Thermal Taylor dispersion theory for time-periodic systems was used to study the extent of chaotic laminar heat transfer enhancement and axial thermal dispersion occurring during combined transverse and axial annular flow between two nonconcentric circular cylinders undergoing alternate rotations. A local Newton's 'law of cooling' boundary condition was used on the outer cylinder (partial deriv q_o), whereas the inner cylinder(partial deriv q_i) was supposed insulated. This flow configuration is widely used to study chaotic advection [1], partly because of the availability of an analytical solution for the transverse velocity field (in the Stokes-flow approximation) [2], and partly because of the possibility of experimental verification of the calculated behavior [5].
展开▼
