FlowMaster Advanced PIV / PTV Systems for Quantitative Flow Field Analysis

LaVision’s pioneering innovations LaVision is the leading supplier of laser imaging systems for a wide range of scientific fields such as fluid mechanics (aerodynamics, microfluidics), combustion (automotive, power generation) as well as spray and particle diagnostics (engines, pharma). Non-intrusive in nature, optical instruments offer unique capabilities for multi-parameter flow measurements with high spatial and temporal resolution. Our measurement equipment is used in well-known R&D labs all over the world. Largely customer oriented, we offer user-friendly, reliable and high quality products....

Integrated turn-key systems with unique measurement capabilities LaVision has designed the FlowMaster system family, a highly flexible and powerful Particle Image Velocimetry (PIV) system. It is based on our extensive experience and our tradition of technical communication with our customers. With components including continuous wave and pulse lasers, high-speed and sCMOS cameras, all of them conveniently controlled with a precise timing unit, a FlowMaster system can be adapted to a wide range of measurement demands in all fields of fluid dynamics. In a FlowMaster system, algorithms and hardware...

Working Principles Planar PIV (2D2C) Basic principle of 2D cross correlation planar PIV The FlowMaster system family is designed to measure instantaneous 2D- and 3D-velocity fields using the well-established Particle Image Velocimetry (PIV) technique. The flow is seeded with small particles which follow the flow. For planar PIV, the particles are illuminated by a thin (laser) light sheet, and the light intensity scattered by the tracer particles is recorded by one or more cameras. flow direction sheet optic double pulse Nd:YAG laser light sheet camera For a single velocity snap-shot, the light...

Stereoscopic PIV (2D3C) Principle of Stereoscopic PIV With FlowMaster Stereo-PIV, all three velocity components (u,v,w) in a light sheet are measured (2D3C). It is based on the principle of stereoscopic imaging: two cameras capture the image of the illuminated tracer particles from different angles. Scheimpflug lens arrangements keep all areas of the measurement planes in focus. An initial calibration procedure viewing a (dual-level) calibration plate, typically at the position of the light sheet, computes the mapping functions between measurement volume and camera images. Often some misalignment...

Tomographic PIV (3D3C/4D3C) Principle of Tomographic PIV Tomographic PIV[9] extends the stereoscopic approach to the third dimension. From the recordings by multiple cameras, all three velocity components in a volumetric flow field become accessible (3D3C). At least two cameras record the light scattered by particles in the illuminated measurement volume. A tomographic reconstruction algorithm using the Multiplicative Algebraic Reconstruction Technique (MART) reconstructs the 3D light intensity distribution. 3D cross correlation of interrogation volumes recorded at different instants in time...

Lagrangian Particle Tracking Lagrangian Particle Tracking: Shake-the-Box Shake-the-Box[16] is the most advanced 4D Lagrangian Particle Tracking Velocimetry (PTV) technique. With a hardware compatible to FlowMaster time-resolved Tomographic PIV setups, it retrieves particle tracks even for flows as densely seeded as in Tomographic PIV recordings. Shake-the-Box combines iterative particle reconstruction[17] with the information of particles moving in time. Besides the unsurpassed precision for velocity and acceleration data of particle tracks, the speed increase with Shake-the-Box is a factor of...

DaVis – Data Acquisition and Visualization Innovative flow field analysis for PIV / PTV LaVision’s Data acquisition and Visualisation software package (DaVis) combines fully integrated hardware control and high-end algorithms with a modern user interface with interactive control and live feedback. DaVis is the ideal tool of choice for PIV and PTV applications. Timing control of all hardware components A convenient access to the synchronization of FlowMaster hardware components is assured by the programmable timing unit (PTU). 4multi-camera support 4support for double-frame and time-resolved image...

Software Features Vortex ring in a Vector field validation 4time or space-based image filtering algorithms selectable 4correlation peak height ratio filter 4local and regional median filter including replacement with second, third and fourth choice vectors 4global vector magnitude filter 4time and/or spatial smoothing and interpolation Processing with direct and result incl feedback showing source uding velocity uncertainty Velocity after PIV auto masking Velocity scatte Data visualization 4DaVis 10 offers new powerful display options 4export to Tecplot® 4import and export module of DaVis format...

Wide range of aero- and hydrodynamic flow applications FlowMaster has been successfully used to investigate a wide range of flow phenomena in science and engineering including biological and medical applications ranging from large-scale or full-scale down to micrometer scales. Planar and volumetric FlowMaster can be applied to gaseous and liquid flows and even to multiphase or reactive flows like in combustion. 0.15 velocity magnitude [m/s] Microscopic PIV 4xyz-motorization of microscope 4easy planning and repetition of measurement positions 4light delivered to the microscope via an optical fiber...

Underwater PIV Underwater PIV systems are typically used in towing tanks or cavitation tunnels. Modular submarine housings of stainless steel have been optimized by CFD simulations and underwater experiments. Hydrofoil enclosures stiffen the vertical support tubes of the torpedoes to minimize wake and drag. Reliable PIV measurements are possible even at high towing speeds. The system is complemented with LaVision’s patented self-calibration routines. 4remote control of camera lenses, Scheimpflug adapters Stereo-PIV system in a towing tank, courtesy G. Jacobi, TU Delft[21] 0.0 z-displacement [mm]...