Simulation Structure-Structure Interaction Domino Effect
In this article, we present a structure-structure interaction (SSI) simulation of tipping dominoes. The first domino is initially tilted and causes the others to fall. All dominoes are treated as rigid bodies, and the collisions are modeled as completely inelastic. This type of setup is referred to as a rigid body simulation (RBS).
The dominoes are modeled as rigid bodies and can move freely when forces act on them. Individual rigid bodies may collide with each other and change their direction of motion. In this study, collisions between the rigid bodies and the walls are assumed to be perfectly inelastic. Unlike elastic collisions, inelastic collisions do not conserve kinetic energy, due to the effect of internal friction. The NOGRID software can compute both elastic and inelastic collision regimes, which are controlled by a plasticity coefficient.
Rigid body simulation refers to the simulation of transient motion of rigid bodies. Rigid body mechanics deals with physical bodies that are assumed to be no-deformable. During the simulation, the rigid bodies can move, but the shape or structure remains unchanged. Various types of forces may act on the rigid body: gravity, magnetic forces, frictional forces, etc. These forces accelerate the rigid body, causing changes in its translational and rotational velocities. In addition, collisions between rigid bodies may occur, which result in sudden changes in the translational and rotational velocities of the bodies involved.
In this 3D example, a rigid domino topples onto another rigid body (see Figures 1 and 2). The simulation is solved in a fully coupled manner using the Lagrangian method. Fully coupled means that the stresses within the bodies are simultaneously resolved within a large solution matrix. Alternatively, the Eulerian method can also be applied to solve this case.
As with any rigid body in the FSI coupling, the dominoes in this simulation are assigned a weight and a mass moment of inertia. The rigid body thus behaves in accordance with the forces acting on it. If several rigid bodies are involved, the movement of one body can of course also be influenced by collisions with other bodies.
NOGRID points can be effectively 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 and multiple rigid bodies. It provides receive transient values that can be used to analyze and evaluate the efficiency of the components or processes.
Capabilities of NOGRID points CFD software
NOGRID unites abilities to handle free surface flow and moving parts in the domain allows the simulation of any conceivable geometry and operation modes such as
- computation is in full 3D solving complete Navier-Stokes-Equations
- easy and intuitive setup also for SSI (Structure-Structure Interaction) cases
- free 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
Nogrid's strengths
Easy and fast modelling: Build geometry, mesh boundary, setup the case and start computation
What is CFD from NOGRID?
CFD solves the fundamental equations that define the fluid flow process. With CFD software from NOGRID every engineer makes better decisions by predicting, analyzing and controlling fluid flow, heat and mass transfer or chemical reaction. By using NOGRID software for flow modeling you receive information on essential flow characteristics as for example flow distribution. Using it additional to testing and experimentation NOGRID software helps to improve the evaluation of your design – resulting in better construction and operation parameters, increasing planning security and money savings due to faster time to the marketplace for your product or process.
Choose NOGRID
With NOGRID, you choose professional CFD software and services – our aim is helping you to be successful. When you decide to work with NOGRID you choose close cooperation with a dynamic, flat hierarchies-organization. Short information channels result in quick and accurate professional support and service. Our team consists of highly qualified employees, who are experts in fields such as numerical simulation or computational fluid dynamics. Based on our know-how, we are pleased to offer the following services, responding to your individual requirements:
TRAINING
In our two-days training courses you will learn, how to use NOGRID CFD software efficiently. Our technical support team will teach you how to handle and solve different cases.
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We offer full professional support from the minute you start using our software, by telephone or by email. Contact us, when ever needed.
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Lack of time or resources and other constraints often make outsourcing an attractive solution. We help you with your flow modeling needs. Based on our engineering expertise in this field we offer individual numerical simulation services matching the unique needs of your organization.
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