# Parker's Spiral Solution

1. Feb 21, 2007

### physicsstudent

I hope Ive got the right forum...basically I'm trying to solve Parker's spiral equation via integration. I have the beginning equation (which Ive already proved), and I know what the answer should be, but I cant seem to get the right answer, so I was hoping to get a little help on the integration (I think I'm assuming constants are variables or vice-versa by mistake).

My starting equation is:
(v^2 -vc^2).1/v.(dv/dr) = 2.vc^2 . (r - rc) / r^2
This is pretty much the same form as equation 726 at this webpage:
http://farside.ph.utexas.edu/teaching/plasma/lectures/node66.html
(v is the same as u)

My end equation should be equation 727 on the same webpage.

What should I be treating as constants and variables?

Any help would be much much appreciated :)