The vertical water channel, built in 2015, is used for the investigation of multiphase flows. By means of different methods (particle lattice, fractal lattice or an active lattice) the facility can generate flows which are similar to the statistics of real multiphase flows.

A full optically accessible 0.08 x 0.08 x 1 m³ test section is available for the measurements. Since mass transport measurements are carried out in the facility in addition to flow measurements, the facility is made entirely of stainless steel. The fluid is stored in a basin at the upper end and driven by gravity through the measurement section and the turbulence generators to generate a downward directed flow. By means of an electric valve at the lower outlet, a flow rate of up to 0.5 m/s can be set in the duct. For the introduction of bubbles, devices are available at 3 locations on the test section to generate individual bubbles or swarms. By regulating the generated flow (counterflow for the ascending bubbles), these can be held at the desired positions and it becomes possible to analyze their interaction with turbulence.


Basic data

Dimensions of facility: 1 x 1 x 4 m³
Dimensions of measurement section: 0,08 x 0,08 x 1 m³
Material: Stainless steel and borosilicate glass
Fluid volume: 250 l
Flow velocity: 0 - 0,5 m/s
Turbulence level (without grid):  Tu ca. 10%
Turbulence level (with grid):  Tu ca. 40%
Bubbles (diameter): 1 - 7 mm
Bubbel swarm density: up to 10%