This page gathers the 28 dictionary entries belonging to the domain “Fluid dynamics”, as labelled by Wiktionary. Each word leads to its full entry: definitions, etymology, pronunciation, examples.
- adjusted flow time noun Of a well-test, a calculation of the cumulative well production since the last extended shut-in period, divided by the flowrate immediately…
- Archimedes number noun A dimensionless number used to determine the motion of fluids due to density differences, defined as the ratio of gravitational forces to…
- Atwood number noun A dimensionless number used in the study of hydrodynamic instabilities in density stratified flows: A=(ρ₁-ρ₂)/(ρ₁+ρ₂), where ρ₁ is the…
- backpressure noun Pressure that is opposed to the desired flow of a fluid (through a duct).
- Bejan number noun A dimensionless number: the pressure drop along the fluid path length in both external flows and internal flows: Be_L=(Δp,L²)/(μν), where μ…
- bow shock noun A shock wave formed by the bow of an object travelling at supersonic speed.
- cavitation noun The formation, in a fluid, of vapor bubbles that rapidly collapse, especially in a rotating marine propeller or pump impeller.
- Couette flow noun The flow of a viscous fluid in the space between two surfaces, one of which is moving tangentially relative to the other, imposing a shear…
- Darwin drift noun The phenomenon by which a fluid parcel is permanently displaced after the passage of a body through a fluid – the fluid being at rest far…
- filtrate tracer noun A substance added to a drilling fluid to track the movement and properties of the filtrate (the liquid which passes through a filter)…
- Gerstner wave noun An exact solution of the Euler equations for periodic surface gravity waves, describing a progressive wave of permanent form on the surface…
- head noun A buildup of fluid pressure, often quantified as pressure head.
- hydraulic jump noun A phenomenon where a high-velocity liquid flow abruptly slows down upon entering a zone of lower velocity, causing a sudden rise in the…
- Kaye effect noun A phenomenon where pouring a viscous mixture of an organic liquid onto a surface causes a jet of liquid to spout upward from the surface…
- Mach wave noun A pressure wave travelling at the speed of sound, caused by a slight change of pressure added to a compressible flow.
- Morison equation noun A semiempirical equation for the in-line force on a body in oscillatory flow, used to estimate the wave loads in the design of oil…
- nonuniform adj Of a flow, not having the same instantaneous velocity at all points.
- peniche noun Material inserted between a half-model, often of an airplane, and the wall of a wind tunnel.
- Prandtl number noun A dimensionless number (symbol Pr) defined as the ratio of momentum diffusivity to thermal diffusivity.
- strake noun Also used more generally to regulate fluid flow in pipes or vents to prevent turbulence or vortexes.
- superposition in time noun A computation accounting for the flowrate history in an analytical model that is generated to match with pressure-transient test data.
- teapot effect noun The phenomenon whereby a liquid being poured from a container runs down the spout or the body of the container instead of flowing out in an…
- thickening time noun The total amount of time in which a cement slurry will remain in a fluid state under simulated downhole conditions and is capable of being…
- time-average equation noun The equation, 1/(V_M)=ϕ/(V_F)+(1-ϕ)/(V_R), used in acoustic log interpretation as a measurement of formation porosity.
- transition point noun The point in space at which fluid flow around an object changes from laminar to turbulent.
- vortex shedding noun An oscillating flow that occurs when a fluid flows past a bluff body at certain velocities. Vortices are created at the back of the body…
- vorticity noun A property of a fluid flow related to local angular rotation; defined as the curl of the flow's velocity field.
- Weissenberg effect noun A phenomenon that occurs when a spinning rod is inserted into a solution of elastic liquid. Instead of being thrown outward, the solution…