What is the ultimate capability of acoustophoretic volumetric displays?
What is the ultimate capability of acoustophoretic volumetric displays?
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DOI：
10.1063/5.0008351
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发表时间：
2020-06-15
影响因子：
4
通讯作者：
Hill, Thomas L.
中科院分区：
文献类型：
--
作者：
Fushimi, Tatsuki;Drinkwater, Bruce W.;Hill, Thomas L.
声泳的进步已经允许最近开发出称为声泳体显示器（AVD）的自由空间体显示器，其可以在没有障碍物的情况下呈现可观察到的3D图形。当前一代的AVD可以实时渲染简单的矢量图形，但更大和更复杂的图形需要10秒或更长的时间来渲染。在这里，我们提出了一个AVD的通用模型，并使用它来了解其性能限制;特别是，我们回答了多大的显示器（1：1光栅屏幕）可以创建的问题。我们发现，AVD性能的影响的大小和性质的颗粒，沿着与周围的流体的粘度。当粘性阻力和惯性力相对于声辐射力最小化时，实现最佳性能。我们的模型表明，对于膨胀聚苯乙烯颗粒（ρ = 19 kgm- 3），可以在10 Hz下以20 kHz的声频和25 kPa的声压幅度呈现高达117 mm × 117 mm的屏幕尺寸。
Advances in acoustophoresis have allowed the recent development of a free-space volumetric display called an Acoustophoretic Volumetric Display (AVD) that can render 3D graphics observable without obstructions. The current generation of AVD can render simple vector graphics in real-time, but larger and complex graphics require 10s or more to render. Here, we present a generalized model of an AVD and use this to understand its performance limits; in particular, we answer the question of how large a display (1:1 raster screen) can be created. We show that AVD performance is affected by the size and properties of the particle, along with the viscosity of the surrounding fluid. Optimal performance is achieved when the viscous drag force and inertial force are minimized relative to the acoustic radiation force. Our model suggests that, for expanded polystyrene particles (rho p = 19kgm- 3), a screen size of up to 117mm by 117mm can be rendered at 10Hz with an acoustic frequency of 20kHz and an acoustic pressure amplitude of 25kPa.