Simulation Software for Fluids and SolidsSimulation Fluid-Structure Interaction between an impinging Water Jet and Bottles on a Quality Line
The simulation of a fluid-structure interaction (FSI) between an impinging water jet and bottles on a quality line can be performed using NOGRID points CFD software.
In this FSI simulation, bottles are modeled as rigid bodies moving on a conveyor belt. At a defined time step, a fluid starts to flow out of a nozzle, strikes one of the bottles, and pushes it off the conveyor belt. All bottles that are not hit by the impinging fluid jet continue to move along the belt undisturbed. The individual rigid bodies can collide with each other, which may alter their direction of motion and rotation. The timing of the fluid jet is selected manually by the user in such a way that the defective bottle is hit, in other words, there is no automatic quality control.
The fluid-rigid body interaction simulated in this study is solved in a fully coupled manner using the Lagrangian method. Fully coupled means that the motion (translation and rotation) of the bottles (= the rigid bodies) and the fluid variables for velocity and pressure are solved simultaneously in a large solution matrix (no iterative switching back and forth between the solution variables necessary).
In engineering, fluid-structure interaction (FSI) refers to the consideration of the mutual influence of moving, not necessarily rigid bodies, and a flow. Such interactions occur in many physical applications. In this case, the free impinging jet flow induces both displacement and rotation of the defective bottle due to the forces and torques exerted by the liquid on the body. Conversely, the bottle's motion alters the surrounding flow field. When the flow is influenced by the structure as well, this is referred to as a real, two-sided fluid-rigid-body coupling. If several rigid bodies are present, the motion of one body can additionally be affected by collisions with other bodies.
As with any rigid body in the FSI coupling, the bottles in this simulation are assigned both a weight and a mass moment of inertia. The rigid bodies therefore respond according to the forces and torques exerted by the fluid. Conversely, of course, the fluid flow is also influenced by the motion of the rigid bodies.
NOGRID points can perfectly be used for the design and problem solving for all kinds of FSI processes. The software helps to understand the flow by computing and visualizing the mass, momentum and motion of single or multiple rigid bodies. You receive transient values that allow you to analyze and evaluate the efficiency of components and processes.
Capabilities of NOGRID points CFD software
NOGRID combines the capabilities to handle free surface flow and moving parts within the domain and allows the simulation of any conceivable geometry and operating mode, such as
- fully 3D computation solving the complete Navier-Stokes equations
- easy and intuitive setup also for FSI (Fluid-Structure Interaction) cases
- freely definable material properties by equations or curves
- evaluation of chemical reactions and corresponding heat source terms
- open or closed domains including inflow and outflow areas (non-batch mode)
- moving of parts
Why choose Nogrid?
NOGRID provides professional CFD software for the simulation of fluid flow, heat and mass transfer, and chemical reactions. Its efficient modelling workflow helps engineers analyse flow behaviour, evaluate designs and make informed decisions without creating a conventional volume mesh.
Faster model preparation
With NOGRID, only the geometry boundary needs to be meshed. The finite points inside the fluid domain are generated automatically according to user-defined settings, both at the start of the simulation and during the calculation.
This approach reduces preprocessing effort and makes it easier to prepare complex geometries and cavities for simulation.
Efficient CFD workflow
The modelling process follows four straightforward steps:
Build the geometry. Mesh the boundary. Define the simulation. Start the calculation.
NOGRID is designed to provide short computation times, including for applications involving complex cavities. Engineers can use the resulting data to examine flow distribution and other relevant flow characteristics.
Better insight into fluid-flow processes
CFD solves the fundamental equations governing fluid flow. NOGRID software enables engineers to predict and analyse the behaviour of fluids and related physical processes before or alongside physical testing.
The simulation results can support:
- evaluation and comparison of design alternatives
- optimisation of construction and operating parameters
- improved planning reliability
- reduction of development time and testing effort
- faster progression from design to market or operation
Steps from geometry generation to simulation results
TRAINING
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