Combined Radiative Transfer and Dynamic Light Scattering Technique for Characterization of Dense Liquid/Particle Suspensions: REU Supplement

这项研究将测量平均和时间相关的光 折射率为100%的粒子的稠密悬浮体的散射 索引可以大于、等于或小于 悬浮液的折射率， 温度 这允许检查单个悬架 具有来自透明或“单个”的固定动态特性 从“散射”状态到不透明或多重散射状态。 因此，它提供了一个独特的机会， 光散射理论处理中使用的假设 稠密悬浮液，特别是扩散波理论， 动态光散射 散射理论将是 从辐射传输的角度来看。 浓缩悬浮液在各种应用中都会遇到。 工程应用，包括油漆、泥浆、流化 床和陶瓷前体。 非侵入式光学技术 产品表征和控制所需的 处理这些悬浮液。

This research will measure average and time correlated light scattering from dense suspensions of particles whose refractive index can be made larger than, equal to, or smaller than the refractive index of the suspending fluid with modest changes of temperature. This permits examination of a single suspension having fixed dynamic properties from the transparent or "single scattering" regime to the opaque or multiple scattering regime. It thereby offers a unique opportunity to evaluate critically assumptions used in theoretical treatments of light scattering in dense suspension, in particular the diffusive wave theory for dynamic light scattering. A theory for scattering will be developed from the radiative transport point of view. Concentrated suspensions are encountered in a variety of engineering applications including paints, slurries, fluidized beds, and ceramics precursors. Non-intrusive optical techniques are needed for product characterization and control in the processing of such suspensions.