Special Models
FLOW-3D features many special physical models unique among CFD tools. These models enable the simulation of separators including moving blades, scrapers, and impellers as well as drifting and settling of solid materials.
Operation of a tainter gate.
Click to view animation
(Analysis by CFD Solutions)
Scouring effects from weir overflow.
Graphic by Fieldview
Air Entrainment caused by
Spillway Flow (Analysis by
Groupe Conseil Genivar)
Fluid-Solid Interaction
Frequently, the flows that engineers need to model include moving components. In FLOW-3D, the movement of objects fully coupled with fluid flow can be simulated, making it possible to improve the function of these devices quickly and reliably. The General Moving Object model was introduced with Version 9.0. This robust model, the only one of its kind in commercial CFD codes, allows users to model rigid body dynamics with six-degrees-of-freedom fully coupled with fluid flow. This powerful new model has many attributes that will give engineers a powerful tool:
- Users can evaluate the motion of multiple objects.
- There are no limitations on the geometry or range of motion.
- Objects can be allowed to move freely, or the user can prescribe the motion.
- Specified time-dependent thrust forces and torques can be applied to the objects.
- The range of motions includes motion around a fixed axis or point.
Click on the image above to download an animation depicting the opening and closing of a tainter gate. Read more about modeling fluid-solid interaction using FLOW-3D here.
Scour and Deposition
Scour and deposition is an important consideration in the design of bridges, dams and reservoirs. The sediment scour model in FLOW-3D can help study the deformation of a moving bed caused by sediment transport processes.
Air Entrainment
When air is entrained into water, it can help sustain the growth of microorganisms and insure the survival of healthy fish populations. Understanding and controlling air entrainment can reduce cavitation damage on hydraulic structures. The air entrainment model in FLOW-3D enables users to study complicated problems such as these, where the solution depends on the interaction between air and water.
Read
more in our Water and Environmental Engineering Tech Papers