Laseroptical flow measurements


Dr. Ulrich Müller
Telefon: +49 (0)7621 160 1515

Laser-optical flow measurement technology - our solutions for test bench optimisation, flow diagnosis, validation of simulation results (CFD), volume flow measurement, etc.

Measurement methods used:

  •     Particle Image Velocimetry (PIV)
  •     Laser Doppler Velocimetry (LDV)
  •     Phase Doppler Anemometry (PDA)
  •     a.o.

Your advantages when using our services - know-how and equipment technology:

  •     Use of high-end measurement technology without risk
  •     Fast problem solving due to short training period
  •     No acquisition costs for instrumentation
  •     Access to fluidic expertise and extensive experience
  •     Support for internal capacity problems

Typical sequence of a service:

  •     Systematic problem analysis
  •     Conception of the measurements
  •     Modification and provision of the measurement technology
  •     Carrying out the measurements
  •     Evaluation and discussion of the measurement results.

Differentiation PIV - LDV


  •     Locally high-resolution point 1D or 2D velocity measurements in transparent fluids.
  •     Use of cw lasers with low to medium light powers (approx. 10 to approx. 500 mW)
  •     One-sided optical access to the fluid necessary
  •     Sequential measurement of flow fields, e.g. full-field measurements in pipe cross-sections
  •     Uncertainties of measurement approx. 0.2 -0.5 per cent of measuring value
  •     Seeding: natural impurities (water) or low seeding (gases) necessary


  •     Two-dimensional, spatially and temporally high-resolution 2D and 3D measurements in transparent fluids
  •     Temporal resolutions up to the kilohertz range possible
  •     Two-sided optical access to the fluid necessary (for light section and camera)
  •     Use of pulsed high-power lasers or laser diodes
  •     Measurement uncertainties approx. 2 -5 per cent of measuring value
  •     Seeding with suitable particles in the micrometre range necessary
Further information on test bench and pipe flow measurements
Further information on laseroptical measurements of flow phenomena

LDV measurements for volume flow determination on a coolant test bench with glycol

PIV measurements for flow diagnosis on a test bench for room air sensors

LDV measurements on the balance of a clock

LDV measurements for flow diagnosis on a development test bench

PIV measurements of the flow around smoke detectors in a fire room

LDV measurements of the axial velocity distribution in a Venturi tube