background: aneurysm is a blood-filled bulge in the wall of vessels that occurred in abdominal aortic and cerebral vessels. the dilation of artery leads to aneurysm. methods: three dimensional modelling was utilized for a patient with cerebral aneurysm and a normal subject, and additional fluid-structural interaction simulation was performed. we consider pulsatile blood velocity as inlet, and b...

With the development of intelligent control and modern communication technology, Unmanned Surface Vessel (USV) will soon become another important unmanned platform after drones vehicles. vessel are easily disturbed by wind, waves currents during navigation. Solving problem vessel's course keeping navigation has one key technologies in research vessel. Aiming at navigation, this paper firstly ca...

background: recent pre-clinical and clinical studies indicate that irradiation in the dose range of 15 to 30 gy can reduce rate of restenosis in patients who have undergone an angioplasty. the use of filled balloon with radioactive solution was proposed as one of the possible intravascular irradiation techniques. materials and methods: the monte carlo n-particle transport code (mcnp4b) was used...

A Monte Carlo simulation of light propagation through the retina has been developed to understand the path-length distributions within the retinal vessel. For full-field illumination, the path-length distribution within the vessel comprises directly backscattered light and light that has passed once or twice through the vessel. The origins of these light path-length distributions can be better ...

We present the computation of lagrangian-based flow characterization measures for time-dependent, deformable-wall, finite-element blood flow simulations. Applicability of the algorithm is demonstrated in a fluid-structure interaction simulation of blood flow through a total cavopulmonary connection (Fontan procedure), and results are compared with a rigid-vessel simulation. Specifically, we rep...

Providing suitable training for aspiring neurosurgeons is becoming more and more problematic. The increasing popularity of the endovascular treatment of intracranial aneurysms leads to a lack of simple surgical situations for clipping operations, leaving mainly the complex cases, which present even experienced surgeons with a challenge. To alleviate this situation, we have developed a training ...

Multiphysics simulation refers to the inclusion of multiple physical phenomena in a single computational model. This may or may not require multiple solvers. For example, a mechanical solver could be used to model stent deployment to a vessel wall, and then either a mechanical or computational fluid dynamics (CFD) solver could be used to model drug diffusion in the vessel tissue. In situations ...

A hybrid method for the simulation of Reynolds-averaged turbulent ̄ows in axial ̄ow impeller driven mixing vessels is described. The time-mean ̄ow in the impeller region is modelled using blade element theory, while the ̄ow in the remainder of the vessel is simulated using a second-order ®nite-volume Reynolds-averaged numerical scheme. The two models are iteratively coupled through boundary con...