“…The arrangement of obstacles, such as baffles, fins, and ribs, within channels, are among the effective methods used by many researchers and investigators in their numerical and experimental studies. For example, see Berner et al [1], Habib et al [2], Yuan et al [3], Cheng and Huang [4], Hong and Hsieh [5], Bazdidi-Tehrani and Naderi-Abadi [6], Demartini et al [7], Li and Kottke [8], Mousavi and Hooman [9], Pirouz et al [10], Mokhtari et al [11], Webb and Ramadhyani [12], Wen et al [13], Dong et al [14], Skullong et al [15], Thianpong et al [16], Nanan et al [17], Promvonge [18], Du et al [19], and Menni et al [20][21][22][23][24][25][26][27][28][29][30]). These studies have adopted many obstacles in various forms to give channels with high energy efficiency.…”