Some new exact traveling wave solutions one dimensional modified complex Ginzburg- Landau equation
Mina
Mortazavi
Department of Applied
ferdowsi university of mashhad
mashhad. Iran
author
Mohammad
Mirzazadeh
Depatmant of Mathematics,
University of Guilan
author
text
article
2015
eng
In this paper, we obtain exact solutions involving parameters of some nonlinear PDEs in mathmatical physics; namely the one-dimensional modified complex Ginzburg-Landau equation by using the $ (G'/G) $ expansion method, homogeneous balance method, extended F-expansion method. By using homogeneous balance principle and the extended F-expansion, more periodic wave solutions expressed by jacobi elliptic functions for the 1D MCGL equation are derived. Homogeneous method is a powerful method, it can be used to construct a large families of exact solutions to different nonlinear differential equations that does not involve independent variables.
Computational Methods for Differential Equations
University of Tabriz
2345-3982
3
v.
2
no.
2015
70
86
http://cmde.tabrizu.ac.ir/article_4017_0464648f9f5a70082b84fd3112ca2dcf.pdf
Optimization with the time-dependent Navier-Stokes equations as constraints
Mitra
Vizheh
Department of Mathematics,
Shahed University
author
Syaed Hodjatollah
Momeni-Masuleh
Department of Mathematics,
Shahed University
author
Alaeddin
Malek
Department of Applied Mathematics, Faculty of Mathematical Sciences,
Tarbiat Modares University
author
text
article
2015
eng
In this paper, optimal distributed control of the time-dependent Navier-Stokes equations is considered. The control problem involves the minimization of a measure of the distance between the velocity field and a given target velocity field. A mixed numerical method involving a quasi-Newton algorithm, a novel calculation of the gradients and an inhomogeneous Navier-Stokes solver, to find the optimal control of the Navier-Stokes equations is proposed. Numerical examples are given to demonstrate the efficiency of the method.
Computational Methods for Differential Equations
University of Tabriz
2345-3982
3
v.
2
no.
2015
87
98
http://cmde.tabrizu.ac.ir/article_4484_0de495e641081aae07a2b511ceceb9bf.pdf
Application of the block backward differential formula for numerical solution of Volterra integro-differential equations
Somayyeh
Fazeli
University of Tabriz
author
text
article
2015
eng
In this paper, we consider an implicit block backward differentiation formula (BBDF) for solving Volterra Integro-Differential Equations (VIDEs). The approach given in this paper leads to numerical methods for solving VIDEs which avoid the need for special starting procedures. Convergence order and linear stability properties of the methods are analyzed. Also, methods with extensive stability region of orders 2, 3 and 4 are constructed which are suitable for solving stiff VIDEs.
Computational Methods for Differential Equations
University of Tabriz
2345-3982
3
v.
2
no.
2015
99
100
http://cmde.tabrizu.ac.ir/article_4541_07598b31f5bf268f9053f664f3870864.pdf
Numerical solution of time-dependent foam drainage equation (FDE)
Murat
Gubes
Karamanoglu Mehmetbey University
author
Yildiray
Keskin
Selcuk University
author
Galip
Oturanc
Selcuk University
author
text
article
2015
eng
Reduced Differental Transform Method (RDTM), which is one of the useful and effective numerical method, is applied to solve nonlinear time-dependent Foam Drainage Equation (FDE) with different initial conditions. We compare our method with the famous Adomian Decomposition and Laplace Decomposition Methods. The obtained results demonstrated that RDTM is a powerful tool for solving nonlinear partial differential equations (PDEs), it can be applied very easily and it has less computational work than other existing methods like Adomian decomposition and Laplace decomposition. Additionally, effectiveness and precision of RDTM solutions are shown in tables and graphically.
Computational Methods for Differential Equations
University of Tabriz
2345-3982
3
v.
2
no.
2015
111
122
http://cmde.tabrizu.ac.ir/article_4648_efda79e599c82bb21304dce4c2502549.pdf
Existence and uniqueness of positive and nondecreasing solution for nonlocal fractional boundary value problem
Rahmat
Darzi
Department of Mathematics, Neka Branch, Islamic Azad University, Neka, Iran
author
Bahram
Agheli
Department of Mathematics, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran
author
text
article
2015
eng
In this article, we verify existence and uniqueness of positive and nondecreasing solution for nonlinear boundary value problem of fractional differential equation in the form $D_{0^{+}}^{alpha}x(t)+f(t,x(t))=0, 0<t<1, 2<alpha<3, x(0)= x'(0)=0, x'(1)=beta x(xi)$, where $D_{0^{+}}^{alpha}$ denotes the standard Riemann-Liouville fractional derivative,$0<xi<1$ and $0<\beta\xi^{\alpha-1}<\alpha-1$ Our analysis relies a fixed point theorem in partially ordered sets. An illustrative example is also presented.
Computational Methods for Differential Equations
University of Tabriz
2345-3982
3
v.
2
no.
2015
123
133
http://cmde.tabrizu.ac.ir/article_4649_30ab2f42a41eb1f68dba3f0aab9d34fc.pdf
Multi soliton solutions, bilinear Backlund transformation and Lax pair of nonlinear evolution equation in (2+1)-dimension
Manjit
Singh
Yadavindra College of Engineering, Punjabi University Guru Kashi Campus, Talwandi Sabo
author
text
article
2015
eng
As an application of Hirota bilinear method, perturbation expansion truncated at different levels is used to obtain exact soliton solutions to (2+1)-dimensional nonlinear evolution equation in much simpler way in comparison to other existing methods. We have derived bilinear form of nonlinear evolution equation and using this bilinear form, bilinear Backlund transformations and construction of associated linear problem or Lax pair are presented in straightforward manner and finally for proposed nonlinear equation, explicit one, two and three soliton solutions are also obtained.
Computational Methods for Differential Equations
University of Tabriz
2345-3982
3
v.
2
no.
2015
134
146
http://cmde.tabrizu.ac.ir/article_4769_c037a3bd2246ff1cd130bac4856a2745.pdf