r1 50[um] "Inner radius" r2 150[um] "Outer radius" L 1000[um] "Rectangular channel length" kk 0.55228474 "Bezier curve parameter" RL 200[um] "Recovery length" IL 700[um] "Integration length" P1 50[um] "Optimization parameter 1" P2 50[um] "Optimization parameter 2" P3 0.5 "Optimization parameter 3" P4 0.5 "Optimization parameter 4" P5 0.5 "Optimization parameter 5"