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022			_a0017-9310
100			_aC.J. Chang _9880739
100			_aJ.A.C. Humphrey _9880740
100			_aR. Greif _9880741
245			_aCalculation of turbulent convection between corotating disks in axisymmetric enclosures
300			_a2701-2720 p.
520			_aA numerical investigation is conducted for the case of turbulent flow in the unobstructed space between a pair of centrally clamped coaxial disks corotating in a fixed axisymmetric enclosure. The finite difference procedure of Chang et al. (J. Heat Transfer111, 625–632 (1989)) is extended to include a standard two-equation (κ-ε) model of turbulence in the core of the flow. A van Driest relation, that accounts for the effects of streamline curvature and wall shear on the energy-containing length scales, is used in conjunction with Prandtl's mixing length hypothesis to model the near wall flow. The set of equations is solved assuming a constant property, circumferentially symmetric, statistically stationary flow. This approach predicts mean velocity and heat transfer results that are in good agreement with timeaveraged experimental data. The predictions reveal a flow that, in non-dimensional variables, tends to a limiting asymptotic state at high Reynolds numbers. In the absence of blowing a symmetrical pair of crossstream eddies appear near the enclosure wall the rotation of which increases with increasing disk rotational speed. High rotational speeds, in excess of 2400 rpm in the configuration studied, and small disk separations induce large values of shear and temperature (due to viscous dissipation) in the vicinity of the enclosure wall. The flow and its heat transfer characteristics can be drastically altered by the combined effects of radial and axial blowing. Specifically, it is shown that axial blowing significantly reduces the shear and heat transfer at the curved enclosure wall.
650			_aCalculation _9880617
650			_aTurbulent Convection _9842255
650			_aCorotating Disks _9880742
650			_aAaxisymmetric enclosures _9880743
773	0		_x00179310 _tInternational Journal of Heat and Mass Transfer _dNew York, U.S.A : Pergamon Subsidiary of Elsevier Science & Technology
856			_uhttps://www.sciencedirect.com/science/article/pii/0017931090902059
942			_2ddc _n0 _cART _o14993 _pMr. Muhammad Rafique Al Haj Rajab Ali (Late)
999			_c814939 _d814939