Numerical Study of the Interaction of Fast Chemistry and Diffusion

AIAA Journal ◽  
1979 ◽  
Vol 17 (6) ◽  
pp. 606-613 ◽  
Author(s):  
G. R. Otey ◽  
H. A. Dwyer
Keyword(s):  
Numerical Study ◽  
Fast Chemistry ◽  
And Diffusion

Numerical Analysis of Heated Soil Vapor Extraction System

2002 ◽  
Author(s):  
R. S. Jadhav ◽  
R. S. Amano ◽  
J. Jatkar ◽  
R. J. Lind
Keyword(s):  
High Temperature ◽  
Organic Compounds ◽  
Environmental Science ◽  
Numerical Study ◽  
Soil Vapor Extraction ◽  
Vapor Extraction ◽  
Element Analysis ◽  
Volatile Organic ◽  
Heated Soil ◽  
And Diffusion

An innovative and highly effective technique for remediation of soil has been developed—Heated Soil Vapor Extraction (HSVE), which is one of essential technologies that quickly and effectively remediates soil that is contaminated with organic compounds. The system efficiently uses the principles of heat transfer and diffusion to eliminate organic compounds from the soil. It basically consists of a high temperature heat source and a sink to take away the vaporized compounds in the presence of high temperature in the soil. A numerical study has been conducted to further strengthen the fact that the system is very effective, by actually modeling soil with system. Finite Element Analysis software ANSYS® has been used for the purpose of analysis. Such analysis will help environmental science and give new dimensions to soil remediation processes to clean soil off volatile organic compounds so that they can be carried out quickly, efficiently and economically.

scholarly journals Simulating of the admixture spreading in a steady 2D lengthy stream of the viscous fluid

2013 ◽  
Vol 2 (1) ◽  
pp. 91-97
Keyword(s):  
Viscous Fluid ◽  
Small Parameter ◽  
Stokes Equations ◽  
Numerical Study ◽  
Computer Experiments ◽  
Navier Stokes ◽  
Navier Stokes Equations ◽  
Convection Diffusion ◽  
Proposed Model ◽  
And Diffusion

The problem of the passive contaminant spreading in a steady viscous fluid stream is discussed while the admixture's dissipation and diffusion are taken into account. The channel is assumed to be a horizontal plane, curvilinear and quite lengthy, so that the ratio of the stream width to its length can be regarded as a small parameter. A mathematical model of the process derived by the small parameter technique from the 2D steady Navier-Stokes equations for incompressible viscous fluid and non-steady convection-diffusion equation of a substance in the moving medium is introduced. A finite element method is applied for numerical study of the proposed model and results of computer experiments are presented.

717 Numerical Study on Structures of Turbulence and Diffusion

2006 ◽  
Vol 2006.55 (0) ◽  
pp. 297-298
Author(s):  
Yasuhiko Sakai ◽  
Haruka Kuwahara ◽  
Takashi Kubo ◽  
Koji Nagata ◽  
Hiroyuki Tsunoda
Keyword(s):  
Numerical Study ◽  
And Diffusion ◽  
Turbulence And Diffusion

Numerical Study of Natural Convection and Diffusion in Fractured Porous Media

SPE Journal ◽  
2000 ◽  
Vol 5 (01) ◽  
pp. 12-20 ◽  
Author(s):  
Kassem Ghorayeb ◽  
Abbas Firoozabadi
Keyword(s):  
Porous Media ◽  
Natural Convection ◽  
Numerical Study ◽  
Fractured Porous Media ◽  
And Diffusion

scholarly journals Numerical Study Process Distribution of Contaminated Substances in the Atmosphere Taking Into Account the Physical and Mechanical Properties of Particles

2021 ◽  
pp. 10-15
Keyword(s):  
Numerical Study ◽  
Physical And Mechanical Properties ◽  
Software Tool ◽  
Industrial Emissions ◽  
Factors Affecting ◽  
Implicit Finite Difference Scheme ◽  
Implicit Finite Difference ◽  
Harmful Substances ◽  
Study Process ◽  
And Diffusion

The article deals with the numerical modeling of the processes of transfer and diffusion of air pollutants in the boundary layer of the atmosphere. A mathematical model of the spread of industrial emissions in the atmosphere was developed, taking into account the motion velocity of finely dispersed substances and a number of other factors affecting the change in the concentration of harmful substances in the atmosphere. The model is described by multidimensional partial differential equations with corresponding initial and boundary conditions. For the numerical integration of the problem, the method of splitting into physical processes (of transfer, diffusion and absorption) and an implicit finite-difference scheme of the second order of approximation in spatial variables and in time were used. A software tool was developed to conduct a computational experiment on a computer and to perform a comprehensive study of the processes of transfer and diffusion of harmful substances in the atmosphere

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