Effects of wire-spacer shape in LMR on thermal–hydraulic performance

Thermal–hydraulic numerical simulation of fuel sub-assembly using a dedicated meshing tool

“…Gajapathy et al (2015), Natesan et al (2010), Péniguel et al (2010), Kim and Ahmad (2005) and Ahmad and Kim (2006) successfully analyzed the three-dimensional turbulent flow and heat transfer in wire-wrapped assembly based on RANS calculations. Raza and Kim (2008) performed similar studies and concentrated on the wire-spacer shape. Taking into account the difficulty to properly mesh the complex geometry of a fuel sub-assembly, these results were encouraging, since it appears that RANS computations can reproduce the correct flow description.…”

“…Flow and heat transfer Péniguel et al (2010) 7-271 Flow and heat transfer Kim and Ahmad (2005) 217 Flow and heat transfer Ahmad and Kim (2006) 7-19 Flow and heat transfer Raza and Kim (2008) 7 Wire-spacer shape Chang and Tavoularis (2007) 37 P/Dp < 1.3 Baglietto (2007) 217 P/Dp < 1.3 Pointer et al (2008) 7 LES approach Pointer et al (2009a) 217 RANS approach Rolfo et al (2012) 19…”

Investigation of pressure loss and velocity distribution in fuel assemblies with wire-wrapped rods by using RANS and LES with wall functions

“…About 10 years ago, most of the numerical investigations have been done by RANS modelling and logarithmic wall functions. This modeling seems to overestimate the pressure loss as shown for instance by Gajapathy (2009) and Raza (2008).…”

A multi-stage approach of simulating turbulence-induced vibrations in a wire-wrapped tube bundle for fretting wear prediction

“…Examples of CFD work investigating the flow in wire-wrapped fuel bundles are the papers of Ahmad and Kim [6], Raza and Kim [7], Hamman and Berry [8], Sreenivasulu [9], Rolfo et al [10], Jeong et al [5], Merzari et al [11],…”