Heat and mass transfer to a reacting particle in a gas flow for arbitrary temperature dependence of the transport coefficients

1984 ◽  
Vol 19 (1) ◽  
pp. 93-101 ◽  
Author(s):  
A. D. Polyanin ◽  
Yu. S. Ryazantsev
Keyword(s):  
Mass Transfer ◽  
Temperature Dependence ◽  
Heat And Mass Transfer ◽  
Gas Flow ◽  
Transport Coefficients ◽  
Arbitrary Temperature

scholarly journals Experimental study of heat and mass transfer coefficients at heat recovery of steam-gas flow in the torch of drops of mechanical nozzle

2015 ◽  
Vol 6 (8(78)) ◽  
pp. 50
Author(s):  
Артур Юрьевич Рачинский ◽  
Михаил Константинович Безродный ◽  
Николай Никифорович Голияд ◽  
Петр Алексеевич Барабаш
Keyword(s):  
Mass Transfer ◽  
Experimental Study ◽  
Heat And Mass Transfer ◽  
Heat Recovery ◽  
Gas Flow ◽  
Transfer Coefficients ◽  
Mass Transfer Coefficients

scholarly journals Theoretical Study on Gas Flow and Heat and Mass Transfer in a Converter

1989 ◽  
Vol 75 (3) ◽  
pp. 478-485 ◽  
Author(s):  
Yoshiei KATO ◽  
Jean-Claude GROSJEAN ◽  
Jean-Pierre REBOUL ◽  
Paul RIBOUD
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Gas Flow ◽  
Theoretical Study

scholarly journals Research on heat and mass transfer characteristics of flue gas flow drying biomass particles

2017 ◽  
Vol 205 ◽  
pp. 3898-3902 ◽  
Author(s):  
Yongzhang Cui ◽  
Guokai Zhang ◽  
Wei Liu ◽  
Zhen Li ◽  
Nan Jiang
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Flue Gas ◽  
Gas Flow ◽  
Transfer Characteristics ◽  
Biomass Particles

scholarly journals Numerical modeling of disperse material evaporation in axisymmetric thermal plasma reactor

2003 ◽  
Vol 7 (1) ◽  
pp. 63-99 ◽  
Author(s):  
Predrag Stefanovic ◽  
Dejan Cvetinovic ◽  
Goran Zivkovic ◽  
Simeon Oka ◽  
Pavle Pavlovic
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Thermal Plasma ◽  
Gas Flow ◽  
Disperse Material ◽  
Plasma Reactor ◽  
Solid Particles ◽  
Reactor Wall ◽  
Particle Injection ◽  
Injection Angle

A numerical 3D Euler-Lagrangian stochastic-deterministic (LSD) model of two-phase flow laden with solid particles was developed. The model includes the relevant physical effects, namely phase interaction, panicle dispersion by turbulence, lift forces, particle-particle collisions, particle-wall collisions, heat and mass transfer between phases, melting and evaporation of particles, vapour diffusion in the gas flow. It was applied to simulate the processes in thermal plasma reactors, designed for the production of the ceramic powders. Paper presents results of extensive numerical simulation provided (a) to determine critical mechanism of interphase heat and mass transfer in plasma flows, (b) to show relative influence of some plasma reactor parameters on solid precursor evaporation efficiency: 1 - inlet plasma temperature, 2 - inlet plasma velocity, 3 - particle initial diameter, 4 - particle injection angle a, and 5 - reactor wall temperature, (c) to analyze the possibilities for high evaporation efficiency of different starting solid precursors (Si, Al, Ti, and B2O3 powder), and (d) to compare different plasma reactor configurations in conjunction with disperse material evaporation efficiency.

scholarly journals Pulsed Multiphase Flows—Numerical Investigation of Particle Dynamics in Pulsating Gas–Solid Flows at Elevated Temperatures

Processes ◽  
2020 ◽  
Vol 8 (7) ◽  
pp. 815
Author(s):  
Arne Teiwes ◽  
Maksym Dosta ◽  
Michael Jacob ◽  
Stefan Heinrich
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Multiphase Flows ◽  
Gas Flow ◽  
Elevated Temperatures ◽  
Process Intensification ◽  
Particle Dynamics ◽  
Transport Processes ◽  
Pulse Combustion ◽  
New Processing

Although the benefits of pulsating multiphase flows and the concomitant opportunity to intensify heat and mass transfer processes for, e.g., drying, extraction or chemical reactions have been known for some time, the industrial implementation is still limited. This is particularly due to the lack of understanding of basic influencing factors, such as amplitude and frequency of the pulsating flow and the resulting particle dynamics. The pulsation generates oscillation of velocity, pressure, and temperature, intensifying the heat and mass transfer by a factor of up to five compared to stationary gas flow. With the goal of process intensification and targeted control of sub-processes or even the development of completely new processing routes for the formation, drying or conversion of particulate solids in pulsating gas flows as utilized in, e.g., pulse combustion drying or pulse combustion spray pyrolysis, the basic understanding of occurring transport processes is becoming more and more important. In the presented study, the influence of gas-flow conditions and particle properties on particle dynamics as well as particle residence time and the resulting heat and mass transfer in pulsating gas–solid flows are investigated.

Heat and mass transfer in wood composite panels during hot pressing: Part 3. Predicted variations and interactions of the pressing variables

Holzforschung ◽  
2007 ◽  
Vol 61 (1) ◽  
pp. 74-82 ◽  
Author(s):  
Changming Yu ◽  
Chunping Dai ◽  
Brad Jianhe Wang
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Gas Flow ◽  
Structural Model ◽  
Governing Equations ◽  
Model Predictions ◽  
Temporal And Spatial ◽  
Resin Curing ◽  
Heat Conduction And Convection

Abstract As a continuation of previous publications on a physical-mathematical model of heat and mass transfer and a structural model of mat permeability, this paper presents typical prediction results for 15 pressing variables for strand mats. A case study and complete solutions to the governing equations are provided. The results show how the heat and mass transfer is controlled by heat conduction and convection involving gas flow and phase change. The model predictions provide a comprehensive illustration of the temporal and spatial variations of basic pressing variables, including mat temperature, gas pressure, moisture control and resin curing rate. The model offers a powerful tool for simulating the effects of mat structure, pressing schedule and initial mat conditions.

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