The mixing of cooling fluid in rod bundles from one subchannel to another through the gaps
between the rods reduces the temperature differences in the coolant as well as along the …

Fuel pins assembled in Pressurized Water Reactor (PWR) and Liquid Metal-cooled Fast
Reactor (LMFR) core are usually cooled by single-phase coolant such as water or liquid …

The unsteady Reynolds averaged Navier–Stokes equations, combined with a Reynolds
stress model, were solved numerically to determine fully developed isothermal turbulent flow …

The flow in tight rod bundles is characterized by long-term, large-scale coherent patterns in
the stream-wise direction. In the present work, the issue of simulating these structures …

Experiments in laminar flow in a rectangular channel containing a cylindrical rod have
revealed a flow instability in the form of weak pulsations across the gap between the rod and …

Cross-wire anemometry was used to identify and characterize coherent flow pulsations in
isothermal air flow near the gap regions of a five-rod bundle with a design pitch-to-diameter …

Turbulent flow and temperature fields were determined numerically in a rectangular duct
containing a heated rod. As the spacing δ between the rod and the duct wall decreased from …

In spite of the low fuel failure rate in currently operating water cooled nuclear power reactors,
operations are increasingly demanding with higher burn-up, power increases, cycle lengths …

Flow visualization has demonstrated that the critical Reynolds number for flow instability in
the narrow gap of an annular channel with a diameter ratio of about 0.28 increases with …

Three-dimensional, unsteady simulations of developing turbulent flows in a rectangular
channel containing a cylindrical rod have been performed to investigate their sensitivity to …