Heat transfer in an annular gap

A review of heat transfer between concentric rotating cylinders with or without axial flow

“…This ratio approaches 1 once the cylindrical gap has become narrow; this is the number used by most authors. Gardiner and Sabersky [10] and Becker and Kaye [11] propose: F g ¼ ðp 4 ððR 1 À R 2 Þ=ð2R 1 ÞÞ=1697ð0:0571ð1 À 0:652ðe=R 1 ÞÞÞ þ 0:00056 ð1 À 0:652ðe=R 1 ÞÞ À1 Þ. Some authors (Ref.…”

“…As regards the effects of natural convection occasioned by gravity, Ali and Weidman [30] have shown that the flow depends on the ratio between the Grashof numbers and the tangential Reynolds numbers Re t and that, as regards the Couette flow, the effects are negligible for a Rayleigh number Ra lower than 10 4 .Gardiner and Sabersky [10] and Aoki et al [31] have observed, in their strictly thermal studies, an unusually high critical Taylor number (10 4 instead of 1700), which they attribute to the influence of natural convection in their experiments. Their conclusions lead one to believe that natural convection modifies e and stabilizes e cylindrical gap flow.…”

Flow visualization in an annulus between co-axis rotating cylinders with a circular jet on stationary outer cylinder

“…Becker and Kaya [2] investigated the diabatic flow in annular channel with internal rotating cylinder, and studied the heat transfer rate as well as the relevant physical phenomenon inside the annular gap of the rotary electric machinery, Their experimental data indicated that the diabatic flow has the following types: laminar flow, laminar and Taylor vortex flow, turbulent flow and turbulent and vortex flow. Gardiner and Sabersky [3] studied the heat transfer performance in the annular gap between the stationary outer cylinder and the rotating inner cylinder. There is the axial fluid flow through the annulus.…”

Effects of axial rectangular groove on turbulent Taylor-Couette flow from analysis of experimental data

“…They observed larger effects, both on the momentum and heat transfer when the cavities were located on the inner cylinder rather than on the outer cylinder. Lee & Minkowycz [3] and Gardiner & Sabersky [4] investigated experimentally the heat transfer and pressure drop characteristics of smooth or axially grooved cylinders, with a superimposed Poiseuille flow, for Reynolds numbers based on the rotation rate and on the gap width up to Re i 4000. The authors observed that the presence of grooves on the rotating inner cylinder significantly increased the heat coefficient.…”