Periodic compression and cavitation induced shear between steam-water two-phase flows for bio-materials degradation

Abstract

Steam–water-induced shear has multiple applications. Steam–water layers-induced periodic shear as a consequence of compression and cavitation has been investigated here. On an experimental basis, CCD-based shadowgraphy along with pressure sensor and laser Doppler anemometry has been applied to measure the spatial extent of compression–cavitation and shear. The superior impact has been found to be imparted due to rotational speed on transverse pressure and velocity as compared to the influence due to the inlet pressure of steam. A constructive coupling has been found between the operating parameters, which has shown the significance of the order of application of the operating parameters. Vertical velocity and pressure trends within the region of interest have been computed numerically. The extent of positive buoyancy, as well as the swirl intensification strength, has been measured using analytical approaches. It has been found that rotational speed has more potential to induce shear among steam–water two-phase flows, followed by the inlet pressure of steam/water and compressibility. It has also been found that the effectiveness of the manufactured experimental facility in terms of material degradation ranges from 22 to 45% under the influence of the operating parameters.