Equation Icon  T (t,r,z) = T∞ (r[,z ) + Ttr(t,r,z ) ] ∑ ∑ ( ′ ′ ′′ ′′ ) = Ts(z) + 𝜃s,j(t) cos(κ jz) + 𝜃s,j(t)sin(κjz) J0(ksr), (5.24 ) s j