Flow-induced vibration of a locally rough cylinder with two symmetrical strips attached on its surface: Effect of the location and shape of strips

2018 ◽  
Vol 72 ◽  
pp. 122-140 ◽  
Author(s):  
Hongjun Zhu ◽  
Yue Gao ◽  
Tongming Zhou
Keyword(s):  
Surface Effect ◽  
Flow Induced Vibration

Flow-induced vibration of double bonded visco-CNTs under magnetic fields considering surface effect

2014 ◽  
Vol 86 ◽  
pp. 144-154 ◽  
Author(s):  
A. Ghorbanpour Arani ◽  
S. Amir ◽  
P. Dashti ◽  
M. Yousefi
Keyword(s):  
Magnetic Fields ◽  
Surface Effect ◽  
Flow Induced Vibration

The Effect of Pentosan Polysulphate (SP54) on the Fibrinolytic Enzyme System - A Human Volunteer and Experimental Animal Study

1985 ◽  
Vol 54 (04) ◽  
pp. 833-837 ◽  
Author(s):  
N A Marsh ◽  
P M Peyser ◽  
L J Creighton ◽  
M Mahmoud ◽  
P J Gaffney
Keyword(s):  
Plasminogen Activator ◽  
Surface Effect ◽  
Ex Vivo ◽  
Vena Cava ◽  
Tissue Type ◽  
Similar Response ◽  
Small Contribution ◽  
Thrombosis Model ◽  
Pentosan Polysulphate

SummaryPentosan polysulphate causes an increase in plasminogen activator activity in plasma both after oral ingestion and after subcutaneous injection. The effect is greatest after 3 h and has disappeared by 6 h. Repeat doses by mouth over 5 days elicit a similar response. The recorded increase in activity is due largely to the release of tissue-type plasminogen activator (tPA) from the endothelium according to the antigen assay although there could be a small contribution from Factor XH-related “intrinsic” fibrinolysis induced in vitro. SP54 enhances activity ex vivo by a non-specific surface effect, and this phenomenon may contribute the increased levels of activity seen in vitro. Administration of SP54 to animals elicits a similar increase in activator activity, the intramuscular route being slightly more effective. Results with an inferior vena cava thrombosis model in the rat suggest that pentosan polysulphate may induce a thrombolytic effect.

UJI TARIK HIDRODINAMIKMODEL KAPAL BERSAYAP WiSE DENGAN LAMBUNG DASAR BERSTEP

2013 ◽  
Vol 12 (3) ◽  
Author(s):  
Iskendar Iskendar ◽  
Andi Jamaludin ◽  
Paulus Indiyono
Keyword(s):  
Comparative Study ◽  
Model Test ◽  
Hydrodynamic Model ◽  
Surface Effect ◽  
Center Of Gravity ◽  
Test Results ◽  
Flat Bottom ◽  
Towing Tank ◽  
Test Models ◽  
Wetted Surface Area

This paper describes hydrodynamic model tests of Wing in Surface Effect (WiSE) Craft. These craft  was fitted with  stephull  form in different location on longitudinal flat bottom (stepedhull planning craft) to determine the influences of sticking and porpoising motion performances. These motions are usually occured when the craft start to take-off from water surfaces. The test models with scale of 1 : 7 were comprised of 4 (four) stephull models and 1 (one) non-stephull model  as a comparative study. The hydrodynamic  tests were performed with craft speed of 16 – 32 knots (prototype values) in Towing Tank at UPT. Balai Pengkajian dan Penelitian Hidrodinamika (BPPH), BPPT, Surabaya. The resistance (drag) was measured by dynamo meter and the trim of model (draft changing at fore and aft  of model due to model speed) was measured by trim meter. By knowing the value of model trim, the wetted surface area can be determined. Then, the lift forces were calculated based on these measured values. The model test results were presented on tables and curves.  Test results show that models  with step located far away from center of gravity of the WiSE craft tend to porpoising and sticking condition, except if the step location on the below of these center of gravity. While model without step tends to sticking conditions.

Flow-induced vibration of a trapezoidal cylinder at low Reynolds numbers

2021 ◽  
Vol 33 (5) ◽  
pp. 053602
Author(s):  
Shubiao Wang ◽  
Wenming Cheng ◽  
Run Du ◽  
Yupu Wang ◽  
Qingrong Chen
Keyword(s):  
Reynolds Numbers ◽  
Flow Induced Vibration ◽  
Low Reynolds Numbers ◽  
Low Reynolds

scholarly journals Energy harvesting from flow-induced vibration of a low-mass square cylinder with different incidence angles

AIP Advances ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 025126
Author(s):  
Peng Han ◽  
Qiaogao Huang ◽  
Guang Pan ◽  
Wei Wang ◽  
Tianqi Zhang ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Square Cylinder ◽  
Flow Induced Vibration ◽  
Low Mass

scholarly journals Operando surface science methodology reveals surface effect in charge storage electrodes

2020 ◽  
Author(s):  
Chao Wang ◽  
Yanxiao Ning ◽  
Haibo Huang ◽  
Shiwen Li ◽  
Chuanhai Xiao ◽  
...  
Keyword(s):  
Surface Science ◽  
Electrode Surface ◽  
Surface Effect ◽  
Specific Capacity ◽  
Surface Region ◽  
Charge Storage ◽  
Energy Storage Devices ◽  
Graphite Cathode ◽  
Surface And Interface ◽  
Science Methodology

Abstract Surface and interface play critical roles in energy storage devices, calling for operando characterization techniques to probe the electrified surfaces/interfaces. In this work, surface science methodology including electron spectroscopy and scanning probe microscopy has been successfully applied to visualize electrochemical processes at operating electrode surfaces in an Al/graphite model battery. Intercalation of anions together with cations is directly observed in surface region of the graphite electrode with tens of nanometers thickness, whose concentration is amazingly one order higher than that in bulk. An intercalation pseudocapacitance mechanism and a double specific capacity in the electrode surface region are expected based on the super-dense intercalants and anion/cation co-intercalation, which are in sharp contrast with the battery-like mechanism in the electrode bulk. The distinct electrochemical mechanism at electrode surface is well verified by performance tests of real battery devices, showing that surface-dominant nanometer thick graphite cathode outperforms bulk-dominant micrometer thick graphite cathode. Our findings highlight the important surface effect of working electrodes in charge storage systems.

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