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Thread Subject:
Solving PDE's using PDEDE

Subject: Solving PDE's using PDEDE

From: Mohammad Taha Khan

Date: 26 Jun, 2010 23:04:05

Message: 1 of 3

Hello,

I have this partial differential equation.. It shows the degradation of the extracellular matrix
by the action of matrix degrading enzymes.

"partial"v/partial"t" = -c.m.v

where
c = degrading constant
m= enzyme density
v=extracellular matrix density

c=8.15
x=linspace(0,1,20)

I want the solution at t=1,2,3,4
initial boundary conditions:
v(x,0)=1-exp(-x^2/0.01)
m(x,0)=0.5*exp(-x^2/0.01)


The issue is that i am totally unaware of the how to use the "pdepe" function, its syntax and its sub-functions please help me out!

can someone give me an explanation on this issue
In the end I want a 2d plot of x versus v.

Regards.

Subject: Solving PDE's using PDEDE

From: TideMan

Date: 26 Jun, 2010 23:52:37

Message: 2 of 3

On Jun 27, 11:04 am, "Mohammad Taha Khan" <tahakh...@live.com> wrote:
> Hello,
>
> I have this partial differential equation.. It shows the degradation of the extracellular matrix
> by the action of matrix degrading enzymes.
>
> "partial"v/partial"t" = -c.m.v
>
> where
> c = degrading constant
> m= enzyme density
> v=extracellular matrix density
>
> c=8.15
> x=linspace(0,1,20)
>
> I want the solution at t=1,2,3,4
> initial boundary conditions:
> v(x,0)=1-exp(-x^2/0.01)
> m(x,0)=0.5*exp(-x^2/0.01)
>
> The issue is that i am totally unaware of the how to use the "pdepe" function, its syntax and its sub-functions please help me out!
>
> can someone give me an explanation on this issue
> In the end I want a 2d plot of x versus v.
>
> Regards.

You say:
"The issue is that i am totally unaware of the how to use the "pdepe"
function, its syntax and its sub-functions"
Well, there's no excuse whatsoever for being totally unaware.
Do this:
help pdepe
and read what it says.
Then have a go at using it.
Come back here if you have troubles.

Subject: Solving PDE's using PDEDE

From: Faraz Afzal

Date: 27 Jun, 2010 01:23:05

Message: 3 of 3

TideMan <mulgor@gmail.com> wrote in message <f37fa16d-1166-47ad-af92-5c25e539b025@l25g2000prn.googlegroups.com>...
> On Jun 27, 11:04 am, "Mohammad Taha Khan" <tahakh...@live.com> wrote:
> > Hello,
> >
> > I have this partial differential equation.. It shows the degradation of the extracellular matrix
> > by the action of matrix degrading enzymes.
> >
> > "partial"v/partial"t" = -c.m.v
> >
> > where
> > c = degrading constant
> > m= enzyme density
> > v=extracellular matrix density
> >
> > c=8.15
> > x=linspace(0,1,20)
> >
> > I want the solution at t=1,2,3,4
> > initial boundary conditions:
> > v(x,0)=1-exp(-x^2/0.01)
> > m(x,0)=0.5*exp(-x^2/0.01)
> >
> > The issue is that i am totally unaware of the how to use the "pdepe" function, its syntax and its sub-functions please help me out!
> >
> > can someone give me an explanation on this issue
> > In the end I want a 2d plot of x versus v.
> >
> > Regards.
>
> You say:
> "The issue is that i am totally unaware of the how to use the "pdepe"
> function, its syntax and its sub-functions"
> Well, there's no excuse whatsoever for being totally unaware.
> Do this:
> help pdepe
> and read what it says.
> Then have a go at using it.
> Come back here if you have troubles.


I agree with tide,

If you are unaware of something and you want others to do the stuff for you , that would let you stay unaware of that for whole of your life,,...

type in doc pdepe and u will see the examples solved for u..
How the function handles are passed to ur PDE with all the things u explained here.
Try that, use that, solve ur problem.. If u can't post here and i will be more than happy to guide u through..
Meant no hard feelings , just wanna tell u how it works here in MATLAB Newsreader.!!!
Regards,
Faraz

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