背景指向シュリーレン(BOS)法に基づく円柱周りのひも状ミセル水溶液流れにおける自由表面形状の非接触計測

抄録

Solid-like fragmentation of viscoelastic magma is an important factor in triggering explosive eruptions. This fragmentation occurs near the free surface of flowing magma. Therefore, we focused our attention on the fracturing phenomena that occur in the flow around a moving cylinder of a Maxwellian fluid, a wormlike micellar solution. The time variation of the free surface was measured by the fast checkerboard demodulation (FCD) method, a type of background-oriented Schlieren imaging. The results show that the curvature of the free surface just before fracture is similar for different diameters and moving speeds of the cylinder.