Exponential solubility classes in a problem for the heat equation with a non-local condition for the time averages

2005 ◽  
Vol 196 (9) ◽  
pp. 1319-1348 ◽  
Author(s):  
A Yu Popov ◽  
I V Tikhonov
2017 ◽  
Vol 1 (1) ◽  
pp. 01-10
Author(s):  
M. Aziz ◽  
M. A. Rehman

In this paper, heat equation in two dimensions with non local boundary condition is solved numerically by 2nd order parallel splitting technique. This technique used to approximate spatial derivative and a matrix exponential function is replaced by a rational approximation. Simpson’s 1/3 rule is also used to approximate the non local boundary condition. The results of numerical experiments are checked and compared with the exact solution, as well as with the results already existed in the literature and found to be highly accurate.


Author(s):  
М.М. Сагдуллаева

В работе рассмотрена нелокальная задача с интегральным условием для нагруженного уравнения теплопроводности, где нагруженное слагаемое представляет собой производную второго порядка от неизвестной функции в начале координат. Доказано существование и единственность регулярного решения. С помощью функции Грина и тепловых потенциалов доказанао существование регулярного решения исследуемой задачи. Доказательство основано на редукции поставленной задачи к интегральному уравнению Вольтерра второго рода со слабой особенностью. Из разрешимости полученных интегральных уравнений Вольтерра следует существование единственного решения поставленной задачи. In this paper, we consider a non-local problem with the integral condition for the loaded heat equation, where the loaded term is a derivative of the second order from an unknown function at the origin. The existence and uniqueness of a regular solution is proven. Using the Green’s functions and thermal potentials, the existence of a regular solution to this problem is proved. The proof is based on the reduction of the formulated problem to the second kind Volterra integral equation with a weak singularity. The solvability of the obtained Volterra integral equations implies the existence of a unique solution to the problem.


2017 ◽  
Vol 21 (2) ◽  
pp. 819-826 ◽  
Author(s):  
Derya Avci ◽  
Eroglu Iskender ◽  
Necati Ozdemir

The conformable heat equation is defined in terms of a local and limit-based definition called conformable derivative which provides some basic properties of integer order derivative such that conventional fractional derivatives lose some of them due to their non-local structures. In this paper, we aim to find the fundamental solution of a conformable heat equation acting on a radial symmetric plate. Moreover, we give a comparison between the new conformable and the existing Grunwald-Letnikov solutions of heat equation. The computational results show that conformable formulation is quite successful to show the sub-behaviors of heat process. In addition, conformable solution can be obtained by a analytical method without the need of a numerical scheme and any restrictions on the problem formulation. This is surely a significant advantageous compared to the Grunwald-Letnikov solution.


Filomat ◽  
2012 ◽  
Vol 26 (2) ◽  
pp. 289-303 ◽  
Author(s):  
Huy Tuan ◽  
Duc Trong ◽  
Hoang Quan

In this paper, a non-local boundary value problem method for solving 2-D nonlinear heat equation backward in time is given. Some error estimates between the exact solution and its regularization approximation are provided and numerical examples show that the method works effectively.


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