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Unsteady wall shear stress in a distensible tube
M Zagzoule1, J Khalid-Naciri, J Mauss
1Laboratoire de Mécanique, UFR-MIG, Université Paul Sabatier, Toulouse, France.
Journal of Biomechanics
|January 1, 1991
Abstract:
An asymptotic expression of the wall shear stress (WSS) in an elastic tube is deduced for small values of the Womersley parameter. In the case of a rigid tube this asymptotic expression is shown to compare better with the exact solution than Poiseuille's or Lambossy's approximations. Its integration in a one-dimensional model of the internal carotid artery blood flow predicts more marked systolic and less marked diastolic WSS than those predicted by the commonly used Poiseuille's approximation.