- Tytuł:
- The Nonlinear Diffusion in the Nonisothermical Case
- Autorzy:
- Janavičius, A. J.
- Powiązania:
- https://bibliotekanauki.pl/articles/1968857.pdf
- Data publikacji:
- 1998-02
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
- 66.30.-h
- Opis:
- We will discuss the properties of the nonlinear equation in the nonisothermical case. In our previous papers the diffusion coefficient directly proportional to the concentration of the impurities was proposed and it was exactly defined. Now the nonlinear diffusion equation is solved for the temperature and for the diffusion coefficient depending on time in a special way. The temperature function T(t) has the singularity at the free chosen time moment t$\text{}_{0}$. The obtained analytical solutions define the diffusion profiles for increasing temperatures and in the case of excited systems when the vacancies and the impurity's atoms are not in the thermal equilibrium with lattice. Considering the connection between temperature function and the population of excited states for atoms surrounding vacancies the possibility of the superdiffusion is shown.
- Źródło:
-
Acta Physica Polonica A; 1998, 93, 3; 505-512
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki