Effects of fluid viscoelasticity on the performance of an axial blood pump model.
An aqueous Xanthan gum solution (XGS) was used as blood analog fluid to explore the influence of fluid viscoelasticity on the performance of an axial blood pump model. For comparison, a 39 wt% Newtonian aqueous glycerin solution (GS), the common fluid in blood pump tests, was also used as a working fluid. The experimental results showed that a higher head curve was obtained using XGS in the pump than using GS. The heads of the XGS that were computed using the viscoelastic turbulence model agreed well with the measured data. In contrast, the standard k-ε turbulence model failed to provide satisfactory predictions for the XGS. The computational results revealed that in most parts of the pump model flow fields, the Reynolds shear stress values and turbulent dissipation rates of the XGS were all lower than those of the GS. The hemolysis index of the pump model using the XGS was calculated to be only one-third of that using the GS.
Fluid Machinery Institute, School of Energy and Power Engineering, Xi'an Jiaotong University, People's Republic of China.
Qi-Hui
QH
Hu
Jing-Yin
JY
Li
Ming-Yuan
MY
Zhang
D001243:Assisted Circulation; D001783:Blood Flow Velocity; D003198:Computer Simulation; D004548:Elasticity; D004867:Equipment Design; D005990:Glycerol / Q000737:chemistry; D006353:Heart-Assist Devices; D006801:Humans; D007700:Kinetics; D008955:Models, Cardiovascular; D008962:Models, Theoretical; D012212:Rheology; D013314:Stress, Mechanical; D014783:Viscosity
D005990:Glycerol