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Boundary conditions in computational fluid dynamics
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<p>Almost every <a href="/facts/Computational_fluid_dynamics/zuWdtNJp">computational fluid dynamics</a> problem is defined under the limits of initial and boundary conditions. When constructing a staggered grid, it is common to implement boundary conditions by adding an extra node across the physical boundary. The nodes just outside the inlet of the system are used to assign the inlet conditions and the physical boundaries can coincide with the scalar control volume boundaries. This makes it possible to introduce the boundary conditions and achieve discrete equations for nodes near the boundaries with small modifications. </p><p>The most common boundary conditions used in <a href="/facts/Computational_fluid_dynamics/zuWdtNJp">computational fluid dynamics</a> are </p> <ul><li>Intake conditions</li> <li>Symmetry conditions</li> <li>Physical boundary conditions</li> <li>Cyclic conditions</li> <li>Pressure conditions</li> <li>Exit conditions</li></ul>