Instrumentation
Coanda is constantly acquiring, optimizing, and developing new measurement techniques for application to single phase flows, multi-phase flows (gas-liquid, gas-solid, liquid-solid and gas-liquid-solid), as well as non-Newtonian single and multi-phase flows. Some of the key measurement technologies available at Coanda include:
Laser Doppler Velocimetry (LDV) - LDV is an optical, non-intrusive technique for measuring point velocities in gas or liquid flows. Coanda currently has a two component TSI system powered by a 10 watt argon-ion laser.
Phase Doppler Interferometer (PDI) - Coanda's PDI system (Artium Technologies) is capable of measuring droplet size, volumetric flux, and two components of velocity. This technology is able to perform reliable and accurate characterizations of spray nozzles and aerosol dynamics.
Constant Temperature Anemometry (CTA) - Also referred to as Hot Wire Anemometry, this system is used for measurement of one, two or three velocity components in either gas or liquid applications. In comparison to an LDV system, a CTA system can acquire data at a much higher rate.
Particle Size Distribution - Coanda can offer both mechanical and optical particle size distribution measurements. Coanda owns two Malvern Instruments particle sizers for optical measurements: a Malvern Mastersizer 2000 and a Malvern Mastersizer S. Each device has it's strengths depending on the type of analysis required.
Residence Time Distribution (RTD) Measurements - Coanda has a extensive experience perfroming RTD measurements and analysis on lab systems as well as field systems. Please click on the RTD Technical note in the PDF download section to the left for more information.
Multi-phase Sampling Techniques - We have developed various measurement techniques to quantify gas/liquid/solid holdup, evaluation of bubble size and velocity, and pressure fluctuations.
2-D Laser Induced Fluorescence (LIF) - A flow visualization technique providing qualitative and quantitative scalar field concentration measurements on a two dimensional plane (30 fps progressive scan, 640x480 pixels at 8bits).
1-D Laser Induced Fluorescence (LIF) - A flow visualization technique providing qualitative and quantitative scalar field concentration measurements along a one dimensional line (4000 lps progressive scan, 2048 pixels at 12bits).
Fast Response Thermocouples - With a wire diameter of 0.005", Coanda's fast response thermocouples have a time constant of < 0.04s. Advanced data acquisition hardware and software allow us to sample up to 128 thermocouples, at sample rates approaching 200ks/sec for an individual measurement.
Fast Response Conductivity Probes - Using salt solution as a tracer, our fast response conductivity probes provide a high resolution point measurement of concentration. Up to 20 of these probes can be used simultaneously in situations where LIF techniques are not viable.
In-situ Optical Probes - Based on transmitted and back scattered laser light these probes are used to measure local solids concentrations within fluidized beds providing local emulsion phase concentration, bubble sizes, bubble rise velocities and bubble frequency.
General Laboratory Instrumentation - A wide range of standard laboratory instrumentation is available at Coanda for the measurement of flow, temperature, pressure, etc.