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Wyświetlanie 1-12 z 12
Tytuł:
Computational approach to solving a layered behaviour differential equation with large delay using quadrature scheme
Autorzy:
Pandi, A.
Mudavath, Lalu
Kolloju, Phaneendra
Powiązania:
https://bibliotekanauki.pl/articles/27312398.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
równanie różniczkowe
kwadratura Gaussa
struktura warstwy
Opis:
This paper deals with the computational approach to solving the singularly perturbed differential equation with a large delay in the differentiated term using the two-point Gaussian quadrature. If the delay is bigger than the perturbed parameter, the layer behaviour of the solution is destroyed, and the solution becomes oscillatory. With the help of a special type mesh, a numerical scheme consisting of a fitting parameter is developed to minimize the error and to control the layer structure in the solution. The scheme is studied for convergence. Compared with other methods in the literature, the maximum defects in the approach are tabularized to validate the competency of the numerical approach. In the suggested technique, we additionally focused on the effect of a large delay on the layer structure or oscillatory behaviour of the solutions using a special form of mesh with and without a fitting parameter. The effect of the fitting parameter is demonstrated in graphs to show its impact on the layer of the solution.
Źródło:
International Journal of Applied Mechanics and Engineering; 2022, 27, 4; 117--137
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Propagation of SH waves in an regular non homogeneous monoclinic crustal layer lying over a non-homogeneous semi-infinite medium
Autorzy:
Sethi, M.
Sharma, A.
Powiązania:
https://bibliotekanauki.pl/articles/265788.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
równania różniczkowe
prędkość fali sprężystej
sejsmologia
SH waves
monoclinic
non homogeneity
differential equations
Opis:
The present paper discusses the dispersion equation for SH waves in a non-homogeneous monoclinic layer over a semi infinite isotropic medium. The wave velocity equation has been obtained. In the isotropic case, when non-homogeneity is absent, the dispersion equation reduces to the standard SH wave equation. The dispersion curves are depicted by means of graphs for different values of non-homogeneity parameters for the layer and semi-infinite medium.
Źródło:
International Journal of Applied Mechanics and Engineering; 2016, 21, 2; 447-459
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Three dimensional flow and mass transfer analysis of a second grade fluid in a porous channel with a lower stretching wall
Autorzy:
Khan, N. A.
Naz, F.
Powiązania:
https://bibliotekanauki.pl/articles/265824.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
równania różniczkowe
płyn lepki
pole przepływu
second grade fluid
stretching wall
suction
injection
Opis:
This investigation analyses a three dimensional flow and mass transfer of a second grade fluid over a porous stretching wall in the presence of suction or injection. The equations governing the flow are attained in terms of partial differential equations. A similarity transformation has been utilized for the transformation of partial differential equations into the ordinary differential equations. The solutions of the nonlinear systems are given by the homotopy analysis method (HAM). A comparative study with the previous results of a viscous fluid has been made. The convergence of the series solution has also been considered explicitly. The influence of admissible parameters on the flows is delineated through graphs and appropriate results are presented. In addition, it is found that instantaneous suction and injection reduce viscous drag on the stretching sheet. It is also shown that suction or injection of a fluid through the surface is an example of mass transfer and it can change the flow field.
Źródło:
International Journal of Applied Mechanics and Engineering; 2016, 21, 2; 359-376
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of differential games in mechatronic control system
Autorzy:
Hendzel, Z.
Penar, P.
Powiązania:
https://bibliotekanauki.pl/articles/264495.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
gry różniczkowe
optymalna kontrola
programowanie dynamiczne
differential games
optimal control
approximate dynamic programming
Opis:
Differential games are a combination of game theory and optimum control methods. Their solutions are based on Bellman's principle of optimality. In this paper, the zero-sum differential game theory has been used for the purposes of controlling a mechatronic object: a single-link manipulator. In this case, analytical solutions are unavailable, thus approximate solutions were used. Two approximation methods were compared with the use of numerical simulations and selected quality indicators. The results confirm previous assumptions and the connection between the differential game theory and H∞ control problems.
