To main content

Circulating Water Tunnel

The new Circulating Water Tunnel (CWT) is a test facility dedicated to optical measurement techniques and flow visualization. The tank's measurement section is completely transparent and can be operated either with a free surface or the lid closed.

Contact person

bilde av student i CWT lab

Laser-based techniques like PIV (Particle Image Velocimetry) and LDV (Laser Doppler Velocimetry) allow non-intrusive measurements of instantaneous 3D flow fields at high temporal and spatial resolutions. The laboratory is hence especially well-suited for research projects that integrate experimental and computational results. Studies of basic wake hydrodynamics as well as applied cases of marine flows have been successfully performed here.

The CWT is operated by the Department of Marine Technology (NTNU), in co-operation with SINTEF.


  • Test section: 2,50 x 0,61 x 0,61 m
  • Low turbulence level of 1% of free stream velocity.
  • Flow speed from 0,03 to 1 m/s. Also varying flow speed.
  • Fixed or free surface

Explore research areas

Contact information


Contact information:

Chittiappa Muthanna