Many challenges in the design of modern ventilation systems can be overcome using CFD simulations – ranging from controlled ventilation of assembly rooms according to the current standards to extraction systems for harmful substances in industrial plants and to clean room technology.
Compliance with the comfort criteria in assembly rooms can be controlled and appropriate measures can be taken. Examples for the investigations may be the combination of turbulence and flow velocity for different temperatures, vertical temperature differences or sufficient air exchange. For the latter the local residence time is examined to gain better insight into the ventilation situation as by the estimation of the global exchange rate.
Much stricter criteria have to be met in operational rooms. The current standards define, inter alia, a low-turbulent uni-directional air-flow for sufficient protection against particles and germs. Flow visualization using smoke affects the flow, CFD does not. Thus CFD makes it possible to examine realistic contamination scenarios.
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