I am running simulation on sloshing of rectangular tank in ANSYS Fluent. I gave sinusoidal base excitation. how to arrive at the value of sloshing frequency?
S M Tarikul Islam
Geometry and Mesh: Create the geometry of the container and the fluid domain inside it. Generate a suitable mesh for the fluid domain. Setup Physics: Set up a transient analysis in ANSYS Fluent. Define the fluid properties, boundary conditions (e.g., inlet and outlet), and any relevant physics models (e.g., turbulence if applicable). Initial Conditions: Specify the initial conditions for the fluid (e.g., fluid level, velocity, etc.) as per the sloshing problem you are simulating. Time Settings: Define the simulation time step, total simulation time, and the number of time steps required for the transient analysis. Solver Settings: Choose an appropriate solver, adjust solver settings, and ensure numerical stability for the transient simulation. Run the Simulation: Save the case and data files, and run the transient simulation in ANSYS Fluent. Post-Processing: After the simulation is complete, load the results into the post-processing environment in ANSYS Fluent. Fast Fourier Transform (FFT): Use the FFT post-processing tool to analyze the frequency response of the sloshing motion. This will provide you with the frequency and amplitude of the sloshing oscillations. Frequency Analysis: Interpret the FFT results to determine the dominant sloshing frequency and any other relevant frequencies present in the system.
In ANSYS Fluent, determining the sloshing frequency involves performing a transient simulation of the fluid inside the container and then analyzing the frequency response using a Fast Fourier Transform (FFT) post-processing technique. Here's a general outline of the steps:
Remember that the accuracy of the sloshing frequency determination depends on various factors, including the mesh resolution, time step size, and the complexity of the sloshing behavior. It is essential to validate the results against experimental data or analytical solutions when possible.
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