This work simulates methane gas flow across an aperture inside a channel using a CFD model. Designed in 3D with Design Modeler tools, the model represents a 12-inch long channel with a 0.5-inch diameter and a center orifice with a 0.25-inch diameter.
A perforated plate placed perpendicularly to the direction of fluid flow forms the most basic orifice model. Using a structured mesh with 54,648 elements to guarantee accurate simulation results, this model is meshed using ANSYS Meshing software.
Mass flow through pressure difference transmitters is routinely measured using the orifice equipment. Following Bernoulli's principle and mass conservation, a fluid's velocity increases as it passes through an aperture from decreased cross-sectional area. Velocity reduces as the area grows upon leaving, which raises flow pressure.
Along with graphs of pressure and velocity changes across the central axis and through the orifice section, the simulation generates two- and three-dimensional velocity and pressure contours.
This study exemplifies the orifice’s capability in determining fluid flow rates accurately by analyzing pressure differences, providing valuable insights into flow dynamics for engineering applications. If you’re interested in further details or need guidance on similar simulations, feel free to reach out!
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