SOLUTION SHEETLIF System for Mixing and Scalar Transport
Planar-LIF solutions for liquid applications

Concentration and temperature imaging for liquid mixing studies
Our planar Laser Induced Fluorescence (LIF) systems for diagnostics of mixing and scalartransport in liquids are specially designed to handle whole-field concentration or temperature
measurements which can be synchronized with simultaneous velocity measurements
if desired. In addition to DynamicStudio’s powerful capabilities for image acquisitionand visualization, the mixing LIF software enables the user to easily process images offluorescence and extract statistics, Reynolds fluxes and other information from the images fora better understanding of the process investigated.

Key benefits•

Non-intrusive imaging technique for studies of liquid mixing phenomena•

Wide range of high-sensitivity cameras•

Complete software platform for system setup, data acquisition, data analysis andvisualization of results•

Dedicated software for concentration and temperature calibration and processing•

Fully compatible with Dantec Dynamics’ PIV systems for combined, multi-parametermeasurements

The liquid LIF solutions in briefDantec Dynamics’ planar-LIF solution for concentration or temperature
measurements in liquids makes challenging measurement tasks simple. It iscomprised of an Nd:YAG laser with light-sheet optics, a camera equipped with theappropriate lens and detection filter, electronics for hardware synchronization andanalogue sampling devices. In addition, the software offers data acquisition, datavisualization and straightforward image processing with built-in calibration capability,
robust analysis methods and full import/export functionality.

Overview of the different components, timing and data flow.
Laser light sources
Concentration and temperature planar-LIF measurements are carried out using
Nd:YAG lasers, available in a variety of repetition rates and energy outputs. Withsimple setup and operation, the light-sheet optics give you freedom to adjust thethickness and divergence angle of your sheet for greater experimental flexibility.
For your special, optically-demanding measurements, Dantec Dynamics has designed
light-guiding systems to enable measurements without compromising safety:•••Light guide arm for measurements in confined systems
Underwater illumination opticsEndoscope

Cameras and lenses
Dantec Dynamics offers a range of cameras with various pixel resolution, lightsensitivity and image bit-coding characteristics:•The FlowSense EO series is comprised of several models with high performanceat an affordable price. Offering a wide range of sensor resolutions up to 29 MP,
the FlowSense EO series cameras can accommodate most planar-LIF applicationin liquids.

•The HiSense Zyla camera combines high resolution and high sensitivity. 		
Featuring exceptionally good signal to noise ratios, this camera is especiallywell-suited for low light intensity measurements. Combined with its 12/16 bit
dynamic range, the HiSense Zyla camera is an excellent choice for all intensitybased measurements.

Pixel binning and active sensor size definition are available on each type of camera,so the frame rate can be increased if required. Additionally, a wide selection oflenses is available to optimize the magnification and field-of-view (FoV) for eachmeasurement.
Performance Synchronizer
The Performance Synchronizer ensures that all devices perform their individual tasks
at the correct time. The device is a powerful tool for handling not only the image
acquisition, but also the simultaneous synchronization and timing of other sensors or
external devices in the experimental/industrial setup.
The Performance Synchronizer is integrated into the DynamicStudio imaging
software platform for easy setup and configuration, and comes with both USB andEthernet communication.

Page 2High performance synchronizer

The use of the Ethernet interface makes it possible to place the synchronizer
near the experiment and the PC in a control room at some distance. Main
devices are auto-detected, which ensures that the user will not have toenter any specific properties for the system. The connectivity diagram in thesoftware shows how to properly connect the synchronization cables.
The Performance Synchronizer provides the option for analog signal sampling.
The analog sample can be the temperature from a sensor (e.g. during
temperature planar-LIF calibration), a reference velocity (e.g. from a CTA probe
during synchronised PIV/planar-LIF measurements), or simply the energyof each laser pulse using our laser Pulse Energy Monitor. The signal may besampled with or without a user-defined delay relative to the laser flashes.

