Hosted by Harbin Engineering University
Time >>>2024.8.9~8.13
Location>>>Harbin●Huaqi Hotel
Highlights>>> Latest research progress in fluid mechanics, future trends in discipline development, and major scientific research needs
Revealer, Fluid Mechanics PIV Measurement System, All Software and Hardware are Innovatively Developed
Revealer's RFlow software is suitable for 2D2C, 2D3C, 3D3C, PTV and other application scenarios
Integrate the latest deep learning segmentation model and background segmentation technology
Support real-time analysis and display of velocity field
Support POD decomposition method to achieve time and space decoupling
Integrated PTV particle tracking algorithm
Possessing tomographic PIV technology to study complex flow field structures
Revealer's PIV high-speed camera, PIV ultra-clear camera
1280×1024 @25000fps, PIV frame interval 250ns
2560×1920 @2000fps, PIV frame interval 300ns
5120×4096 @36fps, PIV frame interval 200ns
Application Areas - Turbulence and Stability
High-speed cameras are space-time microscopes that magnify the time scale, observe flow patterns, identify laminar and turbulent areas, and capture transient sequence images of fluid flow for subsequent PIV particle image cross-correlation analysis. Observe the starting point and stability boundary of turbulence.
Based on particle image velocimetry technology, the captured transient sequence images are used to predict the occurrence of turbulence using direct numerical simulation DNS, Reynolds average simulation RANS, large eddy simulation LES and other methods. The flow velocity, velocity profile, and turbulence intensity in multiple vector directions are calculated to analyze its flow characteristics.
Application Areas - Hydrodynamics
Use the image on a single page
High-speed cameras can capture transient phenomena of water and liquids under changes in pressure and temperature, such as cavitation, stratified flow, wake flow, etc., collect sequential images of ∆ T time, and support image post-processing.
The PIV measurement software visualizes the velocity field and vortex structure of the measured object, cavitation flow underwater and during the process of entering and exiting the water, and the morphology and dynamic indicators of bubbles or droplets.
Application Areas - Micro-Nano Scale Flow
High-speed cameras capture micro- and nano-scale high-speed flow phenomena, such as the flow pattern of liquid film formed by micro-jets/droplets impacting each other, the generation and collapse of bubbles, and the high-speed mixing of two different fluids in microchannels.
Revealer's self-developed micro-piv system consists of a piv high-speed camera, light guide arm, laser, optical platform, customized optical path, and Rflow particle image velocimetry system software. It supports the measurement of microchannel flow velocity vector field, and the color cloud map visualizes kinematic parameters such as vorticity, rotation intensity, Q-criterion variable and structured vorticity.
Application field - multiphase flow and non-Newtonian fluid mechanics (use the pictures on a single page, 4 pictures are combined together, ask Jiaxin to help)
The exchange of mass, momentum and energy between phases at the interface is usually high-speed and complex. Revealer's ultra-high-speed camera helps to understand the phase transition mechanism by capturing transient motion processes at high speed and replaying characteristic phenomena at slow speed.
Integrating traditional piv technology and reconstruction technology, based on the multiplication algebra method, it can perform three-dimensional cross-correlation calculation on the reconstructed particle distribution at two adjacent moments, reconstruct the three-dimensional complex flow field of two-phase flow, fit velocity isosurfaces, and support the use of Q criterion to calculate vortex structure.
Application field - underwater explosion mechanics (directly use the picture on the single page, Jiaxin assists)
Capture transient phenomena such as shock waves, bubble generation, pulsation, and collapse generated by explosions.
Visually track the pulsation process of bubbles and support the measurement of bubble morphology and dynamic indicators.
Application field - Wind engineering and aerodynamics (directly use the picture on the single page, Jiaxin coordinates)
High-speed cameras are used to capture aerodynamic phenomena of moving objects under transonic and supersonic wind loads.
The high temporal and spatial resolution PIV system can calculate the velocity, turbulence intensity and other parameters of the airflow field of a moving object, and verify the accuracy of the computational fluid dynamics (CFD) simulation results.
Application field - heat dissipation fluid machinery
Capture transient phenomena such as thermal fluid-bubble generation and bubble collapse in heat dissipation fluid machinery, and observe and locate the inducing factors of bubble dynamic behavior such as jets.
Combined with high-speed camera technology, PIV can visualize the flow field inside fluid machinery and provide researchers with information on flow velocity, vortex, temperature, and density.
Revealer's PIV Fluid Measurement Laboratory (put 2 pictures in the single page)
Laboratory Introduction >>> Revealer's PIV Fluid Measurement Laboratory is one of the research and development bases built by Zhongke Shijie with reference to the standards of fluid mechanics laboratories of key domestic universities. It consists of wind tunnel experimental equipment, water tunnel experimental equipment, vortex field display and measurement teaching demonstration platform with airfoil/cylindrical bluff body, covering an area of 200m². The laboratory has a professional technical support team of more than 40 people, including 7 doctors, and provides system-level solutions based on high-speed photography, particle image velocimetry, and deep learning, which are open to researchers from universities and research institutes.
Wind Tunnel Introduction >>>DC suction wind tunnel design, experimental section size 0.25m×0.25m×0.7m, design wind speed range 4~50m/s, turbulence ≤0.7%, used in building load and flow field characteristics research, wind turbine aerodynamic characteristics research, atmospheric boundary layer characteristics research.
Water Tunnel Introduction >>>Vertical dynamic cycle design, experimental section size 1.2m×0.3m×0.3m, designed flow rate range 0.1m/s~5m/s, with variable frequency speed regulation function, used in visualization experiments in hydrodynamics, to study water cavitation, water elasticity, turbulent wake, fluid machinery and other hydrodynamic phenomena under low Reynolds number.
