scholarly journals Electrohydrodynamic removal of non-specific colloidal adsorption at electrode interfaces

2014 ◽  
Vol 50 (37) ◽  
pp. 4813-4815 ◽  
Author(s):  
Sakandar Rauf ◽  
Muhammad J. A. Shiddiky ◽  
Matt Trau
Keyword(s):  
Shear Force ◽  
Surface Interactions ◽  
Surface Shear ◽  
Selection Of

This communication reports the use of an electrohydrodynamic surface shear force to selectively manipulate colloid–surface interactions. We demonstrate the selection of strongly (specifically) bound biomolecular-functionalized colloidal beads over more weakly (non-specifically) bound beads.

The boundary layer over an impulsively started flat plate

1969 ◽  
Vol 310 (1502) ◽  
pp. 401-414 ◽  
Keyword(s):  
Boundary Layer ◽  
Leading Edge ◽  
Surface Shear Stress ◽  
Unsteady State ◽  
Similarity Condition ◽  
Surface Shear ◽  
Boundary Layer Problem ◽  
Independent Variables ◽  
Selection Of ◽  
Layer Problem

A numerical solution has been obtained for the development of the flow from the initial unsteady state described by Rayleigh to the ultimate steady state described by Blasius. The usual formulation of the problem in two independent variables is dropped, and three independent variables, in space and time, are reverted to. The boundary-layer problem is unconventional in that the boundary conditions are not completely known. Instead, it is known that the solution should satisfy a similarity condition, and use is made of this to obtain a solution by iteration. A finite-difference technique of a mixed, explicit-implicit, type is employed. The iteration converges rapidly. It is terminated where the maximum errors are estimated to be about 0.04%. A selection of the results for the velocity profiles and the surface shear stress is presented. One striking feature is the rapidity of the transition from the Rayleigh to the Blasius state. The change is practically complete, at a given station on the plate, by the time the plate has moved a distance equal to four times the distance from the station to the leading edge of the plate.

scholarly journals Response of granular-material flow to abrupt change of surface-shear force

1996 ◽  
Vol 40 ◽  
pp. 1045-1050
Author(s):  
Hitoshi GOTOH ◽  
Tetsuo SAKAI ◽  
Yasuharu TOYOTA ◽  
Atsushi SAKAI
Keyword(s):  
Granular Material ◽  
Material Flow ◽  
Shear Force ◽  
Abrupt Change ◽  
Surface Shear

THE INFLUENCES OF THE MATERIAL AND GEOMETRICAL PROPERTIES OF SLIDING PLATE ON ERG EFFECT OF GEL-STRUCTURED ERF

2007 ◽  
Vol 21 (28n29) ◽  
pp. 4751-4757 ◽  
Author(s):  
S. SAITO ◽  
Y. KAKINUMA ◽  
T. AOYAMA ◽  
K. TANAKA ◽  
H. ANZAI
Keyword(s):  
Electric Field ◽  
Flat Plate ◽  
Time Use ◽  
Shear Force ◽  
Metallic Materials ◽  
Geometrical Properties ◽  
Long Time ◽  
The One ◽  
Selection Of ◽  
Sliding Plate

Electro-rheological Fluid (ERF) is the functional fluid that can change its viscoelastic property by applying electric field. However, ERF shows the sedimentation of the ER particles in long time use, and it caused the unstable ER effect. The Gel-structured ERF (ERG) has been developed to solve this problem. When a metallic flat plate is placed on the ERG sheet, ERG shows the high shear force due to the occurrence of the contact between the gel and the plate in response to the applying electric field (ERG effect). ERG effect can be obtained not only for metallic materials but also non-metallic materials by applying the one-sided electrode, and the ER effect is supposed to be considerably influenced by the material and geometrical properties of flat plate on the ERG sheet. In this study, the influences of the material and geometrical properties of sliding plate are experimentally analyzed from the viewpoint of the relative permittivity, surface roughness and flatness, and the design instruction for the selection of materials and their geometrical issues are proposed.

scholarly journals Selection of materials for biofouling detection in cooling water systems

