Written in English
|Statement||by Randall Lee Scheel.|
|The Physical Object|
|Pagination||, 192 leaves, bound :|
|Number of Pages||192|
Determination of turbulent mixing rate of two phase flow between neighboring subchannels is an important aspect of sub channel analysis in reactor rod bundles. Various models have been developed for two phase turbulent mixing rate between subchannels. These models show that turbulent mixing rate is strongly dependent on flow regimes; their validity was examined . Streamwise flow nonuniformity is characterized by a transverse flow across the river. At the interface between main channel (MC) and floodplain (FP), a mixing layer populated by turbulent vortices develops. When the flow is nonuniform, the mixing layer is strongly by: The peak frequency values at W–Co channel could have about 40%–50% reduction comparing with the C–C channel value and the turbulent mixing coefficient β . In order to obtain the data on turbulent mixing rate between triangle tight lattice subchannels, which will be adopted as the next generation BWR fuel rod bundle, adiabatic experiments were conducted for single- and two-phase flows under hydrodynamic equilibrium flow conditions. The gas and liquid mixing rates measured for two-phase flows were found to be affected by the .
average coolant density between adjacent sub-channel i and k on axial node j, kg/m 3. h j. coolant enthalpy on axial node j, J/kg. β. turbulent mixing coefficient. λ j, i k. average thermal conductivity between adjacent sub-channel i and k on axial node j, W/(m ⋅ K) l i k. turbulent length between adjacent sub-channel i and k, m. T i, j. Walton () measured the turbulent mixing rates for single phase air, single phase water, and two phase air-water flows between two adjacent triangular sub-channels, as shown in Fig. Two parallel triangular sub-channels of . K.P. Galbraith and J.G. Knudsen, Turbulent mixing between adjacent channels for single-phase flow in a simulated rod bundle, 12th Natl. Heat Transfer Conf., Tulsa, in AIChE Syrup. Ser. 68 () 90 G. Hetsroni, J. Leon and M. Hakim, Cross flow and mixing of water between semiopen channels, Nucl. Sci. Eng. 34 () K. The Turbulent Mixing Rate and the Fluctuations of Static Pressure Difference Between Adjacent Subchannels in a Two-Phase Subchannel Flow Nucl. Eng. Des.
Turbulent Dissipation and Mixing  Estimates of turbulent dissipation rates in coastal zones are important in determining vertical mixing of tracers. Variability in turbulent mixing on the shelf has been attributed to various physical phenomena and often spans several orders of magnitude [Carter et al., ]. Conventional estimates of. turbulent flows in pipes and channels. That will necessitate a deeper examination of the nature of shear stresses in turbulent flow, and a careful consideration of the differences between what I will call smooth flow and rough flow. The outcome will be some widely useful techniques as well as greatly increased understanding. Abstract Turbulent mixing rate between adjacent subchannels in a two-phase flow has been known to be strongly dependent on the flow pattern. The most important aspect of turbulent motion is that th. Turbulent Dissipation and Mixing  Estimates of turbulent dissipation rates in coastal zones are important in determining vertical mixing of tracers. Variability in turbulent mixing on the shelf has been attributed to various physical phenomena and often spans several orders of magnitude [Carter et al., ]. Conventional estimates of.