TY - JOUR
T1 - Modeling of an erythrocyte by beads and springs and the numerical analysis of blood flow under the constant shear field
AU - Ishikawa, Takuji
AU - Kawabata, Nobuyoshi
AU - Tachibana, Motoyoshi
PY - 2000/10
Y1 - 2000/10
N2 - The blood flow in large arteries is commonly analyzed by means of the constitutive equations. However, it is not appropriate to use constitutive equations for small arteries because of the heterogeneity of the blood. In this paper, a new method to model an erythrocyte by using beads and springs is proposed as an alternative to analyze the blood flow. The behavior of a single erythrocyte is computed under a constant shear field. The rotating attitude of an erythrocyte, shear viscosity, normal stress difference coefficient and stress thinning are discussed. The results show that the bead-spring model appropriately can simulate the tank tread motion of an erythrocyte under a high shear field and stress thinning. It is therefore considered that the bead-spring erythrocyte model is able to consistently express blood characteristics.
AB - The blood flow in large arteries is commonly analyzed by means of the constitutive equations. However, it is not appropriate to use constitutive equations for small arteries because of the heterogeneity of the blood. In this paper, a new method to model an erythrocyte by using beads and springs is proposed as an alternative to analyze the blood flow. The behavior of a single erythrocyte is computed under a constant shear field. The rotating attitude of an erythrocyte, shear viscosity, normal stress difference coefficient and stress thinning are discussed. The results show that the bead-spring model appropriately can simulate the tank tread motion of an erythrocyte under a high shear field and stress thinning. It is therefore considered that the bead-spring erythrocyte model is able to consistently express blood characteristics.
KW - Bio-fluid mechanics
KW - Erythrocyte
KW - Non-newtonian fluid
KW - Numerical analysis
KW - Shear flow
KW - Viscoelastic fluid
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U2 - 10.1299/kikaib.66.650_2642
DO - 10.1299/kikaib.66.650_2642
M3 - Article
AN - SCOPUS:33748327161
SN - 0387-5016
VL - 66
SP - 2642
EP - 2649
JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
IS - 650
ER -