A Conservative Coupled Flow/Transport Model with Zero Mass Error

2009 ◽  
Vol 21 (2) ◽  
pp. 166-175 ◽  
Author(s):  
Lu-hai Bai ◽  
Sheng Jin
Keyword(s):  
Transport Model ◽  
Coupled Flow ◽  
Mass Error ◽  
Zero Mass ◽  
Flow Transport

A Finite Element Computer Model for the Application of Electrokinetics to Contaminated Land

2003 ◽  
Author(s):  
Simon Kwong ◽  
Alan Paulley ◽  
Alex Bond
Keyword(s):  
Finite Element ◽  
Chemical Speciation ◽  
Three Dimensional ◽  
Computer Code ◽  
Test Cases ◽  
Coupled Flow ◽  
Lagrangian Transport ◽  
Chemical Gradients ◽  
Flow Transport ◽  
Element Approach

The computer code TRAFFIC incorporating three-dimensional (3-D) electrokinetic capabilities, coupled flow, transport and chemical speciation, using a finite element approach has been used to replicate published laboratory scale experiments [1, 2]. Two test cases have been presented using TRAFFIC with chemical speciation options and the Euler-Lagrangian transport formulation. The first of these (Case A with graphite anode) provided useful insights into the capabilities of the code to simulate realistic and complex problems, while the second (Case B with iron anode) closely reproduced the experimental results. It was also shown that the Euler-Lagrangian transport scheme was much better in coping with the steep chemical gradients, whereas the standard Euler scheme is less stable. Given the good results of these test cases, it is concluded that the code has been verified and partially validated.

scholarly journals Heat Flow Transport Model by Gauss-Seidel Type Iteration Methods for Gas and Solid Materials

2021 ◽  
Vol 18 (1) ◽  
pp. 56
Author(s):  
Nurlaela Rauf ◽  
Heryanto Haeruddin ◽  
Roni Rahmat ◽  
Dahlang Tahir
Keyword(s):  
Heat Flow ◽  
Thermal Conductivity Coefficient ◽  
Transport Model ◽  
Solid Materials ◽  
K Value ◽  
High K ◽  
Flow Transport ◽  
Essential Parameter ◽  
Iteration Methods ◽  
Modification Of Materials

Technological processes for modification of materials, deposition, and prevented fumes in the pyrolysis processes are used gases materials in the medium with vacuum pressure or atmospheric air pressure. Therefore, it is essential to understand heat flow transport for designing an efficient reactor or find the substrate's excellent position in the reactor or furnace for growing materials. We evaluated the energy transfer phenomena in the form of temperature distribution and heat flow for various heating sources for the gases and solid materials by Gauss-Seidel equation. The thermal conductivity coefficient (k), number of heating sources, and position of heating sources show an essential parameter for transmitting the distribution of the heat. For high k value shows efficiently for heat transfer at low temperature due to the atom's position close each other. The heat also affects to the phonon and lattice vibration like a wave which  successfully shows these phenomena in this study.

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