Fluid Dynamics

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9 domain-specific abstractions whose origin domain is Fluid Dynamics.

• Acoustic streaming — A steady fluid flow generated when attenuation or boundary dissipation converts oscillatory acoustic momentum into a time-averaged body force or stress.
• Chaotic mixing — Fluid mixing produced by repeated stretching and folding of material elements, generating exponentially fine filaments even in deterministic flows.
• Hamiltonian Fluid Mechanics — Represent nondissipative continuum motion by a Hamiltonian functional and a canonical or noncanonical Poisson structure whose bracket generates the fluid equations and exposes invariants, symmetries, and stability constraints.
• Janzen–Rayleigh Expansion — A low-Mach regular perturbation method for compressible potential flow that expands the velocity potential and derived fields in powers—often even powers—of a reference Mach number around the incompressible solution.
• Kármán vortex street — An alternating periodic array of counter-rotating vortices shed downstream of a bluff body within a characteristic range of flow conditions.
• Landau–Levich problem — A thin-film fluid problem determining the coating deposited on a plate withdrawn slowly from a liquid bath through the balance of viscous, capillary and gravitational effects.
• Marangoni number — A dimensionless ratio comparing surface-tension-gradient-driven transport with diffusion of the quantity producing that gradient.
• Starting vortex — The shed vortex formed near an airfoil’s trailing edge as circulation builds during acceleration from rest.
• Taylor–Culick flow — An idealized axisymmetric flow in a long closed-end cylinder with uniform injection through a porous sidewall and axial discharge toward the open end.