Numerical solution of the oxygen diffusion in absorbing tissue with a moving boundary

2006 ◽  
Vol 22 (9) ◽  
pp. 933-942 ◽  
Author(s):  
Abdellatif Boureghda
Keyword(s):  
Numerical Solution ◽  
Oxygen Diffusion ◽  
Moving Boundary

Axisymmetric flow near the critical point on the moving boundary

2010 ◽  
Vol 7 ◽  
pp. 182-190
Author(s):  
I.Sh. Nasibullayev ◽  
E.Sh. Nasibullaeva
Keyword(s):  
Fluid Flow ◽  
Finite Difference ◽  
Boundary Conditions ◽  
Numerical Solution ◽  
Axial Velocity ◽  
Moving Boundary ◽  
Axisymmetric Flow ◽  
Boundary Motion ◽  
Newton Raphson ◽  
Raphson Method

In this paper the investigation of the axisymmetric flow of a liquid with a boundary perpendicular to the flow is considered. Analytical equations are derived for the radial and axial velocity and pressure components of fluid flow in a pipe of finite length with a movable right boundary, and boundary conditions on the moving boundary are also defined. A numerical solution of the problem on a finite-difference grid by the iterative Newton-Raphson method for various velocities of the boundary motion is obtained.

scholarly journals The New Approximate Analytic Solution for Oxygen Diffusion Problem with Time-Fractional Derivative

2016 ◽  
Vol 2016 ◽  
pp. 1-7
Author(s):  
Vildan Gülkaç
Keyword(s):  
Oxygen Diffusion ◽  
Moving Boundary ◽  
Essential Feature ◽  
Power Series Expansion ◽  
Approximate Solutions ◽  
Convergent Series ◽  
Diffusion Problem ◽  
Approximate Analytic Solution ◽  
Stable Case ◽  
Modified Method

Oxygen diffusion into the cells with simultaneous absorption is an important problem and it is of great importance in medical applications. The problem is mathematically formulated in two different stages. At the first stage, the stable case having no oxygen transition in the isolated cell is investigated, whereas at the second stage the moving boundary problem of oxygen absorbed by the tissues in the cell is investigated. In oxygen diffusion problem, a moving boundary is essential feature of the problem. This paper extends a homotopy perturbation method with time-fractional derivatives to obtain solution for oxygen diffusion problem. The method used in dealing with the solution is considered as a power series expansion that rapidly converges to the nonlinear problem. The new approximate analytical process is based on two-iterative levels. The modified method allows approximate solutions in the form of convergent series with simply computable components.

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