Particle image velocimetry (PIV) tracking of flow of foamed gypsum slurry under a roller

IF 2.5 3区工程技术 Q2 ENGINEERING, MECHANICAL

Experiments in Fluids Pub Date : 2025-07-18 DOI:10.1007/s00348-025-04076-z

Yong Il Kim, David Podstawski, Caesar Sanchez, Jerry Westerweel, Alexander L. Yarin

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Abstract

Measurement of three-dimensional velocity field of an opaque material (foamed gypsum slurry) flowing under a roller is explored using a PIV surface-tracking technique employoing two types of software. The foamed slurry was deposited on a moving belt pulling it under a rotating roller. The case of the water-to-stucco ratio (WSR) of 75 was studied at 0.19 wt%, and 1.86 wt% of foam added. The cases of roller co-rotation with the belt, no rotation, and counter-rotation were explored. The effect of the added foam on widening of the slurry layer on a roller was also studied. Particle Image Velocimetry (PIV) was used to measure the surface velocity flow field in both top and side views. A significant rejection flow of slurry before the roller was observed in some cases, with its severity varying with the roller’s rotating direction, its angular speed, as well as the foam content. One of the main aims of the present work is in the comparison of two PIV software: PIVlab (Matlab source, Germany) and PIVware (provided by TUDelft).

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颗粒图像测速法（PIV）跟踪泡沫石膏浆在滚筒下的流动

采用PIV表面跟踪技术，利用两种软件对不透明材料（泡沫石膏浆）在滚轮下流动的三维速度场进行了测量。泡沫浆料沉积在移动带上，在旋转滚筒下拉动。研究了在0.19 wt%，泡沫1.86 wt%的情况下，水灰比（WSR）为75的情况。探讨了辊筒与皮带共转、不转、反转三种情况。研究了添加泡沫对辊筒浆层加宽的影响。采用粒子图像测速技术（PIV）测量了顶部和侧面的表面速度流场。在某些情况下，观察到在滚轮之前有明显的浆料排斥流，其严重程度随滚轮的旋转方向，角速度以及泡沫含量而变化。本工作的主要目的之一是比较两种PIV软件：PIVlab （Matlab源代码，德国）和PIVware（由TUDelft提供）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Experiments in Fluids 工程技术-工程：机械

CiteScore

5.10

自引率

12.50%

发文量

157

审稿时长

3.8 months

期刊介绍： Experiments in Fluids examines the advancement, extension, and improvement of new techniques of flow measurement. The journal also publishes contributions that employ existing experimental techniques to gain an understanding of the underlying flow physics in the areas of turbulence, aerodynamics, hydrodynamics, convective heat transfer, combustion, turbomachinery, multi-phase flows, and chemical, biological and geological flows. In addition, readers will find papers that report on investigations combining experimental and analytical/numerical approaches.