TY - JOUR
T1 - Numerical simulation and comparative analysis of flow field in axial blood pumps
AU - Peng, Yuhua
AU - Wu, Yaqin
AU - Tang, Xiaoying
AU - Liu, Weifeng
AU - Chen, Duanduan
AU - Gao, Tianxin
AU - Xu, Yong
AU - Zeng, Yanjun
PY - 2014/5
Y1 - 2014/5
N2 - The objective study was to estimate the rheological properties and physiological compatibility of the blood pump by simulating the internal flow field of the blood pump. In this study we use computational fluid dynamics method to simulate and analyse two models of axial blood pumps with a three-blade diffuser and a six-blade diffuser, named pump I and pump II, respectively, and to compare the flow patterns of these two kinds of blood pumps while both of them satisfy the conditions of the normal human blood differential pressure and blood flow. Results indicate that (i) the high shear force occurs between the diffuser and the rotor in which the crucial place leads to haemolysis and (ii) under the condition of 100 mmHg pressure head and 5 l/min flow rate, the difference between the two kinds of blood pumps, as far as the haemolytic performance is concerned, is notable. The haemolysis index of the two pumps is 0.32% and 0.2%. In conclusion, the performance of the blood pump is influenced by the diffusers' blade number. Pump II performed better than pump I, which can be the basic model for blood pump option.
AB - The objective study was to estimate the rheological properties and physiological compatibility of the blood pump by simulating the internal flow field of the blood pump. In this study we use computational fluid dynamics method to simulate and analyse two models of axial blood pumps with a three-blade diffuser and a six-blade diffuser, named pump I and pump II, respectively, and to compare the flow patterns of these two kinds of blood pumps while both of them satisfy the conditions of the normal human blood differential pressure and blood flow. Results indicate that (i) the high shear force occurs between the diffuser and the rotor in which the crucial place leads to haemolysis and (ii) under the condition of 100 mmHg pressure head and 5 l/min flow rate, the difference between the two kinds of blood pumps, as far as the haemolytic performance is concerned, is notable. The haemolysis index of the two pumps is 0.32% and 0.2%. In conclusion, the performance of the blood pump is influenced by the diffusers' blade number. Pump II performed better than pump I, which can be the basic model for blood pump option.
KW - axial blood pump
KW - haemolysis index
KW - numerical simulation
KW - shear force distribution
UR - http://www.scopus.com/inward/record.url?scp=84896539368&partnerID=8YFLogxK
U2 - 10.1080/10255842.2012.715156
DO - 10.1080/10255842.2012.715156
M3 - Article
C2 - 22974125
AN - SCOPUS:84896539368
SN - 1025-5842
VL - 17
SP - 723
EP - 727
JO - Computer Methods in Biomechanics and Biomedical Engineering
JF - Computer Methods in Biomechanics and Biomedical Engineering
IS - 7
ER -