High-pressure short time behavior of traction fluids

10.1002/ls.3 ◽  
2005 ◽  
Vol 18 (1) ◽  
pp. 25-36 ◽  
Author(s):  
Nobuyoshi Ohno ◽  
M. D. Ziaur Rahman ◽  
Hiroshi Tsutsumi
Keyword(s):  
High Pressure ◽  
Time Behavior ◽  
Traction Fluids ◽  
Short Time

Application of Acoustic Emission for High-Pressure Short Time Solidification of Traction Fluids

2005 ◽  
Author(s):  
Nobuyoshi Ohno ◽  
Wataru Tokunaga
Keyword(s):  
High Pressure ◽  
Acoustic Emission ◽  
Dynamic Condition ◽  
Static Condition ◽  
Lubricating Oil ◽  
Rolling Bearings ◽  
Traction Fluids ◽  
Dynamic High Pressure ◽  
Short Time ◽  
The Impact

The lubricating oils solidify at quasi-static high-pressure as the amorphous or glassy solids are verified by a number of studies. However, solidification of lubricating oil under the dynamic condition as the rolling bearings and the traction CVT is not clear. The high-pressure short time solidification of traction fluids is examined by the analysis of dent after the impact tests and AE analysis under impact loads. The intensity of each impact collision is measured by means of an acoustic emission (AE) sensor. The dimensionless AE r.m.s value is investigated by based on phase diagram of testing oils. It was recognized the solidification of oil under the dynamic high-pressure condition almost corresponded to the static condition.

Short time behavior and universal relations in polymer cyclization

1991 ◽  
Vol 1 (4) ◽  
pp. 471-486 ◽  
Author(s):  
Barry Friedman ◽  
Ben O'Shaughnessy
Keyword(s):  
Time Behavior ◽  
Short Time

Short Time Behavior of Solutions to Linear and Nonlinear Schrödinger Equations

2008 ◽  
Vol 60 (5) ◽  
pp. 1168-1200 ◽  
Author(s):  
Michael Taylor
Keyword(s):  
Broad Class ◽  
Nonlinear Schrödinger Equations ◽  
Schrodinger Equations ◽  
Time Behavior ◽  
Schrödinger Equations ◽  
Nonlinear Schrödinger ◽  
Pinsky Phenomenon ◽  
Nonlinear Schrodinger Equations ◽  
Linear And Nonlinear ◽  
Short Time

AbstractWe examine the fine structure of the short time behavior of solutions to various linear and nonlinear Schrödinger equations ut = iΔu+q(u) on I×ℝn, with initial data u(0, x) = f (x). Particular attention is paid to cases where f is piecewise smooth, with jump across an (n−1)-dimensional surface. We give detailed analyses of Gibbs-like phenomena and also focusing effects, including analogues of the Pinsky phenomenon. We give results for general n in the linear case. We also have detailed analyses for a broad class of nonlinear equations when n = 1 and 2, with emphasis on the analysis of the first order correction to the solution of the corresponding linear equation. This work complements estimates on the error in this approximation.

Korla pear juice treated by ultrafiltration followed by high pressure processing or high temperature short time

LWT ◽  
2016 ◽  
Vol 65 ◽  
pp. 283-289 ◽  
Author(s):  
Liang Zhao ◽  
Yongtao Wang ◽  
Xiaotong Hu ◽  
Zhijian Sun ◽  
Xiaojun Liao
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
High Pressure Processing ◽  
High Temperature Short Time ◽  
Pear Juice ◽  
Short Time

Effects of high pressure homogenisation of raw bovine milk on alkaline phosphatase and microbial inactivation. A comparison with continuous short-time thermal treatments

2006 ◽  
Vol 73 (4) ◽  
pp. 454-463 ◽  
Author(s):  
Laëtitia Picart ◽  
Maryse Thiebaud ◽  
Malika René ◽  
Joseph Pierre Guiraud ◽  
Jean Claude Cheftel ◽  
...  
Keyword(s):  
High Pressure ◽  
Alkaline Phosphatase ◽  
Micrococcus Luteus ◽  
Bovine Milk ◽  
Microbial Reduction ◽  
Microbial Inactivation ◽  
Thermal Treatments ◽  
Globule Size ◽  
Whole Milk ◽  
Short Time

Raw whole milk of high microbial quality ([les ]4×104 cfu/ml) was processed using a ~15 l/h homogeniser with a high pressure (HP) valve immediately followed by cooling heat exchangers. The effects of homogenisation between 100 and 300 MPa (HP valve) with an initial milk temperature Tin=4 °C or 24 °C was investigated on the inactivation of: (i) endogenous alkaline phosphatase (ALP); (ii) endogenous milk flora and (iii) two Gram positive (Listeria innocua and Micrococcus luteus) and one Gram negative (Pseudomonas fluorescens) strains inoculated into milk. Temperatures T1 and T2 measured before and immediately after the HP valve, and fat globule size distributions were also determined. ALP activity slightly decreased after homogenisation above 250 MPa when Tin=4 °C (corresponding T2>58 °C), but markedly decreased above 200 MPa when Tin=24 °C (T2>60 °C). In contrast to inactivation induced by continuous short-time thermal treatments, ALP inactivation induced by HP homogenisation was clearly due to mechanical forces (shear, cavitation and/or impact) in the HP valve and not to the short ([Lt ]1 s) residence time at temperature T2 in the same valve. Inactivation of the three exogenous microorganisms led to similar conclusions. Homogenisation at 250 MPa or 300 MPa (Tin=24 °C) induced a 2–3 log cycle reduction of the total endogenous milk flora and a 1·5–1·8 log cycle reduction of inoculated List. innocua. Higher reduction ratios (2–4 log cycles) were obtained for the two other microorganisms. The highest levels of ALP inactivation corresponded to the highest extents of microbial reduction. Running the milk twice or three times through the homogeniser (recycling), keeping temperature T1≈29 °C and pressure=200 MPa, increased homogenisation efficiency.

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