# Math Help - Diffusion Equation for the rod

1. ## Diffusion Equation for the rod

Dear all,

I have a freely diffusing rod in 3D. I need to find the PDF(x,y,z,t) for the end of the rod.

For this I need to solve the diffusion equation for PDF of the end of rod. Can someone write this equation?

Thanks.

2. ## Re: Diffusion Equation for the rod

Well, before the internet was big, there used to be books and libraries and stuff like that.

3. ## Re: Diffusion Equation for the rod

Originally Posted by Rafael
Dear all,

I have a freely diffusing rod in 3D. I need to find the PDF(x,y,z,t) for the end of the rod.

For this I need to solve the diffusion equation for PDF of the end of rod. Can someone write this equation?

Thanks.
maybe this will help

4. ## Re: Diffusion Equation for the rod

Originally Posted by romsek
maybe this will help
Dear romsek, I am looking for the diffusion equation for diffusing rod in some medium, not for the heat "diffusing" in rod.