In the carotid artery different fluid models-Newtonian and Non-Newtonian models are applied to observe the various fluid parameters . Does changing these models affect the von-Mises criterion used in arterial wall rupture or is von-Mises criterion independent of the fluid rheology models.
I do not believe so since the stresses acting normal to the surface differ depending on the fluid model and hence the von-Mises stress calculated in each instance should have a variation.
I wish to know how well this observation holds for a low stenosed carotid artery and what degree of fluctuation should I anticipate while using a Carreau Model or any other visco-elastic model
Based on what you wrote I assume that when deciding whether the arterial wall is going to rupture you compare the equivalent tensile stress with some critical stress value. It seems to me that the model of rupture and models of fluid are independent: they describe the behaviour of different media (arterial wall vs. blood). As far as I understand, If we vary fluid models, it won't affect the criterion itself, because it will still be a comparison of the equivalent tensile stress vs. a critical value. The actual value of the equivalent tensile stress, on the other hand, will definetely be affected.
I would guess that one way to find out what kind of range of equivalent tensile stresses will be expirienced by the artery wall is to perform a parameter study: calculating the equivalent tesile stress for different combinations of fluid models and their parameters on one hand and mechanical models of the artery wall and their parameters on the other.
- Badges
- Science topic
- Similar topics
- Engineering
- Thermal Engineering
- Thermofluid
- Fluid Mechanics
- Fluid Dynamics