The interaction between the flow of a fluid and a solid mechanical part is a common, but often extremely complex, situation. While fluid dynamics looks only to flow, for example through CFD, and structural mechanics only looks to solids, for example via FEM/FEA, in the case of FSI, both is done. For example one could simulate the influence that the motion of a solid part has on a flow, or the influence a flow has on the deformation of- or force on a solid part. In those cases there is a one-way interaction (one phase influences the other, but not the other way around). One could also simulate a two way interaction, where the flow influences the shape or motion of a part, and the part, in turn, influences the flow. DEMCON Bunova possesses the computational capabilities and experience to perform numerically expensive, complex co-simulations with interaction between CFD and solid mechanics. Among others:
Flow induced vibrations
Flow induced vibrations, or vortex shedding, is caused when a flow passes along an object or sharp edge at high speed. These vibrations can have a disastrous effect on the object or flow, especially when the frequency of the vibration is close to one of the natural frequencies of the object or system. The preemptive mapping of the possible places where vortex shedding might take place, preferably in combination with determining the natural frequencies of the surrounding parts is therefor highly recommended. DEMCON Bunova has the experience and know how to advise in this area.
Mixing and separation
The efficient, and correct, mixing or separating different flows is for many processes of the utmost importance. While there is obviously a wide range of mixers and separation equipment available on the market, for many processes the best result can only be obtained by customization. Especially for processes that are very large scale, or particularly crucial in specifications, the conducting of a through problem analysis, if necessary supplemented with simulations, can prove to be highly beneficial.