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Critical speeding up observed

Physical Review Letters, 1990
The extreme compressibility of a fluid near its liquid-vapor critical point significantly alters its dynamic response to temperature changes. Adiabatic processes allow a fluid of constant volume to thermalize in a matter of seconds, compared with the hours or days that thermal diffusion would require.
, Boukari   +3 more
openaire   +2 more sources

VO2 Responses to Running Speeds Above Intermittent Critical Speed

International Journal of Sports Medicine, 2012
The aim of this study was to examine whether intermittent critical speed (ICS) is the threshold velocity above which intermittent exercise leads to the attainment of VO(2max). After an incremental test, 7 active male subjects (49.7 ± 3.74 mL.min (- 1).kg (- 1)) performed 3 intermittent exercises until exhaustion at 100%, 110%, 120% of the velocity ...
R A, de Aguiar   +3 more
openaire   +2 more sources

Critical speeding up in pure fluids

Physical Review A, 1990
The extreme compressibility of a pure fluid near its critical point significantly affects its bulk dynamic response to temperature changes through adiabatic processes. Equations that describe the dynamics in the absence of gravity are developed, and the magnitude of the effect is illustrated with numerical solutions in one dimension.
, Boukari   +3 more
openaire   +2 more sources

Remote Determination of Critical Speed and Critical Power in Recreational Runners

International Journal of Sports Physiology and Performance, 2023
Purpose: This study aimed to compare estimations of critical speed (CS) and work completed above CS (D′), and their analogies for running power (critical power [CP] and W′), derived from raw data obtained from habitual training (HAB) and intentional maximal efforts in the form of time trials (TTs) and 3-minute all-out tests (3MTs) in recreational ...
Ben Hunter   +2 more
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Critical Speed in Centrifugal Pumps

Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; Process Industries; Technology Resources; General, 1982
In high pressure centrifugal pumps the magnitude of the critical speed is strongly affected by the presence of liquid in the close clearance spaces of sealing rings and throttle bushings. The stiffening and damping effect resulting from the non-axisymmetric pressure drop across such gaps is often large compared with the elastic stiffness of the shaft ...
S. Gopalakrishnan, R. Fehlau, J. Lorett
openaire   +1 more source

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