COMPGROUPS.NET | Search | Post Question | Groups | Stream | About | Register

### PDE solution??

• Follow

```I have to solve an equation in the form:

d^2(V)/dt^2 = A d^2(V)/dx^2 + B d(V)/dt

x= space
t= time
A,B= constants

How can I get it with matlab?

thanks
```
 0
Reply mail.plutus (24) 11/28/2006 2:39:39 PM

```pdetool doesn't work?
```
 0

```matt wrote:
>
>
> pdetool doesn't work?

Hi,

pdetool does not take into account de d/dt term...
```
 0
Reply mail.plutus (24) 12/5/2006 2:27:43 PM

```steve wrote:
>
>
> matt wrote:
>>
>>
>> pdetool doesn't work?
>
> Hi,
>
> pdetool does not take into account de d/dt term...

If A and B are constants, than you can solve this PDE in closed form.
Otherwise, why not just use finite differences?

HTH,

Greg
```
 0
Reply gregvwDEL (117) 12/5/2006 4:01:50 PM

```Anything available for finite differences using matlab?

Greg von Winckel wrote:
>
>
> steve wrote:
>>
>>
>> matt wrote:
>>>
>>>
>>> pdetool doesn't work?
>>
>> Hi,
>>
>> pdetool does not take into account de d/dt term...
>
>
> If A and B are constants, than you can solve this PDE in closed
> form.
> Otherwise, why not just use finite differences?
>
> HTH,
>
> Greg
```
 0
Reply mail.plutus (24) 12/5/2006 5:15:06 PM

```The easiest thing would be to discretize in x using centered
differences and then time-step the resulting system of ODEs using
ode45.

What are your boundary conditions for x? I presume you have initial
data for V(x,0) and Vt(x,0)?
```
 0
Reply gregvwDEL (117) 12/5/2006 5:40:39 PM

5 Replies
16 Views

12/16/2012 7:57:58 AM