# Thread: Partial Differenetial Equation

2. ## Re: Partial Differenetial Equation

Hey helpthanks.

What do you know about tensor formulation? If you don't know about tensor formulation you need to learn it to answer these kinds of questions.

3. ## Re: Partial Differenetial Equation

This is what I have, thought?. ρcp (δT/δt) = k (δ2T/δr2) + (k/r2)(δ2T/δθ2) + k(δ2T/δz2) Note all the 2s are squares.

4. ## Re: Partial Differenetial Equation

Do you know the tensor formulation for the statement in co-ordinate free representation?

I ask this because if you don't, then learning it will make these problems very easy to not only understand how to solve, but also conceptually.

5. ## Re: Partial Differenetial Equation

If i know it I don't know it by that name. Thanks for the help.