Recent content by greggleslarue

not the original equation i wrote but the original equation cyosis wrote. Thanks

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...