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The development of the friction coefficient inspection equipment for skin using a load cell
2008 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2008The skin is an indispensible organ for human because it contributes to the metabolism using its own biochemical functions as well as it protects the human body from the exterior stimuli. Recently, the friction coefficient have been used as the decision index of the progress for the bacterial aliments in the field of the skin physiology and the ...
Han Wook, Song +5 more
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Skin friction coefficient change on cement grouts for micropiles due to sulfate attack
Construction and Building Materials, 2018Abstract This paper presents a study of skin friction change of cement pastes used for micropiles as a geotechnical foundation when grout surface is affected by sulfate attack. In this research skin friction coefficient between cement paste – cement paste was measured, studying change in friction depending on the initial roughness of samples.
José L. Pastor +3 more
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Effect of Local Flow Parameters on Skin-Friction Coefficient in Hypersonic Airbreathing Engines
Journal of Propulsion and Power, 2012Effects of Rex, Re , Tw=Taw, and Me on the local skin-friction coefficient (Cf ) in a hypersonic airbreathing combustor with various combustion modes were examined. Measurements were performed in the hypersonic airbreathing combustor with airflowMach number and unit Reynolds numbers at the entrance of combustor of 2.5 and 1:6 10 3:5 10 m , respectively.
Taira Tsuru +5 more
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Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2014
Prosthetic devices are used to restore as much as possible not only the functionality, but also the self-esteem of patients who have been submitted to amputation surgeries. Typically, lower limb prostheses need a socket to act as a link with the human stump, so the contact stresses at the socket–stump interface are critical for the recovery process ...
Juan F Ramírez +2 more
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Prosthetic devices are used to restore as much as possible not only the functionality, but also the self-esteem of patients who have been submitted to amputation surgeries. Typically, lower limb prostheses need a socket to act as a link with the human stump, so the contact stresses at the socket–stump interface are critical for the recovery process ...
Juan F Ramírez +2 more
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Image-based modelling of the skin-friction coefficient in compressible boundary-layer transition
Journal of Fluid Mechanics, 2019We develop a model of the skin-friction coefficient based on scalar images in the compressible, spatially evolving boundary-layer transition. The images are extracted from a passive scalar field by a sliding window filter on the streamwise and wall-normal plane.
Wenjie Zheng +4 more
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Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2014
Human skin is characterised by a complex and highly variable friction behaviour. Although the variation of friction coefficients measured for skin depends on numerous parameters related to the skin itself, the surface in contact as well as contact conditions, water or sweat – either bound in the stratum corneum and manifest as skin hydration or in ...
S Derler, RM Rossi, G-M Rotaru
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Human skin is characterised by a complex and highly variable friction behaviour. Although the variation of friction coefficients measured for skin depends on numerous parameters related to the skin itself, the surface in contact as well as contact conditions, water or sweat – either bound in the stratum corneum and manifest as skin hydration or in ...
S Derler, RM Rossi, G-M Rotaru
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Skin Research and Technology, 2004
Introduction: The objective of this study was to investigate whether hydrophilic/hydrophobic balance (Hi/Ho) of the skin surface strongly modifies the friction coefficient (μ). The Hi/Ho balance is determined using the relationship between the critical surface tension γc (Zisman's principle: which delimits the wetting capacity) and the surface ...
Elkhyat, A. +3 more
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Introduction: The objective of this study was to investigate whether hydrophilic/hydrophobic balance (Hi/Ho) of the skin surface strongly modifies the friction coefficient (μ). The Hi/Ho balance is determined using the relationship between the critical surface tension γc (Zisman's principle: which delimits the wetting capacity) and the surface ...
Elkhyat, A. +3 more
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Turbulent Skin-Friction Coefficient and Momentum Thickness in Adverse Pressure Gradient
Journal of Aircraft, 1969taken in drawing conclusions from the data of Linke, as drawn in Fig. 2, since it is calculated from experimentally obtained results for the total and pressure drag coefficients, and not by direct measurements of the skin-friction. Figure 3 is a typical plot of the data of Linke for total and pressure drag coefficients. As can be seen from this figure,
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Aeronautical Quarterly, 1968
SummaryIn this note a relation is established between the correlation parameters obtained by Cohen and Reshotko from similar solutions of the compressible laminar boundary layer, and the Pohlhausen-type pressure gradient parameter used in the approximate methods devised by Luxton and Young.
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SummaryIn this note a relation is established between the correlation parameters obtained by Cohen and Reshotko from similar solutions of the compressible laminar boundary layer, and the Pohlhausen-type pressure gradient parameter used in the approximate methods devised by Luxton and Young.
openaire +1 more source