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Topic: Pdepe
Replies: 3   Last Post: Mar 25, 2013 7:25 AM

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Torsten

Posts: 1,459
Registered: 11/8/10
Re: Pdepe
Posted: Mar 25, 2013 7:25 AM
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"Igor" wrote in message <kikgts$n79$1@newscl01ah.mathworks.com>...
> Thank you Nasser for such quick reply.
>

> > how many elements are you using?
> 16 elements which concentration I would like to find with oscillating BC
>

> > > As I know pdepe uses FEM method. Am I right?
> > yes.
> Where can I read about method in details which used for pdepe?
>


Skeel, R. D. and M. Berzins, "A Method for the Spatial Discretization of Parabolic Equations in One Space Variable," SIAM Journal on Scientific and Statistical Computing, Vol. 11, 1990, pp.1?32.

> >> Can we trust them?
> > Do not trust any one.
> I agree. And in this article they used only steady state conditions.
>
> 1. Maybe pdepe not so good for oscillating?
>
> 2. What do you think about using FD method for this task?


The discretization method is not important in 1d.

>
> 3. How can I calculate the accuracy of pdepe?


Double the number of discretization points and look how much the results change.

>
> 4. What tools can I use for optimization of calculation speed? Is there any sense to use Matlab runtime compiler and import it to c++ code? Speed will be better?


Check it out.

>
> 5. Can I use somehow parallel computations here?


No.

>
> Regards,
> Igor


Best wishes
Torsten.


Date Subject Author
3/25/13
Read Re: Pdepe
Torsten
3/25/13
Read Re: Pdepe
Torsten

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