[問題]Poisson equation-numerical solutions

看板Mathematica作者時間9年前 (2014/12/26 03:25), 編輯推噓1(105)
留言6則, 2人參與, 最新討論串1/1
Consider the nonlinear Poisson equation for u=u(x,y) as follows: u_xx+ u_yy = f(u) in {x,y | x^2+y^2<1} x*u_x+y*u_y=0 on {x,y | x^2+y^2=1} Here f(u) is a function which is implicit in u, and f(u) cannot have an explicit function. Moreover, by using NDSolve f(u) can be numerically plotted point by point. Is it possible to use Mathematica to numerically solve this boundary value problem? Thank you very much! -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 220.133.70.141 ※ 文章網址: http://www.ptt.cc/bbs/Mathematica/M.1419535558.A.63D.html

12/27 12:50, , 1F
10.0版的新功能: DirichletCondition
12/27 12:50, 1F

12/27 12:51, , 2F
12/27 12:51, 2F

12/28 18:01, , 3F
這是nonlinear Poisson eqn, 即 laplacian u=f(u)
12/28 18:01, 3F

12/28 18:02, , 4F
and here f(u) is not equal to 0...
12/28 18:02, 4F

12/28 18:02, , 5F
這樣可以用上面你提供的指令做嗎?
12/28 18:02, 5F

12/28 18:34, , 6F
最上面加上這句:謝謝你的回應,可問題是Neumann cond.
12/28 18:34, 6F
文章代碼(AID): #1Kd6J6Oz (Mathematica)
文章代碼(AID): #1Kd6J6Oz (Mathematica)