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Umm, irrotational? What do you mean?

Irrotational flow

LIke the curl is 0?

Ya....is that all I have to do?

gradient X V....?

Hold on, I'm not sure what irrotational is. Can you give me a definition?

Well my textbook it as flows for which no particle rotation occurs

Okay so curl is 0... meaning we need to find if it has a potential function.

there might be another method, I'm not completely sure right now.

Okay. Well, I think it has to do with the gradient (del) cross velocity function (V)

I feel like I kind of understand what is going on, but just not quite able to piece it together.

It has a potential function, that means it's curl is 0, it's conservative, irrotational, etc.

and what he did was gradient x V

and got 0.....so I guess that is the same thing as you are saying essentially, right?

Whoops, did a bit of algebra wrong there.

I keep messing up trying to find the damn potential function. Maybe it doesn't have one.

and then that cross the the velocity vector of vr and vtheta

= 0

We are definitely dealing with polar coordinates, but I think it's still the curl

\[
\frac{dx}{dt} = \frac{dx}{dr}\frac{dr}{dt}
\]

anyway I'm going to bed.

Okay, thanks for your help