scholarly journals Adaptation of the Bridgman anvil cell to liquid pressure mediums

2007 ◽  
Vol 78 (12) ◽  
pp. 123901 ◽  
Author(s):  
A.-S. Rüetschi ◽  
D. Jaccard
Keyword(s):  
Liquid Pressure ◽  
Bridgman Anvil

UCBO Hydraulic Oil and Application on Hydraulic Measurement for Laval Nozzle Throat Diameter

2015 ◽  
Vol 667 ◽  
pp. 449-454
Author(s):  
Yang Hong ◽  
Xiang Zhang ◽  
Dong Xiang Shao ◽  
Guang Lin Wang ◽  
Li Sun
Keyword(s):  
Laval Nozzle ◽  
Oxidation Stability ◽  
Measurement Model ◽  
Diameter Measurement ◽  
Liquid Pressure ◽  
Nozzle Throat ◽  
Hydraulic Oil ◽  
Temperature Performance ◽  
Measurement Principle ◽  
Throat Diameter

This paper proposes a hydraulic measurement model for measuring the Laval nozzle throat diameter size. Based on measurement principle of liquid pressure – flowrate, we can get the size of Laval nozzle throat diameter by measuring the fluid flowrate through hydraulic measurement model at the fixed pressure. With good viscosity-temperature performance, low temperature performance and oxidation stability, UCBO aviation hydraulic oil is selected as the measuring medium. In the hydraulic measurement model, the diameter of the mandrel which can be regarded as gauge will directly affect the sensitivity of diameter measurement. Therefore we need to optimize the design of the mandrel of the hydraulic model.

scholarly journals Study of the Mechanical Environment of Chondrocytes in Articular Cartilage Defects Repaired Area under Cyclic Compressive Loading

2017 ◽  
Vol 2017 ◽  
pp. 1-10
Author(s):  
Hai-Ying Liu ◽  
Hang-Tian Duan ◽  
Chun-Qiu Zhang ◽  
Wei Wang
Keyword(s):  
Articular Cartilage ◽  
Cyclic Loading ◽  
Response Curve ◽  
Fluid Pressure ◽  
Cartilage Defects ◽  
Loading Frequency ◽  
Liquid Pressure ◽  
Mechanical Environment ◽  
Finite Element Software ◽  
Maximum Value

COMSOL finite element software was used to establish a solid-liquid coupling biphasic model of articular cartilage and a microscopic model of chondrocytes, using modeling to take into account the shape and number of chondrocytes in cartilage lacuna in each layer. The effects of cyclic loading at different frequencies on the micromechanical environment of chondrocytes in different regions of the cartilage were studied. The results showed that low frequency loading can cause stress concentration of superficial chondrocytes. Moreover, along with increased frequency, the maximum value of stress response curve of chondrocytes decreased, while the minimum value increased. When the frequency was greater than 0.2 Hz, the extreme value stress of response curve tended to be constant. Cyclic loading had a large influence on the distribution of liquid pressure in chondrocytes in the middle and deep layers. The concentration of fluid pressure changed alternately from intracellular to peripheral in the middle layer. Both the range of liquid pressure in the upper chondrocytes and the maximum value of liquid pressure in the lower chondrocytes in the same lacunae varied greatly in the deep layer. At the same loading frequency, the elastic modulus of artificial cartilage had little effect on the mechanical environment of chondrocytes.

Pleural liquid pressure over the interlobar mediastinal and diaphragmatic surfaces of the lung

1981 ◽  
Vol 46 (1) ◽  
pp. 61-69 ◽  
Author(s):  
Giuseppe Miserocchi ◽  
Taizo Nakamura ◽  
Enrico Mariani ◽  
Daniela Negrini
Keyword(s):  
Liquid Pressure ◽  
Pleural Liquid Pressure

Nonlinear bending and stability of circular plates under the liquid pressure and temperature

2016 ◽  
Vol 59 (1) ◽  
pp. 1-7 ◽  
Author(s):  
M. S. Ganeeva ◽  
V. E. Moiseeva ◽  
Z. V. Skvortsova
Keyword(s):  
Circular Plates ◽  
Liquid Pressure ◽  
Nonlinear Bending

