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Primoz Ternik, Jure Marn
Numerical study of blood flow in stenotic artery
Appl. Rheol. 19:1 (2009) 13060 (11 pages)
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In the present study,we investigate the behaviour of the human blood in a stenosed blood vessel. The human blood is studied
as a Newtonian as well as non-Newtonian fluid. We consider three rheological models of the shear-thinning non-
Newtonian models and compare them with the Newtonian model. The blood flow through a stenosed blood vessel is studied
numerically by solving the three dimensional Navier-Stokes equation along with the continuity equation and particular
rheological model. Distribution of velocity, pressure,wall shear stresses and flow recirculation characteristics are determined
for two time steps of the cardiac cycle. Present results indicate a significant influence of the shear-thinning viscous behaviour
of a human blood on the most important hemodynamic parameters that play a key role in formation of atherosclerotic
plaques. Last but not least, a systematic grid refinement analysis as well as numerical accuracy study IS performed and present
numerical results may be treated as the benchmark.
► Cite this publication as follows:
Ternik P, Marn J: Numerical study of blood flow in stenotic artery, Appl. Rheol. 19 (2009) 13060.
Jure Marn, Primoz Ternik
Use of Quadratic Model for Modelling of Fly Ash-Water Mixture
Appl. Rheol. 13:6 (2003) 286-296
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Novel approach to rheological modelling of a fly ash-water mixture is proposed. The model is first tested against the available experimental data for a corn starch-water, a glass beads-water and a fly ash-water mixture and then used taking the advantage of available CFD code for a calculation of major and minor losses. Numerical results for Quadratic model are compared with results for Power law.
► Cite this publication as follows:
Marn J, Ternik P: Use of Quadratic Model for Modelling of Fly Ash-Water Mixture, Appl. Rheol. 13 (2003) 286.
J. Marn, M. Delic, Z. Zunic
Non-Newtonian Fluid Flow Analysis with Finite Difference and Finite Volume Numerical Models
Appl. Rheol. 11:6 (2001) 325-335
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Suitability of finite difference method and finite volume method for computation of incompressible non newtonian flow is analyzed. In addition, accuracy of numerical results depending of mesh size is assessed. Both methods are tested for driven cavity and compared to each other, to results from available literature and to results obtained using commercial code CFX 4.3.
► Cite this publication as follows:
Marn J, Delic M, Zunic Z: Non-Newtonian Fluid Flow Analysis with Finite Difference and Finite Volume Numerical Models, Appl. Rheol. 11 (2001) 325.
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