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

pdetool doesn't work?

matt wrote:
>
>
> pdetool doesn't work?
  
Hi,

pdetool does not take into account de d/dt term...

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

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

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)?