39 research outputs found
Numerical solution of the modified equal width wave equation
Numerical solution of the modified equal width wave equation is obtained by using lumped
Galerkin method based on cubic B-spline finite element method. Solitary wave motion and
interaction of two solitary waves are studied using the proposed method. Accuracy of the
proposed method is discussed by computing the numerical conserved laws L2 and L∞ error norms. The numerical results are found in good agreement with exact solution. A linear stability analysis of the scheme is also investigated
Subdomain finite element method with quartic B-splines for the modified equal width wave equation
In this paper, a numerical solution of the modified equal width wave (MEW) equation, has
been obtained by a numerical technique based on Subdomain finite element method with quartic Bsplines. Test problems including the motion of a single solitary wave and interaction of two solitary waves are studied to validate the suggested method. Accuracy and efficiency of the proposed method are discussed by computing the numerical conserved laws and error norms L2 and L∞. A linear stability analysis based on a Fourier method shows that the numerical scheme is unconditionally stable
Septic B spline collocation method for the numerical solution of the modified equal width wave equation
Numerical solutions of the modified equal width wave equation are obtained by using collocation method with septic B-spline finite elements with three different linearization techniques. The motion of a single solitary wave, interaction of two solitary waves and birth of solitons are studied using the proposed method. Accuracy of the method is discussed by computing the numerical conserved laws error norms L2 and L∞. The numerical results show that the present method is a remarkably successful numerical technique for solving the MEW equation. A linear stability analysis shows that this numerical scheme, based on a Crank Nicolson approximation in time, is unconditionally stable
An Accurate Numerical Solution for the Modified Equal Width Wave Equation Using the Fourier Pseudo-Spectral Method
Abstract In this study, the numerical solution for the Modified Equal Width Wave (MEW) equation is presented using Fourier spectral method that use to discretize the space variable and Leap-frog method scheme for time dependence. Test problems including the single soliton wave motion, interaction of two solitary waves and interaction of three solitary waves will use to validate the proposed method. The three invariants of the motion are evaluated to determine the conservation properties of the generated scheme. Finally, a Maxwellian initial condition pulse is then studied. The L2 and L∞ error norms are computed to study the accuracy and the simplicity of the presented method
A septic B-spline collocation method for solving the generalized equal width wave equation
In this work, a septic B-spline collocation method is implemented to find the numerical solution of the generalized equal width (GEW) wave equation by using two different linearization techniques. Test problems including single soliton, interaction of solitons and Maxwellian initial condition are solved to verify the proposed method by calculating the error norms L2 and L∞ and the invariants I1, I2 and I3. Applying the Von-Neumann stability analysis, the proposed method is shown to be unconditionally stable. As a result, the obtained results are found in good agreement with the some recent results
Numerical investigations of shallow water waves via generalized equal width (GEW) equation
In this article, a mathematical model representing solution of the nonlinear generalized
equal width (GEW) equation has been considered. Here we aim to investigate solutions
of GEW equation using a numerical scheme by using sextic B-spline Subdomain finite
element method. At first Galerkin finite element method is proposed and a priori bound
has been established. Then a semi-discrete and a Crank-Nicolson Galerkin finite element
approximation have been studied respectively. In addition to that a powerful Fourier series
analysis has been performed and indicated that our method is unconditionally stable.
Finally, proficiency and practicality of the method have been demonstrated by illustrating it
on two important problems of the GEW equation including propagation of single solitons
and collision of double solitary waves. The performance of the numerical algorithm has
been demonstrated for the motion of single soliton by computing L∞ and L2 norms and
for the other problem computing three invariant quantities I1, I2 and I3. The presented
numerical algorithm has been compared with other established schemes and it is observed that the presented scheme is shown to be effectual and valid
Application of the collocation method with b-splines to the gew equation
In this paper, the generalized equal width (GEW) wave equation is solved numerically by using a quintic B-spline collocation algorithm with two different linearization techniques. Also, a linear stability analysis of the numerical scheme based on the von Neumann method is investigated. The numerical algorithm is applied to three test problems consisting of a single solitary wave, the interaction of two solitary waves, and a Maxwellian initial condition. In order to determine the performance of the numerical method, we compute the error in the L2- and L∞ norms and in the invariants I1, I2, and I3 of the GEW equation. These calculations are compared with earlier studies.
Afterwards, the motion of solitary waves according to different parameters is designe
Numerical solutions of the generalized equal width wave equation using the Petrov–Galerkin method
In this article, we consider a generalized equal width wave (GEW) equation
which is a significant nonlinear wave equation as it can be used to model many problems occurring in applied sciences. Here we study a Petrov–Galerkin method for the model problem, in which element shape functions are quadratic and weight functions are linear B-splines. We investigate the existence and uniqueness of solutions of the weak form of the
equation. Then, we establish the theoretical bound of the error in the
semi-discrete spatial scheme as well as of a full discrete scheme at t = t
n.
Furthermore, a powerful Fourier analysis has been applied to show that the
proposed scheme is unconditionally stable. Finally, propagation of solitary
waves and evolution of solitons are analyzed to demonstrate the efficiency
and applicability of the proposed scheme. The three invariants (I1, I2 and I3)
of motion have been commented to verify the conservation features of the
proposed algorithms. Our proposed numerical scheme has been compared
with other published schemes and demonstrated to be valid, effective and
it outperforms the others
Petrov galerkin method with cubic B splines for solving the MEW equation
In the present paper, we introduce a numerical solution algorithm based
on a Petrov-Galerkin method in which the element shape functions are cubic
B-splines and the weight functions quadratic B-splines . The motion of a single
solitarywave and interaction of two solitarywaves are studied. Accuracy
and efficiency of the proposed method are discussed by computing the numerical
conserved laws and L2 , L¥ error norms. The obtained results show
that the present method is a remarkably successful numerical technique for
solving the modified equal width wave(MEW) equation. A linear stability
analysis of the scheme shows that it is unconditionally stable