Numerical Models for Exact Description of in-situ Digital In-Line Holography Experiments with Irregularly-Shaped Arbitrarily-Located Particles

Abstract

We present the development of a numerical simulator for digital in-line holography applications. In-line holograms of arbitrarily shaped and arbitrarily located objects are calculated using generalized Huygens-Fresnel integrals. The objects are 2D opaque or phase objects. The optical set-up is described by its optical transfer matrix. A wide variety of optical systems, involving windows, spherical or cylindrical lenses, can thus be taken into account. It makes the simulator applicable for design and description of in situ experiments. We discuss future applications of this simulator for detection of nanoparticles in droplets, or calibration of airborne instruments that detect and measure ice crystals in the atmosphere.

Pressure Study on Pipe Transportation Associated with Cemented Coal Gangue Fly-Ash Backfill Slurry

“…The slurry viscosity was defined with the Herschel-Bulkley model. In the pipe transportation, the slurry move forwards with the plunger shape with higher yield stress and larger slurry relative viscosity like the entire [28]. We used the figure of 1.71 Pa•s as the consistency index and Figure 1 as the power-law index while setting the yield stress threshold as 78.91 Pa.…”