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流体的对流可借助于能揭示流体三维运动的全息装置来进行研究。该装置能消除固定颗粒(例如在窗口和透镜上的灰尘)的象,这些象可能掩盖流体运动粒子的特性。全息流量计记录有意引进流体中“微球”粒子的多次曝光全息象。流体中流线的速度和方向可通过测量一个微球粒子再现象间的距离,并除以两次曝光间的时间来求得。全息装置是为零重力条件下对流体对流池而建立起来的。其原理可用来研究各种流动过程,例如,电化学喷镀和汽车引擎中的燃烧。
Convection of fluids can be studied by means of holographic devices that reveal the three-dimensional motion of the fluid. The device removes images of fixed particles (such as dust on windows and lenses) that may mask the properties of fluid moving particles. Holographic flowmeters record multiple exposure holograms with the intention of introducing “microspheres” particles in the fluid. The velocity and direction of the streamline in the fluid can be determined by measuring the distance between the reappearance of a microsphere particle and dividing it by the time between exposures. The holographic device is built for fluid convection cells under zero gravity conditions. The principle can be used to study various flow processes, for example, electrochemical plating and combustion in a car engine.