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with rotational cylinders were few. Some work was performed by Gardiner and Sabersky [10] on

concentric cylinders with three different Prandtl number fluids of 2.5, 4.5 and 6.5. The speeds of

rotation of the inner cylinder were in a range where the Taylor number (an equivalent rotational

Reynolds number) was up to 106.

For the present mixed convective problem with highly eccentric cylindrical configurations, no

work is available in the literature, Such configurations are important in the understanding of the

heat transfer characteristic of a long horizontal rotating shaft in a protective casing of an electric

motor mounted some distance away from the pumps or turbines. Strong convections are

encountered in both the radial and tangential directions in these situations. The interaction of the

thermally influenced fluid with the effect of the high rotational rate (Re >_-2000) of the eccentric

inner cylinder are expected to produce complex three-dimensional flows with Taylor vortices. The

concentric cylinders with three different Prandtl number fluids of 2.5, 4.5 and 6.5. The speeds of

rotation of the inner cylinder were in a range where the Taylor number (an equivalent rotational

Reynolds number) was up to 106.

For the present mixed convective problem with highly eccentric cylindrical configurations, no

work is available in the literature, Such configurations are important in the understanding of the

heat transfer characteristic of a long horizontal rotating shaft in a protective casing of an electric

motor mounted some distance away from the pumps or turbines. Strong convections are

encountered in both the radial and tangential directions in these situations. The interaction of the

thermally influenced fluid with the effect of the high rotational rate (Re >_-2000) of the eccentric

inner cylinder are expected to produce complex three-dimensional flows with Taylor vortices. The

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