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Student Support Forum: 'PDE with two variable' topicStudent Support Forum > General > "PDE with two variable"

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Author Comment/Response
Martin Wijaya
12/15/12 09:42am

In Response To 'Re: Re: Re: PDE with two variable'
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Dear Mr. Bill

I have tried your suggestion and it is worked. However another error occured.

I write it down like this:
NDSolve[{Derivative[0, 1][u][z, t] == 0.1*Derivative[2, 0][u][z, t],
u[z, 0] == 100, Derivative[1, 0][u][2, t] == 0},
u[z, t], {z, 0, 2}, {t, 0, 100}]

And I got this message
NDSolve::bcart: Warning: An insufficient number of boundary conditions have been specified for the direction of independent variable z. Artificial boundary effects may be present in the solution.

and the output is:
{{u[z,t]->InterpolatingFunction[{{0.,2.},{0.,100.}},<>][z,t]}}

I tried to move on with this error to plot the result and I got this error:

NDSolve::dsvar: 0.00014299999999999998` cannot be used as a variable. >>
NDSolve::dsvar: 0.00014299999999999998` cannot be used as a variable. >>
NDSolve::dsvar: 0.14300014285714285` cannot be used as a variable. >>
General::stop: Further output of NDSolve::dsvar will be suppressed during this calculation. >>

How should I solve this problem?

Regards
Martin WIjaya

Attachment: NDSsolve practice.nb, URL: ,

Subject (listing for 'PDE with two variable')
Author Date Posted
PDE with two variable Martin Wijaya 12/12/12 10:27am
Re: PDE with two variable Bill Simpson 12/12/12 12:02pm
Re: Re: PDE with two variable Martin Wijaya 12/13/12 09:33am
Re: Re: Re: PDE with two variable Bill Simpson 12/13/12 11:02am
Re: Re: Re: Re: PDE with two variable Martin Wijaya 12/15/12 09:42am
Re: Re: Re: Re: Re: PDE with two variable Bill Simpson 12/16/12 1:46pm
Re: Re: Re: Re: Re: Re: PDE with two variable Martin Wijaya 12/17/12 11:28am
Re: PDE with two variable Martin Wijaya 12/17/12 00:18am
Re: Re: PDE with two variable Bill Simpson 12/17/12 10:59am
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