Described equipment belongs to marine chemical ecology and biohydrodynamic group at the Department of Marine Sciences. Responsible for equipment are Ann Larsson and Per Jonssonand the equipment is available upon agreement with lab supervisors.
Larger flume tank with associated instruments: The flume tank is 6.5 metres long, 0.5 metre wide and 0.3 metre deep. The water (1200 litres) is recirculated through a pipe underneath the tank. The flow velocity can be regulated up to approx. 1 metre/sec and the velocity can be measured with a ADV (Acoustic Doppler Velocimeter, Nortek AS) in three dimensions at max 25 Hz. The walls of the flow tank are transparent and the water in the flume tank can be cooled to desired temperature. A laser based PIV/LIF system (LaVision with DaVis software) is installed by the flume tank. The PIV (Particle Image Velocimetry) system is measuring magnitude and direction of the flow in a two-dimensional plan with high spatial and temporal (max 15 Hz) resolution. With the LIF (Laser Induced Fluorescence) system, transport and dispersion of chemical substances in the water can be studied and spatial distribution of the substance in one dimension can be measured at max 15 Hz.
Smaller flume tank: The flume tank is 2 metres long, 0.2 metre wide and 0.1 metre deep. The tank with recirculating water holds 65 litres. Maximum flow velocity is 0.2 metre/sec.
Flow channel with flow-through water: The flume tank is 1.7 metres long, 0.3 metre wide and 0.15 metre deep. The water is continuously flowing through the channel and the outflow is tapered and has adjustable width. Maximum flow velocity is approx. 0.05 metre/sec.
ADCP for water current measurements in the field: ADCP (Acoustic Doppler Current Profiler, 1 MHz Nortek AS) measures water current velocity in three dimensions and at multiple levels in the water column. The extent of the measuring layers can be varied 0.3-4 metres and the maximum registered speed is 10 metres/sec. The range of the profiler is approximately 10-20 metres depending on the properties of water. Assembly equipment is available for measurement from bottom upwards or towards the bottom.