Many materials, such as paints, clay suspensions, concrete or inks, are complex fluids which present non-Newtonian
properties. To define their rheological properties and particularly for coarse suspensions (debris mud, sediments), we
need to develop specific devices because of the size of the particles within the fluid to reach the continuum assumption.
The study of the inclined plane flows can be a solution as soon as we are able to measure the evolution of the free
surface and the surface velocity during the flow. We have developed specific 3D measurements based on stereovision to
extract rheological properties of two materials flowing down an inclined flow. First a shear thinning fluid (a polyoxyde
ethylene solution) is used to validate the method which is then applied to a viscoplastic material (a bentonite
suspension). The comparison of the results with conventional measurements using a rheometer is in good agreement. 德国LaVision 表面PIV 德国LaVision PIV/PLIF粒子成像测速场仪 材料应变形变成像测量仪
在线留言
沪公网安备 31011502008050号
参与评论
登录后参与评论