turbulent flow

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Related to turbulent flow: laminar flow, turbulent blood flow


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.

tur·bu·lent flow

(tŭr'byū-lĕnt flō)
A flow of gas characterized by a rough-and-tumble pattern; all molecules proceed at the same velocity, and resistance to flow is increased when compared with laminar flow.

turbulent flow

occurs in blood vessels where there is a stenosis or aneurysm or where there is a sudden increase in velocity; the laminar flow of normal tubes is disrupted and the fluid is randomly and completely mixed; turbulent flows have a greater apparent viscosity than laminar flows.
References in periodicals archive ?
But it also reminds us that going far beyond the transition to turbulent flow results in a diminishing cost-benefit ratio.
Mass transfer between solid wall and fluid streams, mechanism and eddy distribution relationships in turbulent flow.
This is because of a strong mixing of the fluid induced form turbulent flow and appearance of reverse flow between the adjacent smooth elements.
The influence of different turbulent flow conditions was investigated with the turbulence generation system (TGS) in the Pininfarina wind tunnel by Cogotti [28].
Wind tunnel tests with a mix of smooth and rough surfaces on airfoils show that the point of separation from laminar to turbulent flow preferentially favors areas of increased roughness.
Computational fluid dynamics studies of developing turbulent flows with various entrance geometries.
After turbulent flow was established, the Reynolds number was reset to the actual Re = 2100 and allowed to equilibrate for 9 FTT.
The Turbulent Kinetic Energy (TKE) is the mean kinetic energy per unit mass in turbulent flow.
The character of the turbulence attenuation occurring along the flow axis agrees with the behaviour of the decay curves in the grid-generated turbulent flows described by Hinze (1975).
Transthoracic echocardiographic apical 4-chamber views of a diastolic turbulent flow at the site of the lateral mitral annulus (black arrow)
The models are widely used for low viscosity, turbulent flow mixing of fluids and for gas-liquid, gas-gas mixing.
Featured topics include multiphase flow simulation, turbulent flow, bubble and drop dynamics, heat transfer, incline flows, energy application, and flow in porous media.