
J. Skibinski
Keyword(s):  
Mass Transfer ◽  
Numerical Simulations ◽  
Heat And Mass Transfer ◽  
High Quality

scholarly journals Heat and Mass Transfer during Hydrogen Generation in an Array of Fuel Bars of a BWR Using a Periodic Unit Cell

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
H. Romero-Paredes ◽  
F. J. Valdés-Parada ◽  
G. Espinosa-Paredes
Keyword(s):  
Mass Transfer ◽  
Numerical Analysis ◽  
Fuel Element ◽  
Numerical Simulations ◽  
Heat And Mass Transfer ◽  
Nuclear Reactor ◽  
Hydrogen Generation ◽  
Unit Cell ◽  
Concentration Profiles ◽  
Periodic Unit Cell

This paper presents, the numerical analysis of heat and mass transfer during hydrogen generation in an array of fuel cylinder bars, each coated with a cladding and a steam current flowing outside the cylinders. The analysis considers the fuel element without mitigation effects. The system consists of a representative periodic unit cell where the initial and boundary-value problems for heat and mass transfer were solved. In this unit cell, we considered that a fuel element is coated by a cladding with steam surrounding it as a coolant. The numerical simulations allow describing the evolution of the temperature and concentration profiles inside the nuclear reactor and could be used as a basis for hybrid upscaling simulations.

scholarly journals Numerical simulations of heat and mass transfer at ablating surface in hypersonic flow

2015 ◽  
Vol 653 ◽  
pp. 012118 ◽  
Author(s):  
A N Bocharov ◽  
N N Golovin ◽  
V P Petrovskiy ◽  
I O Teplyakov
Keyword(s):  
Mass Transfer ◽  
Numerical Simulations ◽  
Heat And Mass Transfer ◽  
Hypersonic Flow

Numerical simulations of fin and tube air cooler and heat and mass transfer in cold storage

2018 ◽  
Vol 18 (5) ◽  
pp. 325 ◽  
Author(s):  
Kamil �š ◽  
N.A. mierciew ◽  
Mirosława Kołodziejczyk ◽  
Jerzy Gagan ◽  
Dariusz Józef Butrymowicz
Keyword(s):  
Mass Transfer ◽  
Numerical Simulations ◽  
Heat And Mass Transfer ◽  
Cold Storage ◽  
Air Cooler

Numerical simulations of fin and tube air cooler and heat and mass transfer in cold storage

2017 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Dariusz Jozef Butrymowicz ◽  
Jerzy Gagan ◽  
Miroslawa Kolodziejczyk ◽  
Kamil Smierciew
Keyword(s):  
Mass Transfer ◽  
Numerical Simulations ◽  
Heat And Mass Transfer ◽  
Cold Storage ◽  
Air Cooler

Multiscale CFD of the Flow, Heat and Mass Transfer Through a Porous Material With Application to Protective Garments

2004 ◽  
Author(s):  
M. P. Sobera ◽  
C. R. Kleijn ◽  
P. Brasser ◽  
H. E. A. van den Akker
Keyword(s):  
Mass Transfer ◽  
Numerical Simulations ◽  
Heat And Mass Transfer ◽  
Simple Relation ◽  
Direct Numerical Simulations ◽  
Stream Velocity ◽  
Velocity Magnitude ◽  
Porosity And Permeability ◽  
Flow Heat ◽  
Fabric Materials

A multi-scale study of the performance of protective clothing has been performed by coupling various types of numerical simulation of flow, heat and mass transfer. At first, a detailed study of the turbulent flow at Re = 3900 around a circular cylinder, sheathed at some small distance by a porous layer, has been performed by means of Direct Numerical Simulations with a commercial unstructured finite volume based Computational Fluid Dynamics solver. This geometry is widely used in experiments to study the performance of fabric materials. From this DNS study, it was found that the flow underneath the clothing is laminar and periodic, with a velocity magnitude much smaller than the free stream velocity. Micro-scale Direct Numerical Simulations of the flow through the textile at the scale of individual fibres revealed a simple relation between textile porosity and permeability. A good agreement was found between flow and heat transfer predictions of Direct Numerical Simulations and from Reynolds Averaged simulations. From the latter, an engineering correlation for heat and mass transfer was deduced.

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