ComFLOW - dambreak experiment
At the Maritime Research Institute Netherlands (MARIN) experiments
have been performed for breaking dam flows. These experiments can be
seen as a simple model of green water flow on the deck of a ship. The
dambreak is a very popular validation case, because the set-up is
easy: no special in- or outflow conditions are needed. A large tank of
3.22 by 1 by 1 meter is used with an open roof. The right part of the tank
is first closed by a door (located at x=2m). Behind the door 1.22 by 0.55
meter of water is waiting to flow into the tank when the door is
opened. This is done by releasing a weight, which almost
instantaneously pulls the door up. In the tank a box has been placed
that represents a scale model of a container on the deck of a ship.
The global geometry is shown in the figure below:
Measurement positions for water heights and pressures in the
During the experiment measurements have been performed of water heights,
pressures and forces. In the above figure the positions of the
measured quantities are shown. Four vertical height probes have been used:
one in the reservoir and the other three in the tank.
The box was covered by eight pressure sensors, four on the front of the box
and four on the top. The forces on the box were also measured.
Measured time series are available for the height sensors
and for the pressure sensors
(xmin / xmax, ymin / ymax, zmin / zmax) = (0.67 / 0.83, -0.2 / 0.2, 0.0 / 0.16)
The water height sensors are located at
H2: (x,y,z) = (1.0, 0.0, 0.0 - 1.0)
H4: (x,y,z) = (2.66, 0.0, 0.0 - 1.0)
The pressure sensors are positioned at
P1: (x,y,z) = (0.831, -0.026, 0.025)
P3: (x,y,z) = (0.831, -0.026, 0.099)
P5: (x,y,z) = (0.806, 0.026, 0.165)
P7: (x,y,z) = (0.733, 0.026, 0.165)
Vertical water heights in the reservoir H4 (left) and the tank H2 (right)
(Fig. 19 from our JCP 2005 paper).
Pressure time histories at P1 (left) and P7 (right) (Fig. 20a&d in
our JCP paper).
More information on the MARIN experiments and the ComFLOW simulations can be
ComFLOW home page