RANS modeling for flow in nuclear fuel bundle in pressurized water reactors (PWR)

Investigating the Effects of Interface Topology on Flow Development in Rod Bundle Supported by Spacer Grid with Split Mixing Vane Using STAR-CCM+

“…Holloway et al [21] in their investigation attributed the success of the SST-K-O model to their near wall treatment which relies on damping of the turbulent viscosity in low Reynolds number regions rather than a two-layer wall treatment as implemented in the RTL-K-E model. A better prediction by the SST-K-O model and the non-linear models are also attested to in the works of Holloway et al [21], Ruifeng et al [22], Gandhir et al [23] and Horvath et al [24]. Consistent with the findings of Yang et al [25], Zhu et al [26] established in their analysis appreciable prediction by the standard two-layer k-epsilon model than the realizable two-layer k-epsilon model.…”

Correlation for cross-flow resistance coefficient using STAR-CCM+ simulation data for flow of water through rod bundle supported by spacer grid with split-type mixing vane

“…Holloway et al (2006) in their investigation attributed the success of the SST-K-O model to their near wall treatment which relies on damping of the turbulent viscosity in low Reynolds number regions rather than a two layer wall treatment as implemented in the RTL-K-E model. A better prediction by the SST-K-O model and the non-linear models are also attested to in the works of Holloway et al (2006), Ruifeng et al (2012), Gandhir andHassan (2011) andHorvath andDressel (2012). However as seen in Fig.…”

CFD analysis of intra and inter fuel assembly mixing

“…Bieder et al (2014) and Muller et al (2018) analyzed the AGATE experiments and the NESTOR experiments were studied by Kang and Hassan (2016). Other 5x5 experiments were investigated for example by Conner et al (2013), Holloway et al (2008), Gandhir and Hassan (2011) as well as Nguyen and Hassan (2017). Lee and Choi (2007) showed the effect of different positions and orientations of mixing vanes on thermo-hydraulic performances.…”

“…The renormalization group (RNG) k-ε model had been found to produce the closest agreement with available experimental data. Gandhir and Hassan (2011) have analyzed the flow in a 5×5 rod bundle with mixing grid up to an axial length of 30 hydraulic diameters by using k-ω SST and realizable k-ε model. The magnitude of the calculated cross flow velocity downstream of the grid differs between the two models approximately by a factor of four.…”