How can I solve this PDE equation?

4 次查看（过去 30 天）

显示更早的评论

saeed karami 2016-10-14

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/307367-how-can-i-solve-this-pde-equation

评论： Walter Roberson 2016-10-21

采纳的回答： Pritesh Shah

∂c/∂t+Q∂c/∂v=Ri

R1=∑_(i=D)^G▒KFiCf

R2=KFDCF-∑_(i=N)^G▒KDiCD

R3=KFNCF+KDNCD-KNGCN

R4=KFG+KDGCD+KNGCN

I.C.: Ci(v,0)=Cis

B.C.: Q(0,t)=Qin &Ci(0,t)=Ci0

6 个评论
显示 4更早的评论隐藏 4更早的评论

saeed karami 2016-10-21

In this question, all(D, N, NG, F, Fi, DG, FG, FD, FN and Di) are just symbols. For example, D is Just a symbol of R (Just for explain that factors) and don't has amount.

Walter Roberson 2016-10-21

I do not know how to sum over a range of symbols unless the symbols have been ordered in some way. A summation over an unordered set of symbols is denoted by sigma variable_name element_of set; when you have sigma variable_name = value with upper value given, then it is assumed that the variables are orderable and vary by 1 -- e.g., i = N, i = N+1, i = N+2 ... i = G

请先登录，再进行评论。

请先登录，再回答此问题。