دانلود رایگان مقاله انگلیسی طرح حل موج های نفوذ کسر و معادلات کلاین گوردون کسری در مکانیک سیالات - الزویر 2018

عنوان فارسی
یک طرح عددی کارآمد برای حل موج های نفوذ کسر و معادلات کلاین گوردون کسری در مکانیک سیالات
عنوان انگلیسی
An efficient numerical scheme to solve fractional diffusion-wave and fractional Klein–Gordon equations in fluid mechanics
صفحات مقاله فارسی
0
صفحات مقاله انگلیسی
23
سال انتشار
2018
نشریه
الزویر - Elsevier
فرمت مقاله انگلیسی
PDF
نوع مقاله
ISI
نوع نگارش
مقالات پژوهشی (تحقیقاتی)
رفرنس
دارد
پایگاه
اسکوپوس
کد محصول
E10257
رشته های مرتبط با این مقاله
مهندسی مکانیک
گرایش های مرتبط با این مقاله
مکانیک سیالات
مجله
Physica A
دانشگاه
Department of Mathematics - Karaj Branch - Islamic Azad University - Karaj - Iran
کلمات کلیدی
معادله کلین گوردون کسری، معادله نفوذ موج کسر، معادله کلاین گوردون تجزیه کننده کسری، چندجمله ای افقی لژاندر، ماتریس عملیاتی
doi یا شناسه دیجیتال
https://doi.org/10.1016/j.physa.2018.08.086
چکیده

Abstract


The numerous applications of time fractional partial differential equations in different fields of science especially in fluid mechanics necessitate the presentation of an efficient numerical method to solve them. In this paper, Galerkin method and operational matrix of fractional Riemann-Liouville integration for shifted Legendre polynomials has been applied to solve these equations. Some definitions for fractional calculus along with some basic properties of shifted Legendre polynomials have also been put forth. When approximations are substituted into the fractional partial differential equations, a set of algebraic equations would be resulted. The convergence of the suggested method was also depicted. In the end, the linear time fractional Klein-Gordon equation, dissipative KleinGordon equations and diffusion-wave equations were utilized as three examples so as to study the performance of the numerical scheme.

نتیجه گیری

 Concluding remarks


Fractional differential equations have found applications in many different fields. In this paper, the operational matrices of derivative and fractional Riemann-Liouville integration with Legendre polynomials have been successfully applied to compute approximate solutions of some fractional partial differential equations. As test examples, the linear time fractional Klein-Gordan equation, dissipative Klein-Gordan equation and diffusion-wave equation were considered. The numerical results demonstrated that the presented scheme provide approximate solutions in an acceptable agreement with exact solutions. Moreover, results indicated that the propounded approach leads to a better approximation as the order of Legendre polynomials increases. For future works this work can also be generalized and verified for more complicated linear, nonlinear or high dimensions problems. It is worth mentioning that the numerical solutions were obtained using Mathematica 11 software.


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