Heat transfers and radial flows via a viscous fluid squeezed between two parallel disks

For the physical system (shown in Fig. 1 in the paper), the convective effect in the axial direction is considered and an analytical solution of the governing equations achieved. Good agreement is found between the analytical and numerical solutions so corroborating the approach adopted. For a small gap between the disks, heat actually flows into the upper disk, even though the imposed temperature difference would initially have been considered to cause the heat flux to be out of the upper disk. The radial pressure-distribution in the viscous liquid is presented as a function of the Reynolds number and R0/d ratio. Axial bulk convection rises as the separation between the two disks increases. Fig. 1. (a) Schematic section orthogonal to the two identical parallel disks; approach velocity u; (b) three-dimensional view of the two identical parallel disks.