Źródło:
International Journal of Applied Mechanics and Engineering; 2016, 21, 4; 867-878
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Difference scheme for differential-difference problems with small shifts arising in computational model of neuronal variability
Autorzy:
Kodipaka, Mamatha
Emineni, Siva Prasad
Kolloju, Phaneendra
Powiązania:
https://bibliotekanauki.pl/articles/2174179.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
siatka niejednorodna
równanie różniczkowe
warstwa brzegowa
non-uniform grid
differential-difference equations
boundary layer
Opis:
The solution of differential-difference equations with small shifts having layer behaviour is the subject of this study. A difference scheme is proposed to solve this equation using a non-uniform grid. With the non-uniform grid, finite - difference estimates are derived for the first and second-order derivatives. Using these approximations, the given equation is discretized. The discretized equation is solved using the tridiagonal system algorithm. Convergence of the scheme is examined. Various numerical simulations are presented to demonstrate the validity of the scheme. In contrast to other techniques, maximum errors in the solution are organized to support the method. The layer behaviour in the solutions of the examples is depicted in graphs.
Źródło:
International Journal of Applied Mechanics and Engineering; 2022, 27, 1; 91--106
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analytical solution to the MHD flow of micropolar fluid over a linear stretching sheet
Autorzy:
Siddheshwar, P. G.
Powiązania:
https://bibliotekanauki.pl/articles/265502.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
differential equation
stretching sheet
MHD
micropolar fluid
linear stretching sheet
równania różniczkowe
magnetohydrodynamika
blacha
Opis:
The flow due to a linear tretching sheet in a fluid with suspended particles, modeled as a micropolar fluid, is considered. All reported works on the problem use numerical methods of solution or a regular perturbation technique. An analytical solution is presented in the paper for the coupled non-linear differential equations with inhomogeneous boundary conditions.
Źródło:
International Journal of Applied Mechanics and Engineering; 2015, 20, 2; 397-406
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new analytical procedure for solving the non-linear differential equation arising in the stretching sheet problem
Autorzy:
Siddheshwar, P. G.
Mahabaleswar, U. S.
Andersson, H. I.
Powiązania:
https://bibliotekanauki.pl/articles/266146.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
równania różniczkowe
ciecz Newtona
rozciąganie arkusza
differential equations
Clairaut equation
Newtonian liquid
stretching sheet
suction/injection
Opis:
The paper discusses a new analytical procedure for solving the non-linear boundary layer equation arising in a linear stretching sheet problem involving a Newtonian/non-Newtonian liquid. On using a technique akin to perturbation the problem gives rise to a system of non-linear governing differential equations that are solved exactly. An analytical expression is obtained for the stream function and velocity as a function of the stretching parameters. The Clairaut equation is obtained on consideration of consistency and its solution is shown to be that of the stretching sheet boundary layer equation. The present study throws light on the analytical solution of a class of boundary layer equations arising in the stretching sheet problem.
Źródło:
International Journal of Applied Mechanics and Engineering; 2013, 18, 3; 955-964
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exact solutions for the incompressible electrically conducting viscous flow between two moving parallel disks in unsteady magneto hydrodynamic and stability analysis
Autorzy:
Balagondar, P. M.
Kempe Gowda, M.
Powiązania:
https://bibliotekanauki.pl/articles/264517.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
lepkosprężystość
hydromagnetyka
analiza stabilności
równanie różniczkowe
viscous flows
magnetohydrodynamic
stability analysis
Riabouchinsky flow
Hermite’s differential equation
Opis:
The main interest of the present investigation is to generate exact solutions to the steady Navier-Stokes equations for the incompressible Newtonian viscous electrically conducting fluid flow motion and stability due to disks moving towards each other or in opposite directions with a constant velocity. Making use of the analytic solution, the description of possible conditions of motion is based on the exact solutions of the Navier-Stokes equations. Both stationary and transient cases have been considered. The stability of motion is analyzed for different initial perturbations. Different types of stability were found according to whether the disks moved towards or away from each other.
