Shear induced diffusion of platelets revisited

Shear induced diffusion of platelets revisited

Blog Article

The transport of platelets in blood is commonly assumed to obey an advection-diffusion equation with a diffusion constant given by the so-called Zydney-Colton theory.Here we reconsider this hypothesis based on experimental observations and numerical simulations including a fully resolved suspension of red radio birdman tshirt blood cells and platelets subject to a shear.We observe that the transport of platelets perpendicular to the flow can be characterized by a non-trivial distribution of velocities with and exponential decreasing bulk, followed by a power law tail.We conclude that such distribution of velocities leads to diffusion of platelets about two orders of magnitude higher than predicted by Zydney-Colton theory.

We tested this distribution with a minimal stochastic model of platelets deposition to cover space and time scales similar to our experimental results, and diegojavierfares.com confirm that the exponential-powerlaw distribution of velocities results in a coefficient of diffusion significantly larger than predicted by the Zydney-Colton theory.