Yes you are correct that is the basic equation I am trying to solve. I am getting hung up on the first integral though. I don't understand the steps from solving this:
db/dr=d/dr*(r^2*(db/dr))
I am thinking of this as separation of variables. IE move the dr on the left over to the right...
Homework Statement
integrate [(rs^2)*(rhos)*(us)*(db/dr)=(d/dr)*(r^2)*(rho)*(D)*(db/dr))]
rs=radius at surface
rhos=density at surface
us=velocity at surface
r = radius
rho = density
D= diffusivity
b=spalding non-dimensional parameter
Homework Equations
The Attempt at a...