Źródło:
International Journal of Applied Mechanics and Engineering; 2013, 18, 2; 571-579
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mass transfer effects on an unsteady MHD free convective flow of an incompressible viscous dissipative fluid past an infinite vertical porous plate
Autorzy:
Reddy, B. P.
Powiązania:
https://bibliotekanauki.pl/articles/264683.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
przepływ konwekcyjny
magnetohydrodynamika
równanie różniczkowe
free convection flow
MHD
non-linear system
partial differential equation
Ritz FEM
Opis:
In this paper, a numerical solution of mass transfer effects on an unsteady free convection flow of an incompressible electrically conducting viscous dissipative fluid past an infinite vertical porous plate under the influence of a uniform magnetic field considered normal to the plate has been obtained. The non-dimensional governing equations for this investigation are solved numerically by using the Ritz finite element method. The effects of flow parameters on the velocity, temperature and concentration fields are presented through the graphs and numerical data for the skin-friction, Nusselt and Sherwood numbers are presented in tables and then discussed.
Źródło:
International Journal of Applied Mechanics and Engineering; 2016, 21, 1; 143-155
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analytical solution of the time fractional Fokker-Planck equation
Autorzy:
Sutradhar, T.
Datta, B. K.
Bera, R. K.
Powiązania:
https://bibliotekanauki.pl/articles/955129.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
równanie Fokkera-Plancka
równania różniczkowe
mechanika stosowana
Fokker-Planck equation
Adomian decomposition method
fractional calculus
fractional differential equation
Opis:
A nonperturbative approximate analytic solution is derived for the time fractional Fokker-Planck (F-P) equation by using Adomian’s Decomposition Method (ADM). The solution is expressed in terms of Mittag-Leffler function. The present method performs extremely well in terms of accuracy, efficiency and simplicity.
Źródło:
International Journal of Applied Mechanics and Engineering; 2014, 19, 2; 435-440
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Eigen value approach to generalized thermoelastic interactions in an unbounded body with circular cylindrical cavity without energy dissipation
Autorzy:
Chakraborty, S.
Powiązania:
https://bibliotekanauki.pl/articles/264348.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
eigen value approach
generalized thermoelasticity
Laplace transform
vector-matrix differential equation
termoelastyczność
transformata Laplace'a
równanie różniczkowe
macierze
Opis:
The theory of generalized thermoelasticity in the context of the Green-Naghdi model -II (thermoelasticity without energy dissipation) is studied for an infinite circular cylindrical cavity subjected to two different cases of thermoelastic interactions when the radial stress is zero for (a) maintaining constant temperature and (b) temperature is varying exponentially with time. The Laplace transform from time variable is used to the governing equations to formulate a vector matrix differential equation which is then solved by the eigen value approach. Numerical computations for the displacement component, temperature distribution and components of thermal stress have been made and presented graphically.
Źródło:
International Journal of Applied Mechanics and Engineering; 2017, 22, 4; 811-825
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A review: differential transform method for semi-analytical solution of differential equations
Autorzy:
Rashidi, M. M.
Rabiei, F.
Naser Nia, S.
Abbasbandy, S.
Powiązania:
https://bibliotekanauki.pl/articles/265637.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
metoda transformacji różniczkowej
równania różniczkowe
metoda półanalityczna
differential transform method
differential transform - Pad'e approximation
semi-analytical method
differential equations
fuzzy differential transformation method
gS-differentiability
Opis:
In this article, the semi-analytical method known as the Differential Transform Method (DTM) for solving different types of differential equations is reviewed. First, basic definitions and formulas of DTM and Differential Transform-Padé approximation (DTM-Padé), which are used to increase the convergence and accuracy of DTM approximations, are discussed. Then both techniques of DTM and DTM-Padé, which have been successfully applied to partial differential equations, as well as the application of these methods in fluid mechanic and heat transfer are presented. In addition, the extension of DTM for integral differential equations and the fuzzy differential transformation method (FDTM) for fuzzy problems are discussed.
Źródło:
International Journal of Applied Mechanics and Engineering; 2020, 25, 2; 122-129
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-12 z 12

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