首页 | 本学科首页   官方微博 | 高级检索  
     检索      

一类双重退化的奇异扩散方程
引用本文:詹华税,;汤林冰.一类双重退化的奇异扩散方程[J].鹭江职业大学学报,2014(5):88-92.
作者姓名:詹华税  ;汤林冰
作者单位:[1] 厦门理工学院应用数学学院,福建 厦门361024; [2] 集美大学理学院,福建 厦门361021
基金项目:国家自然科学基金项目(11371297)
摘    要:根据YIN和WANG的方法,结合Fichera-Oleinik理论,研究奇异扩散方程:φ( u)/t =div(ραu p-2u),(x,t)∈QT =Ωx(0,T),其中Ω是RN 中的有界区域,边界Ω充分光滑,ρ(x)=dist(x,Ω), p 〉1,α〉0,φ满足:φ∈C2,且存在δ〉0使得φ′(s)〉δ〉0.证明了α≥p -1时,不需要任何边值条件,方程最多有一个满足初值条件的解;而0〈α〈 p -1时,方程存在唯一满足初边值条件弱解.

关 键 词:奇异扩散  弱解  Fichera-Oleinik理论

A Double Degenerate Singular Diffusion Equation
Institution:ZHAN Hui-shui, TANG Lin-bing ( 1. School of Applied Mathematics, Xiamen University of Technology, Xiamen 361024, China; 2. School of Science, Jimei University, Xiamen 361021, China) ( 1. School of Applied Mathematics, Xiamen University of Technology, Xiamen 361024, China; 2. School of Science, Jimei University, Xiamen 361021, China)
Abstract:The paper studies the singular diffusion equation in the method of YIN ’s and WANG ’s with Fichera-Oleinik theory:φ(u)/t = div(ρα u p-2 u),(x,t)∈QT = Ωx (0,T), whereΩis a bounded domain in RN with appropriately smooth boundaryΩ,ρ(x) = dist(x,Ω) , p 〉 1,α 〉 0 ,φ∈C2 , and there existsδ 〉0 such thatφ′( s) 〉 δ 〉0 . The paper proves that ifα≥p-1 , the equation admits a unique solution subject only to a given initial condition without any boundary condition, while if 0 〈 α 〈 p -1 , for a given initial condition, the equation admits different solutions for different boundary conditions.
Keywords:singular diffusion  weak solution  Fichera-Oleinik theory
本文献已被 维普 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号