Solitary Wave Solutions of the Generalized Rosenau-KdV-RLW Equation

This paper investigates the solitary wave solutions of the generalized Rosenau–Korteweg-de Vries-regularized-long wave equation. This model is obtained by coupling the Rosenau–Korteweg-de Vries and Rosenau-regularized-long wave equations. The solution of the equation is approximated by a local meshless technique called radial basis function (RBF) and the finite-difference (FD) method. The association of the two techniques leads to a meshless algorithm that does not requires the linearization of the nonlinear terms. First, the partial differential equation is transformed into a system of ordinary differential equations (ODEs) using radial kernels. Then, the ODE system is solved by means of an ODE solver of higher-order. It is shown that the proposed method is stable. In order to illustrate the validity and the efficiency of the technique, five problems are tested and the results compared with those provided by other schemes.info:eu-repo/semantics/publishedVersio

A numerical study using finite element method for generalized RosenauKawahara-RLW equation

In this paper, we are going to obtain the soliton solution of the generalized RosenauKawahara-RLW equation that describes the dynamics of shallow water waves in oceans and rivers. We confirm that our new algorithm is energy-preserved and unconditionally stable. In order to determine the performance of our numerical algorithm, we have computed the error norms L2 and L∞. Convergence of full discrete scheme is firstly studied. Numerical experiments are implemented to validate the energy conservation and effectiveness for longtime simulation. The obtained numerical results have been compared with a study in the literature for similar parameters. This comparison clearly shows that our results are much better than the other results

Lineer olmayan sobolev türü kısmi türevli diferansiyel denklemlerin tanh-coth yöntemi ile çözümü

06.03.2018 tarihli ve 30352 sayılı Resmi Gazetede yayımlanan “Yükseköğretim Kanunu İle Bazı Kanun Ve Kanun Hükmünde Kararnamelerde Değişiklik Yapılması Hakkında Kanun” ile 18.06.2018 tarihli “Lisansüstü Tezlerin Elektronik Ortamda Toplanması, Düzenlenmesi ve Erişime Açılmasına İlişkin Yönerge” gereğince tam metin erişime açılmıştır.Birçok fiziksel olguyu açıklayan Sobolev türü denklemler, boyuta ve zamana bağlı türevleri, en yüksek mertebeden türevli terimlerinde bulundurmaları ile karakterize edilmektedir. En yüksek mertebeli türevlerinde sadece bir tane zamana bağlı türev bulunduran denklemler ise pseudoparabolik denklem olarak adlandırılır ve bu denklemler Sobolev türü denklemlerin özel bir durumudur. Bu çalıĢmada iyi bilinen Sobolev ve pseudoparabolik denklem türleri ele alınmıĢ ve bu denklemlerin genel özellikleri verilmiĢtir. Tanh-coth yöntemi lineer olmayan kısmi türevli diferansiyel denklemlerin hareketli dalga çözümlerini bulmada etkili ve güvenilir bir yöntemdir. Bugüne kadar bu yöntem yoğun olarak kullanılmıĢ ve yöntemin Riccati denklemi kullanılarak elde edilen modifikasyonları literatürde tartıĢılmıĢtır. Bu tezde, tanh-coth yönteminin temel özellikleri ve bu yöntemin diğer uzantıları ele alınmıĢtır. Buna ek olarak tanhcoth yöntemi, sembolik hesaplama sistemleri yardımıyla Sobolev türü denklemlerin tam çözümlerini araĢtırmada kullanılmıĢ ve bu denklemlerin birçok hareketli dalga çözümü elde edilmiĢtir. Elde edilen bu sonuçlar daha önce elde edilen bilgilerin bir doğrulaması ve geliĢtirilmesi olarak görülebilir. ÇalıĢma boyunca, cebirsel iĢlemler için Maple ve Scientific Work Place programları kullanılmıĢtır.Sobolev type equations have been used to describe many physical phenomena and they are characterized by having mixed time and space derivatives appearing in the highest-order terms of an partial differential equation. Equations with a one time derivative appearing in the highest order term are called pseudoparabolic and they are special case of Sobolev equations. In this work, well-known Sobolev and pseudoparabolic type equations have been considered and general properties of these equations have been given. The tanh-coth is a powerful and reliable technique for finding travelling wave solutions for nonlinear partial differential equations. This method has been used extensively and it was subjected by some modifications using the Riccati equation. The main features of the tanh-coth method and various extension forms of this method have been discussed in this thesis. Furthermore, the tanh-coth method with the aid of symbolic computational systems has been employed to investigate exact solutions of Sobolev type equations and abundant travelling wave solutions have been found. The results obtained can be viewed as a verification and improvement of the previously known data. Throughout the study, Maple and Scientific Work Place was used to deal with the tedious algebraic operations

Numerical approximation of the generalized regularized long wave equation using Petrov–Galerkin finite element method

The generalized regularized long wave (GRLW) equation has been developed to model a variety of physical phenomena such as ion-acoustic and magnetohydro dynamic waves in plasma,nonlinear transverse waves in shallow water and phonon packets in nonlinear crystals. This paper aims to develop andanalyze a powerful numerical scheme for the nonlinear GRLWequation by Petrov–Galerkin method in which the elementshape functions are cubic and weight functions are quadratic B-splines. The proposed method is implemented to three ref-erence problems involving propagation of the single solitarywave, interaction of two solitary waves and evolution of solitons with the Maxwellian initial condition. The variational for-mulation and semi-discrete Galerkin scheme of the equation are firstly constituted. We estimate rate of convergence of such an approximation. Using Fourier stability analysis of thelinearized scheme we show that the scheme is uncondition-ally stable. To verify practicality and robustness of the new scheme error norms L2, L∞ and three invariants I1, I2,and I3 are calculated. The computed numerical results are compared with other published results and confirmed to be precise and effective

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

Applications of Mathematical Models in Engineering

The most influential research topic in the twenty-first century seems to be mathematics, as it generates innovation in a wide range of research fields. It supports all engineering fields, but also areas such as medicine, healthcare, business, etc. Therefore, the intention of this Special Issue is to deal with mathematical works related to engineering and multidisciplinary problems. Modern developments in theoretical and applied science have widely depended our knowledge of the derivatives and integrals of the fractional order appearing in engineering practices. Therefore, one goal of this Special Issue is to focus on recent achievements and future challenges in the theory and applications of fractional calculus in engineering sciences. The special issue included some original research articles that address significant issues and contribute towards the development of new concepts, methodologies, applications, trends and knowledge in mathematics. Potential topics include, but are not limited to, the following: Fractional mathematical models; Computational methods for the fractional PDEs in engineering; New mathematical approaches, innovations and challenges in biotechnologies and biomedicine; Applied mathematics; Engineering research based on advanced mathematical tools

On the convergence of the modified Rosenau and the modified Benjamin-Bona-Mahony equations

We consider the modified Rosenau and the modified Benjamin-Bona-Mahony equations, which contain nonlinear dispersive effects. We prove that as the diffusion parameter tends to zero, the solutions of the dispersive equations converge to entropy solutions of a scalar conservation laws. The proof relies on deriving suitable a priori estimates together with an application of the compensated compactness method in the $L^p$ setting