Single Phase Turbulent Mixing in Square Rod Arrays at Highly Turbulent Condition

When a single-phase flow exists in the subchannels, the mixing of the mass, energy and momentum between the subchannels consists of two parts, the forced mixing and the natural one. The natural mixing again consists of the diversion flow and the turbulent mixing. The diversion flow mixing is mainly caused by the pressure gradient due to flow obstacles such as spacers or due to the density difference. The turbulent mixing, caused by the eddy motion of fluid across the gap between subchannels, enhances the exchange of momentum and energy through gap with no net transport of mass