A weir is a barrier structure that regulates or closes off the flow of a watercourse. This means that a weir is also a dam structure. The labyrinth weir shown here is a fixed weir that has a greater overflow length than an overflow weir, and has a low structural breadth. This animation was inspired by discussions with weir specialist Dr. Michael Gebhardt (www.baw.de) – many thanks!

The size of the model area is 40 m x 18.5 m (base area), polygon count of the model: 4,315, render engine Vray 4.0 Next.

On calculating with Real Flow 10

Real Flow is a simulation software for fluid simulations that can be used both as a stand-alone application and as a plug-in for 3ds max.

The calculation was carried out using SPH (Smoothed Particle Hydrodynamics) and was calculated for fluid (water body) and spray (foam, splash)

The maximum number of particles in the water body is just under 5 million. The export for further processing in 3ds max was done as water body and spray system. In this case, the simulation itself was carried out in Real Flow 10, the generated result data was loaded into 3ds max and rendered there with VRay.

Duration of animation 20 seconds. The animation was slowed down by half and extended to 40 seconds.