TY - JOUR
TI - Numerical study of laminar flow in a sudden expansion obstacled channel
AU - Mushatet Khudheyer S
AU - Rishakb Qais A
AU - Fagr Mohsen H
JN - Thermal Science
PY - 2015
VL - 19
IS - 2
SP - 657
EP - 668
PT - Article
AB - In the present work, a numerical study has been conducted to investigate the  flow heat transfer through an obstacled sudden expansion channel. Rectangular  adiabatic obstacles mounted behind the expansion region on the upper and  lower wall of the channel used. The effects of obstacles length, obstacles  thickness and number of obstacles on flow and thermal fields for different  Reynolds number and expansion ratio examined. Three values of expansion ratio  (ER) equal to 1.5, 1.75 and 2 were used. The choice of values of Reynolds  number takes in consideration the symmetry state. The governing equations of  continuity, momentum and energy discretized by using the finite difference  formulation and the resulting algebraic equations solved by using  Gauss-Seidle iteration method. The obtained results show that the obstacles  have a considerable effect on dynamics of the flow and enhancement of heat  transfer. In addition, it is found that the heat transfer is enhanced more as  the obstacles thickness increases and this trend is decreased as the  obstacles length increases.