“…FAC in a single elbow has been studied previously [2,3]; however, there are limited data available for FAC in 2 consecutive elbows [4,5]. Experiments have been conducted recently at McMaster University [6][7][8][9][10], using the dissolution technique, to quantify wall thinning rates under single-phase flow conditions for 3 arrangements of 2 consecutive elbows, as shown in Figure 1: (i) in-plane S-configuration; (ii) in-plane C-configuration; and (iii) outof-plane configuration. These experimental results were compared with the numerical results to validate the models in this study.…”