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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

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.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
This paper reviewed and analysed the investigations of particle distribution and deposition throughout the bend turbulent flow. Basic particle deposition and carrying gas flow theories were introduced at the beginning of this review work.
It is important to mention that in some cases, mass transport models are involved with turbulent flow conditions, the term of turbulent diffusivity that appears in (5).
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. Industrial and Engineering Chemistry, 45(3), 636-640.
The outcomes are presented hereafter focusing on the impacts of nanoparticle volume concentration and size diameter of TEG based CuO and TEG based SiNnanofluids nanoparticles and different Reynolds number on the hydrodynamic flow and thermal performance of the nanofluids under the turbulent flow condition.
As the wing approaches its critical angle of attack, the point where laminar flow separates from turbulent flow moves forward along with the center of pressure (the focal point of lift).
Computational fluid dynamics studies of developing turbulent flows with various entrance geometries.
Swirling turbulent flows in a combustion chamber with and without heat release, Fuel, 104: 133-146.
In this paper, we address the problem of comparing the influence of gravity on particle statistics for turbulent flow in channel and pipe with the same Karman number.
The highly turbulent flow helps reduce fouling and makes cleaning-in-place procedures more effective.