Welcome to the cavitation and bubbly flow group!

  • quad vortex
    Quad vortex type closure of a ventilated supercavity
  • Internal flow visualization
    Visualization of ventilated supercavity through fog particles
  • ventilated supercavity in unsteady flow
    Ventilated supercavitation under wavy state in unsteady flow
  • gas jet supercavity during unstable state
    A gas jet ventilated supercavity (GJVS) under unstable state
  • Hologram movie of bubbly flow
    Measurement of bubbly flow using digital inline holography
  • supercavity control using control surfaces
    Fin control of ventilated supercavity
  • two branch cavity
    Two branch type of ventilated partial cavity with a back-facing setup
Cavitation occurs in a variety of hydrodynamic applications. These applications include, but are not limited to, hydraulic pumps and motors, hydrofoils, propellors and spillways. For many applications, cavitation has negative effects. Many manufacturers take great efforts to reduce or eliminate cavitation. Cavitation can alter the performance of a hydraulic system (reduction in lift and increase in drag for a hydrofoil, decrease in turbomachinery efficiency, reduced capacity to evacuate water in spillways, unwanted noise, etc.). However, cavitation has been advantageously employed in certain other applications, such as the homogenization of milk, cleaning of surfaces by cavitating jets and drag reduction by means of supercavitation. Our group focuses on the investigation of fundamental flow physics involved in cavitation phenomenon and bubbly flows through novel flow imaging and measurement techniques. 

Contact

Email: jhong@umn.edu
Office Phone: 612-626-4562
Offices: ME 233 & SAFL 381
Labs: SAFL water tunnel

Recent News

5/2018: Researchers from Beijing Institute of Science and Technology, Zhejiang University and Norway visited water tunnel lab.

12/2017: Our paper on gas jet supercavitation is selected as the Editor's Pick in Physics of Fluids!

10/2017: Shijie Qin joined group as a visiting PhD student.