spherical diffusion PDE problem

2022 7 13
0 个回答
更新时间：2022 7 13
4 次查看（30 天）

0 个投票

I am attempting to solve this relationship in MATLAB but I'm not quite sure how to convert this into something that MATLAB's pdepe function can solve. This is a spherical system so m=2. I can fill in my boundary conditions accordingly for bcfun and icfun.
Can anyone help please? Would greatly appreciate it. Thanks

3 个评论
显示 1更早的评论 隐藏 1更早的评论

Torsten
Torsten 2022-7-13
编辑：Torsten 2022-7-13
If you set m=2, MATLAB's "pdepe" solves the above equation. But why (-D) instead of D ? Do you want to use a negative value for D ?
Juliana
Juliana 2022-7-13
that was a mistake, confused fick's first and second law. youre right -- should be positive D.
so are you saying that this is the default when I put m=2?
i thought i would have to write this out in a different way for matlab to understand. in that case, does g=1? and f=D*DcDx?
thank you very much for the help Torsten.
Torsten
Torsten 2022-7-13
See the answer to your second post.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Eigenvalue Problems 的更多信息

产品

版本

R2022a

标签

提问:

Juliana
Juliana
2022-7-13

评论：

Torsten
Torsten
2022-7-13

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by