2017 ◽  
Vol 18 (4) ◽  
pp. 1162-1172
Author(s):  
Joana Melo Mota ◽  
Maria Diná Afonso
Keyword(s):  
High Density Polyethylene ◽  
Vibration Amplitude ◽  
Food Industry ◽  
Cooling Water ◽  
Water Systems ◽  
Vibration Sensor ◽  
Surface Shear Stress ◽  
Surface Shear ◽  
Effective Roughness ◽  
Selection Of

Abstract This work aimed to select materials capable of favouring biofouling build-up in order to develop plain coupons as alternative to expensive commercial biofouling mesh coupons. Plain coupons of copper, stainless steel (SS), polyvinyl chloride (PVC) and high density polyethylene (HDPE) were dipped and tested in a cooling water from a food industry. PVC and HDPE coupons showed promising responses and appear to be preferable since they are corrosion-free. Moreover, an experimental vibration sensor monitored biofilm adhesion on SS and PVC tubular coupons (simulators of the respective sensor tubes), inside which flowed the water aforementioned. The SS sensor tube and tubular coupons displayed the most satisfactory results, i.e. the highest vibration amplitude and the highest adhered biofilm mass, respectively. Biofilm adhesion onto the materials tested depended on their surface shear stress, effective roughness and hydrophobicity, as determined by scanning electron microscopy and goniometry.

Influence of time of measurement post mortem on the near infra-red spectra of beef Longissimus dorsi and prediction of tenderness

2009 ◽  
Vol 2009 ◽  
pp. 115-115
Author(s):  
B W Moss ◽  
A Gordon
Keyword(s):  
Shear Force ◽  
Early Stage ◽  
Eating Quality ◽  
Longissimus Dorsi ◽  
Post Mortem ◽  
Infra Red ◽  
Design And Manufacture ◽  
Selection Of

Prediction of eating quality of beef at an early stage post mortem would enable selection of carcases for specific markets. Shackelford (2004) reported the design of near infra red (NIR) equipment suitable for measurement of larger areas of the muscle and also the prediction of 14 day slice shear force values from NIR measurements made at 2 days post slaughter (Shackelford 2005). The aim of the present study was to evaluate the use of equipment of a similar design and manufacture to that used by Shackelford et al (2005), to evaluate repeatability and time of measurement of NIR spectra on the prediction of Warner-Bratzler Shear force values.

Potential of NIR spectroscopy for prediction of tenderness of beef sirloin

2009 ◽  
Vol 2009 ◽  
pp. 114-114
Author(s):  
B W Moss ◽  
A Gordon ◽  
K Matthews ◽  
D Homer ◽  
P Hadley
Keyword(s):  
Shear Force ◽  
Early Stage ◽  
Nir Spectroscopy ◽  
Eating Quality ◽  
Post Mortem ◽  
The Usa ◽  
Design And Manufacture ◽  
Selection Of

Prediction of eating quality of beef at an early stage post mortem would enable selection of carcases for specific markets. Shackelford et al (2004) reported the design of NIR equipment suitable for measurement of larger areas of the muscle and also the prediction of 14 day slice shear force values from NIRRS measurements made at 2 days post slaughter (Shackelford 2005). The aim of the present study was to evaluate the use of equipment of a similar design and manufacture to that used by Shackelford et al (2005), to predict Warner-Bratzler Shear force values in carcases with a smaller range of marbling than found in the USA.

Comparison of storage potential of five asparagus cultivars (Asparagus officinalis L.).

