TY - JOUR
TI - Mixing enhancement in laminar flow using inclined inverted L-shaped vortex generators
AU - Ikumapayi Omolayo M
AU - Douha Mohammed
AU - Larguech Samia
AU - Kaid Noureddine
AU - Menni Younes
AU - Bayram Mustafa
AU - Bayode Abiodun
AU - Ting Tin Tin
AU - Vural Erdinç
AU - Özer Salih
JN - Thermal Science
PY - 2025
VL - 29
IS - 4
SP - 3211
EP - 3218
PT - Article
AB - This study presents a numerical investigation of the mixing performance and  hydraulic behavior of a static mixer equipped with staggered inverted  L-shaped vortex generators mounted on both the upper and lower walls of a  rectangular channel, operating under laminar flow conditions. The working  fluid is Newtonian with properties similar to water, and mixing is initiated  by the introduction of two inlet streams with a step-change in  concentration. The effects of Reynolds number (Re = 20-600) and vortex  generators inclination angles (30°, 45°, 60°) on mixing efficiency and  pressure drop are systematically evaluated. Results show that higher vortex  generators inclination angles significantly enhance mixing at low to  moderate Reynolds number due to stronger secondary flows and increased  interfacial deformation. However, this improvement is accompanied by a  notable rise in pressure drop. At higher Reynods number, the 30°  configuration achieves a mixing index of 0.9468 with a pressure drop 78%  lower than the 60° case, demonstrating a more favorable balance between  mixing and energy consumption. The optimal configuration is found at a  vortex generators inclination of 30° and Re = 600, offering efficient mixing  with reduced hydraulic resistance.