Results 251 to 260 of about 64,913 (299)
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2016
Skin-friction coefficient is analyzed with consideration of variable physical properties. The skin velocity gradient is the only one unknown variable for evaluation of the skin-friction coefficient. Systems of numerical solutions on the skin velocity gradient are obtained with consideration of variable physical properties.
De-Yi Shang, Liang-Cai Zhong
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Skin-friction coefficient is analyzed with consideration of variable physical properties. The skin velocity gradient is the only one unknown variable for evaluation of the skin-friction coefficient. Systems of numerical solutions on the skin velocity gradient are obtained with consideration of variable physical properties.
De-Yi Shang, Liang-Cai Zhong
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On the skin friction coefficient in viscoelastic wall-bounded flows
International Journal of Heat and Fluid Flow, 2013Abstract Analysis of the skin friction coefficient for wall bounded viscoelastic flows is performed by utilizing available direct numerical simulation (DNS) results for viscoelastic turbulent channel flow. The Oldroyd-B, FENE-P and Giesekus constitutive models are used.
Kostas D. Housiadas, Antony N. Beris
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Evaluation of skin surface associated with morphology and coefficient of friction
International Journal of Cosmetic Science, 1993SynopsisMorphology and coefficient of friction associated with water content in the skin were investigated by a combination method of profilometry and measurement of friction using a newly developed instrument placed on the flexor aspect of the forearm. It was shown that the number of domains enclosed by lines (sulci cutis) on the skin surface per unit
K. NAKAJIMA, H. NARASAKA
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On the Skin Friction Coefficient for a Fully Rough Flat Plate
Journal of Fluids Engineering, 1983A comparison of the Prandtl-Schlichting formula for skin friction of a fully rough plate with recently obtained experimental data shows an average error of 17.5 percent. It is suggested that the reason for this discrepancy is a failure to account for the wake component of the velocity profile. The integral momentum equation is used to derive a new skin
A. F. Mills, Xu Hang
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Measurement of the friction coefficient of the human skin in vivo
Colloids and Surfaces B: Biointerfaces, 2000Abstract Introduction: Quality of smoothness of the skin is the combine result of its mechanical and frictional properties. Methods: A device was developed to characterize such a property in measuring the friction force between a reference material and the skin of the volar forearm.
J Asserin +4 more
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Integral form of the skin friction coefficient suitable for experimental data
Experiments in Fluids, 2010An integral method to evaluate skin friction coefficient for turbulent boundary layer flow is presented. The method replaces streamwise gradients with total stress gradients in the wall-normal direction and is therefore useful in cases when measurements at multiple streamwise locations are not available or feasible.
Faraz Mehdi, Christopher M. White
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Determination of rough-surface skin friction coefficients from wake profile measurements
Experiments in Fluids, 2003A technique for determining the skin friction coefficients from wake profile measurements is described, and is applied to symmetric turbine airfoils with rough surfaces, which operate in a compressible, high-speed flow environment. The procedure involves the measurement of profiles of streamwise momentum in the wakes which form downstream of different ...
Q. Zhang, P. M. Ligrani, S. W. Lee
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Accurate measurements of local skin friction coefficient using hot-wire anemometry
Progress in Aerospace Sciences, 2002Abstract The practicality and accuracy of many existing methods of local skin friction measurement suffer when the boundary layer flow under consideration is non-canonical. Such shortcomings are exacerbated in three-dimensional flows, by the necessity to map local c f over a wider area in order to characterise fully the contribution to global skin
Nick Hutchins, Kwing-So Choi
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The European Physical Journal Plus, 2023
In this article, we constructed Artificial Neural Networking (ANN) models to predict values of the skin friction coefficient for two different flow regimes of non-Newtonian fluid. More specifically, flow of Casson fluid is considered toward an inclined surface with stagnation point and mixed convection effects. Energy equation is considered by means of
Rehman, Khalil Ur +2 more
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In this article, we constructed Artificial Neural Networking (ANN) models to predict values of the skin friction coefficient for two different flow regimes of non-Newtonian fluid. More specifically, flow of Casson fluid is considered toward an inclined surface with stagnation point and mixed convection effects. Energy equation is considered by means of
Rehman, Khalil Ur +2 more
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Skin Friction Coefficient and Boundary Layer Trend on UKM Aster i-Bond
Applied Mechanics and Materials, 2014This study concerns with aerodynamic drag on a passenger car. By using computational fluid dynamics (CFD) method, we found that values of skin friction coefficients for three different parts of the car: front, top and rear parts, are different. This study addresses three different basic possible flows around a car: favourable, zero and adverse pressure
Zambri Harun +10 more
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