1993 ◽  
Vol 73 (2) ◽  
pp. 601-606 ◽  
Author(s):  
Najeh Dali ◽  
Yves Desjardins ◽  
Claude Willemot
Keyword(s):  
Shelf Life ◽  
Key Words ◽  
Chlorophyll Content ◽  
Respiration Rate ◽  
Shear Force ◽  
Visual Assessment ◽  
Asparagus Officinalis ◽  
Storage Potential ◽  
Selection Of

The objective of this study was to establish simple variables for the selection of asparagus (Asparagus officinalis L.) cultivars with good storage potential. Five asparagus cultivars, 277E-22-8, Jersey Giant, Larac, Viking KB3 and 70-207 were stored at 1 °C for 0, 7, 14 and 21 d. At each sampling date chlorophyll content, rate of respiration and shear force were measured. Cladophyll expansion, presence of mold and blue hue of the stem were visually assessed. Jersey Giant and 277E-22-8 had the best storage potential and were still commercially acceptable after 3 wk of storage. They differed from Larac in visual assessment, particularly cladophyll expansion, and toughness of the spear. The chlorophyll content and respiration rate were not reliable indicators of storage potential. Key words: Asparagus officinalis, shelf-life, storage, toughness, respiration, chlorophyll

Simulation Study for Heat Transfer Performance of Spiral Flow Double-Pipe Heat Exchanger

2012 ◽  
Vol 550-553 ◽  
pp. 3024-3028
Author(s):  
Yi Ning Wang ◽  
Qun Hui Lu ◽  
Yang Yan Zheng ◽  
Biao Yuan
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Shear Force ◽  
Heat Transfer Performance ◽  
Engineering Application ◽  
Transfer Performance ◽  
Spiral Flow ◽  
Surface Shear ◽  
Double Pipe ◽  
Pipe Heat

In this article, simulation analysis has been performed for the flow and heat transfer performance of spiral flow double-pipe heat exchanger using finite volume method, respectively for the relationship between Nu and the average shear force on inner pipe outer wall at different turbulent flow Re with different radial offset of inlet and outlet pipes and different spacing of inlet and outlet pipes. The results show that, as compared with an ordinary double-pipe heat exchanger, in a spiral flow double-pipe heat exchanger, both inner pipe convective heat exchange coefficient and inner pipe wall surface shear force are lower, with the magnitude of reduction related to a number of factors such as radial offset of inlet and outlet pipes and Re. The study in this article has provided theoretical basis for further engineering application of spiral flow double-pipe heat exchangers.

Industrial Test on Shearing Force of Rolling Shear

2010 ◽  
Vol 145 ◽  
pp. 462-466
Author(s):  
Li Feng Ma ◽  
Jian Mei Wang ◽  
Qing Xue Huang
Keyword(s):  
Shear Force ◽  
Optimization Design ◽  
Large Scale ◽  
Steel Plate ◽  
Industrial Test ◽  
Test Results ◽  
Shearing Force ◽  
Rolling Shear ◽  
Structure Strength ◽  
Selection Of

The accuracy of the max shear force of rolling shear is of vital importance to the proper selection of motor power and the optimization design of structure strength. The test on shear force during the shearing process of stainless steel was done on 3000 mm cut-to-length rolling shear of some Large-scale Iron & Steel Co., Ltd. The test results have shown that the weight of upper-blade carrier can bring about the fluctuation of measuring signals of shearing force at the start and end instants. Meanwhile, the shear force during the shearing process will gradually increase with the increment relative cut-in depth, and the process from the bite-in of upper blade into steel plate to the fracture of steel plate is very short, thus the link force on the side of firstly-fallen-off blade will initially increase and then will decrease by large increment amplitude. The shear force at the cut-in stage will dramatically increase. During the cut-in stage, the shear force is basically a constant due to the constant shear angle. In summary, the above test results have important referential value to the calculation of shear force and the design of structure strength.

Cognitive gadgets and cognitive priors

2019 ◽  
Vol 42 ◽  
Author(s):  
Gian Domenico Iannetti ◽  
Giorgio Vallortigara
Keyword(s):  
Cognitive Neuroscience ◽  
Selection Of

Abstract Some of the foundations of Heyes’ radical reasoning seem to be based on a fractional selection of available evidence. Using an ethological perspective, we argue against Heyes’ rapid dismissal of innate cognitive instincts. Heyes’ use of fMRI studies of literacy to claim that culture assembles pieces of mental technology seems an example of incorrect reverse inferences and overlap theories pervasive in cognitive neuroscience.

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