Abstract Sheet and cloud cavitation involve the formation of large-scale cavities microbubbles across a wide range length scales. In this study, two-way coupling Eulerian-Lagrangian algorithm was utilized to simulate cavitating flow around NACA66 hydrofoil at an incidence 8 degrees number 1.2. The large eddy simulation (LES) volume fraction (VOF) methods are used capture scale vapor structures ...

The dynamics of cloud cavitation about a three-dimensional hydrofoil are investigated experimentally in tunnel with depleted, sparse and abundant free-stream nuclei populations. A rectangular planform, NACA 0015 was tested at Reynolds number $1.4\times 10^{6}$ , an incidence $6^{\circ }$ range numbers from single-phase flow to supercavitation. High-speed photographs shedding phenomena were acqu...

In numerous industries such as drilling, peening, cleaning, etc., a cavitating jet is adopted. However, it challenging to simulate the flow field numerically with accuracy. The of organ pipe cavitation nozzle simulated in this research using RNG k−ε, DES, and LES turbulence models. model can more accurately predict periodic shedding cloud, which basically consistent morphology captured high−spe...

The present paper deals with a feasibility study of a new cavitation measurement method developed at the Chair of Fluid Systems Technologies (TU Darmstadt). The measurement principle is based on the piezoelectric attributes of a thin PVDF-membrane. The eigenfrequency of the membrane in the range of GHz in combination with a special sampling concept by means of an electrode matrix enable the mea...

There are an increasing number of biological and bioengineering contexts in which cavitation is either utilized to create some desired effect or occurs as a byproduct of some other process. In this review an attempt will be made to describe a cross-section of these cavitation phenomena. In the byproduct category we describe some of the cavitation generated by head injuries and in artifical hear...

We quantify uncertainties in the location and magnitude of extreme pressure spots revealed from large scale multi-phase flow simulations of cloud cavitation collapse. We examine clouds containing 500 cavities and quantify uncertainties related to their initial spatial arrangement. The resulting 2000-dimensional space is sampled using a non-intrusive and computationally efficient Multi-Level Mon...

High-speed movies are taken when bubbles grow at gold surfaces heated spotwise with a near-infrared laser beam heating water below the boiling point (60-70 °C) with heating powers spanning the range from very low to so high that water fails to rewet the surface after bubbles detach. Roughly half the bubbles are conventional: They grow symmetrically through evaporation until buoyancy lifts them ...