Temat: równanie ułamkowe - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Effects of the porous boundary and inclined magnetic field on MHD flow in a rectangular duct
Autorzy:: Chutia, Muhim
Powiązania:: https://bibliotekanauki.pl/articles/1839735.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: MHD
rectangular duct
porous boundary
inclined magnetic field
finite difference method
kanał prostokątny
ułamkowe równanie różniczkowe
pochodna ułamkowa
Opis:: In this work, a steady two dimensional MHD flow of a viscous incompressible fluid through a rectangular duct under the action of an inclined magnetic field with a porous boundary has been investigated. The coupled partial differential equations are transformed into a system of algebraic equations using the finite difference method and are then solved simultaneously using the Gauss Seidal iteration method by programming in Matlab software. Numerical solutions for velocity, induced magnetic field and current density lines are obtained and analyzed for different values of dimensionless parameters namely suction/injection parameter (S), Hartmann number (M) and inclination angle (θ) and are presented graphically.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2020, 19, 4; 33-44
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Effects of the porous boundary and inclined magnetic field on MHD flow in a rectangular duct
Autorzy:: Chutia, Muhim
Powiązania:: https://bibliotekanauki.pl/articles/1839745.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: MHD
rectangular duct
porous boundary
inclined magnetic field
finite difference method
kanał prostokątny
ułamkowe równanie różniczkowe
pochodna ułamkowa
Opis:: In this work, a steady two dimensional MHD flow of a viscous incompressible fluid through a rectangular duct under the action of an inclined magnetic field with a porous boundary has been investigated. The coupled partial differential equations are transformed into a system of algebraic equations using the finite difference method and are then solved simultaneously using the Gauss Seidal iteration method by programming in Matlab software. Numerical solutions for velocity, induced magnetic field and current density lines are obtained and analyzed for different values of dimensionless parameters namely suction/injection parameter (S), Hartmann number (M) and inclination angle (θ) and are presented graphically.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2020, 19, 4; 33-44
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Fractional heat conduction in a rectangular plate with bending moments
Autorzy:: Warbhe, Shrikant
Powiązania:: https://bibliotekanauki.pl/articles/1839729.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: Mittag-Leffler function
integral transform
fractional partial differential equation
fractional derivatives
fractional integrals
ułamkowe równanie różniczkowe cząstkowe
funkcja Mittag-Lefflera
pochodna ułamkowa
naprężenia termiczne
przewodzenia ciepła
transformata całkowa
Opis:: In this research work, we consider a thin, simply supported rectangular plate defined as 0 ≤ x ≤ a, 0 ≤ y ≤ b, 0 ≤ z ≤ c and determine the thermal stresses by using a thermal bending moment with the help of a time dependent fractional derivative. The constant temperature is prescribed on the surface y = 0 and other surfaces are maintained at zero temperature. A powerful technique of integral transform is used to find the analytical solution of initial-boundary value problem of a thin rectangular plate. The numerical result of temperature distribution, thermal deflection and thermal stress component are computed and represented graphically for a copper plate.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2020, 19, 4; 115-126
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Fractional heat conduction in a rectangular plate with bending moments
Autorzy:: Warbhe, Shrikant
Powiązania:: https://bibliotekanauki.pl/articles/1839752.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: Mittag-Leffler function
integral transform
fractional partial differential equation
fractional derivatives
fractional integrals
ułamkowe równanie różniczkowe cząstkowe
funkcja Mittag-Lefflera
pochodna ułamkowa
naprężenia termiczne
przewodzenia ciepła
transformata całkowa
Opis:: In this research work, we consider a thin, simply supported rectangular plate defined as 0 ≤ x ≤ a, 0 ≤ y ≤ b, 0 ≤ z ≤ c and determine the thermal stresses by using a thermal bending moment with the help of a time dependent fractional derivative. The constant temperature is prescribed on the surface y = 0 and other surfaces are maintained at zero temperature. A powerful technique of integral transform is used to find the analytical solution of initial-boundary value problem of a thin rectangular plate. The numerical result of temperature distribution, thermal deflection and thermal stress component are computed and represented graphically for a copper plate.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2020, 19, 4; 115-126
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: The implicit numerical method for the one-dimensional anomalous subdiffusion equation with a nonlinear source term
Autorzy:: Błasik, Marek
Powiązania:: https://bibliotekanauki.pl/articles/2086846.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: fractional derivative
fractional integral
integro-differential equations
numerical method
finite difference method
pochodna ułamkowa
całkowanie ułamkowe
równanie całkowo-różniczkowe
metoda numeryczna
metoda elementów skończonych
Opis:: In the paper, the numerical method of solving the one-dimensional subdiffusion equation with the source term is presented. In the approach used, the key role is played by transforming of the partial differential equation into an equivalent integro-differential equation. As a result of the discretization of the integro-differential equation obtained an implicit numerical scheme which is the generalized Crank-Nicolson method. The implicit numerical schemes based on the finite difference method, such as the Carnk-Nicolson method or the Laasonen method, as a rule are unconditionally stable, which is their undoubted advantage. The discretization of the integro-differential equation is performed in two stages. First, the left-sided Riemann-Liouville integrals are approximated in such a way that the integrands are linear functions between successive grid nodes with respect to the time variable. This allows us to find the discrete values of the integral kernel of the left-sided Riemann-Liouville integral and assign them to the appropriate nodes. In the second step, second order derivative with respect to the spatial variable is approximated by the difference quotient. The obtained numerical scheme is verified on three examples for which closed analytical solutions are known.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 6; e138240, 1--9
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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