How to give point excitation??

To simulate the 2D sloshing tank phenomena with air and water as fluids using the Fluent software, you can provide the excitation at a specific point in the tank by following these steps:

Set up the Geometry: Create a 2D geometry of the tank in the Fluent software, ensuring that it matches the dimensions you mentioned (length: 0.57m, water height: 0.15m, total height: 0.32m). Define appropriate boundary conditions for the tank walls, such as wall or symmetry conditions.

Set up the Mesh: Generate a mesh for the tank geometry to discretize the computational domain. Ensure that the mesh resolution is appropriate for capturing the sloshing behavior and resolving the boundary layers near the tank walls.

Set up the Physics: Define the fluid properties for water and air in the Fluent software, such as density, viscosity, and surface tension (if applicable). Set up a two-phase model to account for the presence of both air and water in the tank.

Define the Excitation: To provide the point excitation at the center of the tank and on the free water surface, you can use the dynamic mesh capability in Fluent. Follow these steps:a. Go to the "Cell Zone Conditions" panel and create a new zone for the water surface or select an existing zone representing the water-air interface.b. Enable the dynamic mesh capability by going to the "Models" panel and selecting "Dynamic Mesh."c. Define a zone motion for the specified point on the water surface. In this case, you can use the "Define/Grid Motion" option and select "Zone Angular Velocity." Set the angular velocity (Acos(wt)) for the specified point on the water surface. Ensure that the rotational axis is aligned with the vertical axis of the tank.

Specify Boundary Conditions: Set appropriate boundary conditions for the inlet, outlet, and tank walls to simulate the desired flow behavior. You can use pressure inlet/outlet conditions, velocity inlets, or any other suitable boundary conditions based on your specific simulation requirements.

Run the Simulation: Set up the time parameters, such as the start time, end time, time step size, and convergence criteria. Initialize the simulation and start the calculation. Monitor the convergence and progress of the simulation.

Post-Processing: Once the simulation is complete, analyze and visualize the results to observe the sloshing behavior of water in the tank. Fluent provides various post-processing tools to visualize flow patterns, track the water-air interface, and extract relevant data from the simulation.

Note that this is a general guideline for setting up the simulation. The specific details may vary depending on the version of Fluent you are using and the exact features available. It is recommended to consult the Fluent documentation, tutorials, and user forums for more detailed and version-specific instructions on simulating sloshing phenomena and providing point excitation in Fluent.

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