scholarly journals Shape Reconstruction for Unsteady Advection-Diffusion Problems by Domain Derivative Method

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Wenjing Yan ◽  
Jian Su ◽  
Feifei Jing

This paper is concerned with the numerical simulation for shape reconstruction of the unsteady advection-diffusion problems. The continuous dependence of the solution on variations of the boundary is established, and the explicit representation of domain derivative of corresponding equations is derived. This allows the investigation of iterative method for the ill-posed problem. By the parametric method, a regularized Gauss-Newton scheme is employed to the shape inverse problem. Numerical examples indicate that the proposed algorithm is feasible and effective for the practical purpose.

CFD letters ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 58-65
Author(s):  
Hazim Fadli Aminnuddin ◽  
Farzad Ismail ◽  
Akmal Nizam Mohamed ◽  
Kamil Abdullah

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Heng Cheng ◽  
Guodong Zheng

In this paper, the improved element-free Galerkin (IEFG) method is used for solving 3D advection-diffusion problems. The improved moving least-squares (IMLS) approximation is used to form the trial function, the penalty method is applied to introduce the essential boundary conditions, the Galerkin weak form and the difference method are used to obtain the final discretized equations, and then the formulae of the IEFG method for 3D advection-diffusion problems are presented. The error and the convergence are analyzed by numerical examples, and the numerical results show that the IEFG method not only has a higher computational speed but also can avoid singular matrix of the element-free Galerkin (EFG) method.


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