While FSI offers better analysis, it comes at a cost of highly increased computational time. This is significant because incorrect modeling of aneurysms could lead to doctors deciding to perform invasive surgery on patients who were not at a high risk of rupture. FSI models contain an overall lower WSS compared to non-compliant models.

If the aneurysmal wall becomes weak enough, it becomes at risk of rupturing when WSS becomes too high. The neck of an aneurysm is the most susceptible to changes in to WSS. It has become common practice to use computational fluid dynamics to analyze patient specific models. This effect is especially imperative to take into account when analyzing aneurysms. Failure to take into account this property of blood vessels can lead to a significant overestimation of resulting wall shear stress (WSS). Blood vessels act as compliant tubes that change size dynamically when there are changes to blood pressure and velocity of flow. įluid–structure interactions also play a major role in appropriate modeling of blood flow. In addition to pressure-driven effects, FSI can also have a large influence on surface temperatures on supersonic and hypersonic vehicles. Space Shuttle main engine (SSME), where FSI can lead to considerable unsteady side loads on the nozzle structure.

Another prominent example is the start up of a rocket engine, e.g. Fluid–structure interactions also occur in moving containers, where liquid oscillations due to the container motion impose substantial magnitudes of forces and moments to the container structure that affect the stability of the container transport system in a highly adverse manner. The lubricant flows between the contacting solid components and causes elastic deformation in them during this process. The interaction between tribological machine components, such as bearings and gears, and lubricant is also an example of FSI.

The act of ' blowing a raspberry' is another such example. The dynamic of reed valves used in two strokes engines and compressors is governed by FSI. A reed actually produces sound because the system of equations governing its dynamics has oscillatory solutions. Aircraft wings and turbine blades can break due to FSI oscillations. Tacoma Narrows Bridge (1940), the first Tacoma Narrows Bridge, is probably one of the most infamous examples of large-scale failure. Failing to consider the effects of oscillatory interactions can be catastrophic, especially in structures comprising materials susceptible to fatigue. automobile, aircraft, spacecraft, engines and bridges. Propagation of a pressure wave through an incompressible fluid in a flexible tube Examples įluid–structure interactions are a crucial consideration in the design of many engineering systems, e.g.

Abaqus sph fsi