Recent content by Tunneller

What is the definition of shear stress in a cylindrical tube? It seems like sometimes that is written \tau = \mu \frac {\partial u} {\partial r} but then at some magic moment it gets rewritten as \tau = - \mu \frac {\partial u} {\partial r} so as to arrive at formula like \tau = -...

Wow! That's a lot more elegant than what I eventually struggled through... :-) Using a Laplace' transform on the time, then I solved the ODE in x and transformed back. That did use both the boundaries though... I think the reason I have two boundary statements is that I forgot to mention...

Hi, I'm looking for a solution to u_t + A u_x + B (u - f) = 0 where f is a given function linear in x and constant in t. u(x,0) = f(x) u(0,t) = f(0) A and B constant. Does this equation have a name? It's almost the inviscid Burger, but has the damping term (B u) and force term...