TY - JOUR
TI - Numerical investigation of the interaction between the roughness and the triangular obstructions in a rectangular channel
AU - Sari Hassoun Zakaria
AU - Aliane Khaled
AU - Akgül Ali
AU - Jarrar Rabab
AU - Asad Jihad
AU - Menni Younes
AU - Ahmad Hijaz
JN - Thermal Science
PY - 2023
VL - 27
IS - 101
SP - 365
EP - 372
PT - Article
AB - The study is conducted around a heat exchanger, its channel is horizontal  rect­angular, its upper wall is isothermal, while its lower wall is  thermally insulated, containing extended surfaces in the form of triangular  obstacles attached in a stag­gered manner periodically. Four models of the  channel with various roughnesses were compared in this study. Square,  triangular Type 1, triangular Type 2, and triangular Type 3 roughnesses,  which are positioned on the hot top part of the channel (absorber),  downstream of the last obstacle, are examined to promote heat transfer  between the absorber and the heat transfer fluid. The case of triangular  roughness (Type 3) is the optimal case in terms of improved heat transfer.  More­over, it shows a significant decrease in terms of friction values.