laminar flow


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Related to laminar flow: transitional flow, laminar blood flow

flow

 [flo]
1. the movement of a liquid or gas.
2. the amount of a fluid that passes through an organ or part in a specified time; called also flow rate.
forced expiratory flow (FEF) the rate of airflow recorded in measurements of forced vital capacity, usually calculated as an average flow over a given portion of the expiratory curve; the portion between 25 and 75 per cent of forced vital capacity is called the maximal midexpiratory flow. Called also forced expiratory flow rate.
laminar flow smooth, uninterrupted flow as of a gas through a tube.
maximal expiratory flow FEF200–1200; the rate of airflow at forced vital capacity, represented graphically as the slope of the line connecting the points 200 mL and 1200 mL on the forced expiratory volume curve. See also pulmonary function tests. Called also maximal expiratory flow rate.
maximal midexpiratory flow FEF25–75; the maximum rate of airflow measured between expired volumes of 25 and 75 per cent of the vital capacity during a forced expiration; represented graphically as the slope of the line connecting the points on the forced expiratory volume curve at 25 and 75 per cent of the forced vital capacity. See also pulmonary function tests. Called also maximal midexpiratory flow rate.
renal plasma flow (RPF) the amount of plasma that perfuses the kidneys per unit time, approximately 90 per cent of the total constitutes the effective renal plasma flow, the portion that perfuses functional renal tissue such as the glomeruli.
turbulent flow flow that is agitated or haphazard.

lam·i·nar flow

the relative motion of elements of a fluid along smooth parallel paths, which occurs at lower values of a Reynolds number.

laminar flow

lam·i·nar flow

(lam'i-năr flō)
The relative motion of elements of a fluid along smooth parallel paths, which occurs at lower values of a Reynolds number.

laminar

made up of laminae or layers; pertaining to a lamina.

laminar bone
see laminar bone.
laminar cortical necrosis
necrosis of the superficial layers of the cerebral cortex. See also polioencephalomalacia.
laminar dermis
the sensitive laminae in the horse's hoof; interdigitate with the insensitive laminae on the inner aspect of the horn of the hoof.
laminar flow
the flow of liquid through a tube so that the fluid passes along in concentric layers which slide over each other.
References in periodicals archive ?
Homotopy Analysis Solutions for the Asymmetric Laminar Flow in a Porous Channel with Expanding or Contracting Walls.
It can be explained that the existing of solid particles is helpful to keep the laminar flow of the CHS.
He showed that the velocity profile of Newtonian fluid in laminar flow regime would differ dramatically in an eccentric annulus.
Laminar flow ratio (1) is defined by the authors to be the ratio derived by dividing the cross-sectional area (a) of the runner by the perimeter (p) of the runner cross-section.
The increased resistance will be seen down into the smaller airways until the inherent laminar flow effect from the multitude of parallel airways, takes effect.
The relationship between (n') and the Herschel-Bulkley parameters can be derived by combining the laminar flow solution (Equation (2)) with the definition of (n'), Equation (10), as it is done in the case of pipe flow, giving finally:
Of course, ideal laminar flow is difficult to achieve, even under ideal conditions.
Samples were processed under a laminar flow hood to prevent contamination, and PCR assays were repeated twice.
Baer-Riedhart began working with NASA in 1974 and has since worked on the F-18 High Angle-of-attack Research Vehicle program, the Optical Air Data System project, the Joined Wing Research Aircraft, the F-14 Variable Sweep Transition flight experiment, the JetStar Laminar Flow Control program, the F-15 Highly Integrated Digital Electronic Control program and the F-11 Transonic Aircraft Technology program.
A wind tunnel made of PVC pipe, a digital balance, and a vacuum was also constructed to test the air foils at the same laminar flow velocity.
Disc pumps operate on boundary layer/viscous drag forces that produce a laminar flow with no pulsation.
The extended pour spout creates a smooth laminar flow of material.