Reduction of Secondary Motion in Curved Tubes by Polymer Additives

@inproceedings{Tsang1980ReductionOS,
  title={Reduction of Secondary Motion in Curved Tubes by Polymer Additives},
  author={Hoi Yip Tsang and David Field James},
  year={1980}
}
Studies of laminar flow of liquids in curved tubes have shown that the addition of a small amount of high‐molecular‐weight polymer delays departure from Poiseuille flow (straight pipe) behavior and increases the flow rate at higher Dean numbers. Since polymer solutions have high resistance to extension, and since portions of the vortical secondary motion in a curved tube are strongly extensional in nature, the increased flow rate is attributed to attenuation of the secondary motion. Deformation… CONTINUE READING