The low liquid pressure acoustic hydrodynamic transducer and its use in spraying processes

Ultrasonics ◽  
1976 ◽  
Vol 14 (3) ◽  
pp. 107-110 ◽  
Author(s):  
B.A. Klopovsky ◽  
V.M. Fridman
Keyword(s):  
Liquid Pressure

Gas—liquid pressure—temperature—composition critical loci for n-butanenitrile with C5 to C11 n-alkanes

1990 ◽  
Vol 61 (1-2) ◽  
pp. 99-110 ◽  
Author(s):  
Gaudencio Eliosa ◽  
Florentino Murrieta-Guevara ◽  
Joel Reza ◽  
Arturo Trejo
Keyword(s):  
Liquid Pressure

Alveolar liquid pressure measured in the intact rabbit chest by micropuncture

1993 ◽  
Vol 75 (4) ◽  
pp. 1525-1528 ◽  
Author(s):  
S. Ganesan ◽  
S. J. Lai-Fook
Keyword(s):  
Ambient Pressure ◽  
Lateral Position ◽  
Measuring System ◽  
Parietal Pleura ◽  
Liquid Pressure ◽  
Left Lateral Position ◽  
Isolated Lung ◽  
Residual Capacity ◽  
Alveolar Liquid

Previous measurements in isolated lung showed that alveolar liquid pressure was near the pleural pressure at a lung volume near functional residual capacity (FRC). In this study we verified that alveolar liquid pressure in vivo was similar to that of the isolated lung. In anesthetized paralyzed rabbits (3#x2013;4 kg, n = 9) ventilated with 100% O2 in the left lateral position, we made a pleural window between the fifth and sixth ribs near midchest by removing tissue down to the parietal pleura. Window height was 6 cm above the base of the lung. During apnea, alveolar liquid and pleural pressures were measured by puncturing through the pleural window with micropipettes connected to a servo-nulling pressure-measuring system. Pressures were measured at airway pressures of 0 (FRC) and 10 cmH2O both in vivo and postmortem. In vivo, alveolar liquid and pleural pressures relative to ambient pressure averaged -2.3 +/- 1.4 (SD) and -1.8 +/- 0.9 cmH2O at FRC and increased to 3.3 +/- 1.8 and 1.8 +/- 1.6 cmH2O after inflation to an airway pressure of 10 cmH2O, respectively. Similar values were obtained postmortem. These results were similar to previous measurements in the isolated lung.

Reabsorption kinetics of albumin from pleural space of dogs

1988 ◽  
Vol 255 (2) ◽  
pp. H375-H385 ◽  
Author(s):  
M. Miniati ◽  
J. C. Parker ◽  
M. Pistolesi ◽  
J. T. Cartledge ◽  
D. J. Martin ◽  
...  
Keyword(s):  
Control Mechanism ◽  
Mean Transit Time ◽  
Input Function ◽  
Pleural Space ◽  
Frequency Function ◽  
Liquid Pressure ◽  
Physiological Conditions ◽  
Transit Times ◽  
The Mean ◽  
Kinetics Of

The reabsorption of albumin from the pleural space was measured in eight dogs receiving 0.5 ml intrapleural injection of 131I-labeled albumin and a simultaneous intravenous injection of 125I-labeled albumin. Plasma curves for both tracers were obtained over 24 h. The 125I-albumin curve served as input function of albumin for interstitial spaces, including pleura, whereas the 131I-albumin curve represented the output function from pleural space. The frequency function of albumin transit times from pleural space to plasma was obtained by deconvolution of input-output plasma curves. Plasma recovery of 131I-albumin was complete by 24 h, and the mean transit time from pleura to plasma averaged 7.95 +/- 1.57 (SD) h. Albumin reabsorption occurred mainly via lymphatics as indicated by experiments in 16 additional dogs in which their right lymph ducts or thoracic ducts were ligated before intrapleural injection. A pleural lymph flow of 0.020 +/- 0.003 (SD) ml.kg-1.h-1 was estimated, which is balanced by a comparable filtration of fluid into the pleural space. This suggests that, under physiological conditions, the subpleural lymphatics represent an important control mechanism of pleural liquid pressure.

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