turbulent flow


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Related to turbulent flow: laminar flow, turbulent 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.

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

the flow of a medium (e.g. air or water) in which the molecules are moving in a random, non-ordered manner. Can be an effect of an object or body travelling through the medium.

turbulent flow

swirling/eddying of blood flow through a narrowed blood vessel or one with a roughened tunica intima (e.g. atheroma); uneven blood flow increases intimal shear stresses, increasing atheroma and clot formation

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 ?
Bujalski, "An LDA Study of Turbulent Flow in a Baffled Vessel Agitated by a Pitched Blade Turbine," Chem.
The most frequently adopted models in the turbulent flows are the k-[epsilon] models (Myong et al.
Since much attention has been attracted by drag reduction observed in turbulent flow of polymer solutions (Motoyuki et al.
The computational domain has the dimensions 3[delta], 2[delta] and [delta] in x, y and z direction respectively which is sufficient to carry the amount of turbulent flow conditions.
A consistent and accurate methodology for predicting pressure drop for laminar, transitional and turbulent flow as well as the transition points from laminar to turbulent flow for the flow of Herschel-Bulkley fluids in concentric annuli, without resorting to heavy numerical computations, does not exist and this is the scope of the present paper.
The failure of the CTM to explain the upgradient momentum transport and the associated ETM energy transfer in the turbulent flow challenges the researchers to looking for adequate mechanisms forcing the momentum transport in turbulent flows.
Later, Dodge and Metzner [2] carried out an extensive theoretical and experimental study for turbulent flow of non-Newtonian fluid through smooth pipe using power-law model.
Software will help them predict when and where the transitions from laminar to turbulent flow occur in engines and on surfaces.
patent number 5,065,711), the Ricardo combustion chamber creates a compact, highly turbulent flow that moves toward the piston along, or adjacent, to the axis of the cylinder, which purges the center of the cylinder.
However, unlike a vortex meter, the system does not require inserting anything into the flow stream to generate these vortices; instead, it relies on vortices that naturally occur in turbulent flow.