Non-turbulent fluid flow is usually considered laminar if the Reynolds number is less than 2000 in a pipe. Depending upon many possible varying conditions, the flow may be laminar at a Reynolds number as low as 1,200 or as high as 40,000; however, such conditions are not experienced in normal practice. In the pharmaceutical industry, this term incorrectly refers to the air discharge of a clean air bench or wall.
Nonturbulent flow of air in layers (flowing in a vertical direction in the case of a biosafety hood).
Term synonymous with streamline flow and viscous flow. A flow regime in which the flow characteristics are governed mainly by the viscosity of the fluid.
The flow of fluid in which the flow paths are in smooth, parallel lines, with essentially no mixing and no turbulence.
A state of uniform flow within a fluid in which the moving particles travel along parallel paths (compare with Turbulent Flow).
A type of flow in which the fluid moves in parallel lines. Contrast with turbulent flow.
Airflow in which essentially the entire body of air within a confined area moves with uniform velocity and direction as the ambient atmosphere being sampled.
Streamlined flow of a fluid near a solid boundary.
Movement of water within a stream that occurs as uninterrupted parallel flows. Laminar flow generally occurs in areas where friction is low.
Laminar flow is smooth, uniform, non-turbulent flow of a gas or liquid in parallel layers, with little mixing between layers. It is characterized by small values of the Reynolds number.
Characterized by the gliding of concentric cylindrical layers past one another in orderly fashion. Velocity of the fluid is at its maximum at the pipe axis and decreases to zero at the pipe wall.
The linear motion of a fluid.
Airflow free of turbulence, that is to say, free of any eddying motion - a smooth stream.
A non-turbulent flow in which the fluid moves smoothly in parallel layers or sheets.
A flow in which streamlines are straight or gently curved and parallel. (Compare Turbulent flow.)
Slow, smooth flow, with each drop of water traveling a smooth path parallel to its neighboring drops. Laminar flow is characteristic of low velocities, and particles of SEDIMENT in the flow zones are moved by rolling or SALTATION.
A type of flow in which the surface, bed, and internal flow vectors are all parallel to one another, thus there is no mixing. Contrasted to turbulent flow.
nonturbulent streamline flow in parallel layers (laminae)
Occurs when the layer of plastic that is in contact with the mold surface acts as an insulating shell through which molten material flows to fill the remainder of the cavity.
flow where the fluid moves in a parallel manner along the conduit (not turbulent), typically at Reynolds numbers below 2000 and having a velocity profile that is similar to a parabola.
Smooth flow with no mixing across stream lines. Characterised by low Reynolds number.
Gas flow with a smooth, nonturbulent pattern of streamlines, with no streamline looping back on itself; usually occurs at very low Reynolds numbers.1
Laminar flow of thermoplastic resins in a mold is accomplished by solidification of the layer in contact with the mold surface that acts as an insulating shell through which molten material flows to fill the remainder of the cavity.
the flow of a fluid when the fluid flows smoothly without turbulence. Laminar flow is much simpler than turbulent flow and the shear gradients are more clearly defined and uniform.
The movement of a fluid where movement of the entire fluid is regular and with parallel streamlines.
Streamline flow in a fluid near a solid boundary
The type of flow in which water molecules flow in parallel trajectories downstream; There is little or no mixing between layers of water
An airflow moving in a single direction and in parallel layers at constant velocity from the beginning to the end of a straight line vector.
non-turbulent (irrotational) flow of fluids
Flow rate at which liquid is in a nonturbulent flow in which rapid random fluctuations are absent.
Streamline flow in which successive flow particles follow similar path lines and head loss varies with velocity to the first power.
Streamlined flow of a fluid where viscous forces are more significant than inertial forces, generally below a Reynolds number of 2000.
Fluid flow in the absence of turbulence. Also called streamline flow. [Friedman 1989
State of fluid flow, where the particles move along parallel, ordered paths. Results in low friction on submerged surfaces, but has problems to follow retreating shapes (e.g. fuselage tails, airfoil behind location of maximum thickness). see also: Turbulent Flow.
Gas flow of adequate velocity so the gas will flow efficiently over surface obstructions and defects.
A straight, layered flow of air that is free of turbulent motion.
the flow of a fluid or gas that follows the streamlined surface without turbulence.
That type of flow in which each particle moves in a direction parallel to every other particle and in which the head loss is approximately proportional to the velocity (as opposed to turbulent flow).
Smooth and regular fluid flow -- the direction of motion at any point remaining constant as if the fluid were moving in a series of layers sliding over one another without mixing.
Streamlined flow with no turbulence. It is a filtration system used through virtually all clean room processing operations to control airflow and velocity at workstations within the fab. The “path” the airflow takes is optimized to keep airborne particles from coming in contact with the wafers.
a type of fluid flow in which the layers move smoothly past each other without crossing paths (see streamline)
Laminar flow of thermoplastic resins in a mould is accompanied by solidification of the layer in contact with the mould surface that acts as an insulating tube through which material flows to fill the remainder of the cavity. This type of flow is essential to duplication of the mould surface.
The movement of fluid in a particular direction in smooth, continuous, nonturbulent parallel layers which do not mix with each other.
In blood vessels, movement of blood in concentric layers that slip past each other. Central layers flow faster than those at the edge. Compare turbulent flow.
Very smooth flow in which all the molecules are traveling in generally the same direction. For internal flows, it occurs at Reynolds numbers less than 2000.
Gas or fluid in parallel layers with some sliding motion between the layers.
Nonturbulent fluid flow. A smooth flow at relatively low velocity in which the fluid elements follow paths that are straight and are parallel to the channel walls.
Non-turbulent flow. In the pharmaceutical industry, this particularly refers to the air flow in a clean air bench.
(Also called sheet flow, streamline flow.) A flow regime in which fluid motion is smooth and orderly, and in which adjacent layers or laminas slip past each other with little mixing between them. Exchange of material across laminar layers occurs by molecular diffusion, a process about 106 times less effective than turbulence. Laminar flow can be easily predicted as velocity increases at a steady rate from a boundary. This contrasts with the chaotic and random nature of turbulent flow. Laminar flow is not a common occurrence in the statically neutral and unstable atmosphere and is confined to a very thin layer (1 mm) adjacent to very smooth surfaces such as snow and ice. However, in strongly statically stable regions such as the the nocturnal boundary layer, the Richardson number can be large enough that turbulence is suppressed, and the flow is laminar over a layer many tens of meters thick.
Laminar flow, sometimes known as streamline flow, occurs when a fluid flows in parallel layers, with no disruption between the layers. In fluid dynamics, laminar flow is a flow regime characterized by high momentum diffusion, low momentum convection, and pressure and velocity independence from time. It is the opposite of turbulent flow.
Laminar Flow is an album by Roy Orbison recorded at Wishbone Recording Studio in Muscle Shoals, Alabama and released in 1979 on the Asylum Records label.