In research and training, flow processes are often considered in simplified models, e.g. in pipe flows, open channel drainage processes or the incident flow of structures.
  HM 153 can be used to visualise flow around bodies, pipe flows and flow phenomena in open channels. Various models are fixed in the flow section. The streamlines are made visible by using injected ink as a contrast medium. The flow section is illuminated from behind and has a transparent front plate. The transition from laminar to turbulent flow and the formation of vortices can be clearly observed.
  Three weirs are available for achieving incident flow. Flow through is shown in two interchangeable models with change in cross section. Streamlines in flow around bodies are demonstrated on four drag bodies.
  A flow straightener ensures consistent and low-turbulence flow. HM 153 includes a closed water circuit. Alternatively, the experimental unit can be operated by the laboratory supply.
  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

- flow conditions in
  * incident flow of different shaped weirs
  * flow through different shaped models
- streamlines when flowing around different solid

  drag bodies