Flow birefringence in axisymmetric geometries

摘要: Flow birefringence has become increasingly popular as a tool in non‐Newtonian fluid mechanics, where it provides means of measuring stress distributions complex polymer flows. In order to access wider range kinematic complexity the testing constitutive models, we explore application flow axisymmetric geometries. Unlike traditional applications two‐dimensional flows, there is no direct relationship between measured optical properties and stresses material. Rather, reflect cumulative effect refractive index (and hence stress) tensor on polarization state light. Since typical goal studies comparison experiment computation, propose that property could serve basis for rather than attempting invert data yield radial distributions. limit small total retardance, are partic...