Starter kits “Dye & Filter” for liquid mixing applications
In addition to the system hardware, two starter kits are available, containing
consumables and minor components that come in handy for making
experiments in liquids. The kits include:•

The fluorescent marker (powder) dedicated to your needs (concentration ortemperature measurements according to the type of laser used)•

A well-documented information booklet on the chemical and spectral 		properties of the dye purchased (and others you may use in the future)•A risk and safety handbook to help you handle your compounds 			appropriately•

A long-pass filter to mount on the camera lens, blocking any scattered laser
light and transmitting the fluorescence from the dye

User-friendly imaging software platform - Straightforward data analysis
The image acquisition system is based on DynamicStudio, a comprehensive
and user-friendly software platform for imaging applications. It features anadvanced plug-and-play-based distributed system, making it easy for theuser to maintain full control over the hardware for image acquisition. Dataacquisition and analysis are supported within the same software, so there is noneed to export the data for continuing with the analysis.
With easy access to numerous numerical methods, along with quick andaccurate calibration and processing methods, users will experience thebenefits of working with a truly integrated solution. And with the intuitive
interface, only a few clicks are required to acquire planar-LIF or synchronized
PIV/planar-LIF experimental data. The mixing LIF software features robust andinteractive methods for:•Calibration with respect to concentration or temperature measurements 		
alone; or concentration (or temperature) with multiple laser energy levels(bimodal calibration routines)•Processing raw images directly using the calibration defined previously•

Statistics on LIF images and scalar maps•

Reynolds flux•

Post-processing routines•

Combining LIF and PIV results if applicableAs a part of the main package of DynamicStudio, the Image Processing Library(IPL) software extends image analysis possibilities. A variety of numericalmethods offer quick access to image enhancement, filtering and advanced
numerical processing.
Page 3The user-friendly calibration
sequence provides full ontrol over
the LIF operating parameters,
linear regime range and laser
energy levels.

Boosting analysis capabilities with analysis sequences and MATLAB® LinkThe data analysis is further strengthened by the ability to define analysis
sequences and perform batch processing; this significantly speeds up
the process of working with large data sets. And with the MATLAB Link inDynamicStudio, you can tailor your analysis by calling up custom MATLAB
scripts directly from DynamicStudio, allowing you to process the data directlyin the database without the need to first export the data.

Processed and post-processed images (average and rms) of PIV/planar-LIF
measurements are used to determine Reynolds flux (u’c’, v’c’) vector map in aturbulent water jet in a cross-flow.

Options
Dedicated imaging optics for synchronized PIV/planar-LIF measurements
For advanced mixing studies, LIF can be combined with PIV; e.g. when
Rhodamine B dye is excited by the same Nd:YAG double-pulsed laser used aslight source for the PIV technique.
Dual-camera mount (two cameras)
Save precious time when aligning two cameras to view the same area of theflow by using Dantec Dynamics’ Dual-camera mount in combination with thenumerically robust methods of the planar-LIF software. In DynamicStudio,
the user can apply the same operation (region of interest selection, zoom in/out, image browse, etc.) to both images acquired. Calibration functions within
DynamicStudio can also be applied directly.
Page 4

The Dual Camera Mount, with
two SpeedSense VEO cameras.

Cost effective solution using DualScope (single camera)
DualScope is an optical splitting system that allows simultaneous acquisitionof two spatially identical but spectrally separated images simultaneously withthe use of only one single camera. With this unit, combined LIF and PIV canbe carried out with only a single camera, which reduces both the cost and thecomplexity of the measurement.
The optics of DualScope are optimized to help imaging overlapping andminimize parallax distortion. Dedicated filters for LIF and PIV (with standard
thread for camera lenses) can be mounted directly onto the DualScope.
Pulse Energy Monitor
A proven method of reaching higher accuracy is to measure the laser’s pulseto-pulse fluctuations by means of a Pulse Energy Monitor and subsequently
compensate for this during LIF image analysis. The Pulse Energy Monitor ismounted between the laser output and the light-sheet optics.

The DualScope for acquisition of
two spectrally separated filteredimages with one camera.

Product overview
Application
Single shot		
measurements				Time resolved measurements
in low to medium speed waterflows

Time resolved measurements
in high speed water flows

Sampling rate

10-15 Hz50-200 Hz			1 kHz		

Laser reprate [Hz]10		50				1000

Camera series		

FlowSense EO
HiSense ZylaFlowSense CX			SpeedSense VEO, VEO E

Camera		accessories
Lenses, Filters, Dual Camera Mount, DualScope
SoftwareDynamicStudio: Base Package, Liquid and Gas LIF Add-on

Timing

Performance Synchronizer

PC / Workstations Performance PC for 1 camera imaging system		

High Performance Imaging PC for a 2-cam imaging system		Performance Imaging Streaming Workstation For 2-cam imaging streaming

Starter kits

Starter kit for Concentration - Includes dye (25 g) and camera filter		Starter kit for Temperature - Includes dye (25 g) and camera filter

Data Sheet 0561_v1. Subject to change without notice. Copyright © 2019.
Dantec Dynamics. All Rights Reserved. www.dantecdynamics.com