APPARATUS FOR VISUALLY DISPLAYING FLUID DENSITY IN FLUID FLOW MODEL

摘要

The flow field to be visualised is produced in a tank (1) into which aerated water is bubbled through the tank bottom, the tank overflowing through a discharge (6). An orifice (9) in a flow line (13a) connects with a water spurting inlet (7a) of the tank to introduce fine air bubbles (4) in the rising water flow in the tank. A slit (5) provides a beam of light which irradiates the field of flow and light is reflected irregularly by the air bubbles. A colour image simulation system produces a picture image input made up of brightness signals which are separated into red, green and blue colour signals by a separator. A cut-off device acts to cut-off, at a selected brightness level, one of the three colour signals to provide colour signals representing brightness ranges which are known to differ one from another. The display device provides a colour image as a composite of the resulting signals.