Academic literature on the topic 'Macro rough'

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Journal articles on the topic "Macro rough"

1

Fang, Hongwei, Xu Han, Guojian He, and Subhasish Dey. "Influence of permeable beds on hydraulically macro-rough flow." Journal of Fluid Mechanics 847 (May 25, 2018): 552–90. http://dx.doi.org/10.1017/jfm.2018.314.

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In this study, macro-rough flows over beds with different permeability values are simulated using the large-eddy simulation, and the results are analysed by applying the double-averaging (DA) methodology. Spheres of different sizes and arrangements were used to form the beds, which are deemed to be permeable granular beds. The influence of bed permeability on the turbulence dynamics and structure is investigated. It was observed that the scales of the spanwise vortical structures over more permeable beds are larger than those over less permeable beds. This is attributed to large-scale spanwise
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2

Huang, Shiping, and Anil Misra. "Micro–Macro-Shear-Displacement Behavior of Contacting Rough Solids." Tribology Letters 51, no. 3 (2013): 431–36. http://dx.doi.org/10.1007/s11249-013-0178-y.

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3

Erpicum, S��bastien, Tobias Meile, Benjamin J. Dewals, Michel Pirotton, and Anton J. Schleiss. "2D numerical flow modeling in a macro-rough channel." International Journal for Numerical Methods in Fluids 61, no. 11 (2009): 1227–46. http://dx.doi.org/10.1002/fld.2002.

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4

McLauchlin, Theodore. "Desertion, Terrain, and Control of the Home Front in Civil Wars." Journal of Conflict Resolution 58, no. 8 (2014): 1419–44. http://dx.doi.org/10.1177/0022002714547901.

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This article examines desertion in civil wars, focusing on the role of combatants’ hometowns in facilitating desertion. Analyzing data from the Spanish Civil War, the article demonstrates that combatants who come from hill country are considerably more likely to desert than combatants whose hometowns are on flat ground. This is because evasion is easier in rough terrain. The finding implies that the cohesion of armed groups depends on control, not just positive incentives, and that control of territory in civil wars goes beyond rebel–government contestation, and consists also of control behind
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5

Ghilardi, Tamara, Mário J. Franca, and Anton J. Schleiss. "Period and amplitude of bedload pulses in a macro-rough channel." Geomorphology 221 (September 2014): 95–103. http://dx.doi.org/10.1016/j.geomorph.2014.06.006.

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6

Sun, Qingchao, Xiaokai Mu, Bo Yuan, Jiawen Xu, and Wei Sun. "Characteristics extraction and numerical analysis of the rough surface macro-morphology." Engineering Computations 36, no. 3 (2019): 765–80. http://dx.doi.org/10.1108/ec-08-2018-0347.

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PurposeThis paper aims to distinguish the relationship between the morphology characteristics of different scales and the contact performance of the mating surfaces. Also, an integrated method of the spectrum analysis and the wavelet transform is used to separate the morphology characteristics of the actual machined parts.Design/methodology/approachFirst, a three-dimensional (3D) surface profilometer is used to obtain the surface morphology data of the actual machined parts. Second, the morphology characteristics of different scales are realized by the wavelet analysis and the power spectral d
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7

Francisco, Arthur, and Noël Brunetière. "Full and Hybrid Multiscale Lubrication Modeling." Lubricants 10, no. 12 (2022): 329. http://dx.doi.org/10.3390/lubricants10120329.

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The numerical solution for the lubrication of parallel rough surfaces cannot be obtained using the well-known flow factors of Patir and Cheng. Nor can it be determined using homogenization techniques. Is there an alternative, besides a purely long-term deterministic way of solving the problem? The present paper aims at proposing a multiscale approach in order to reduce the computing time, specific to deterministic resolutions, while maintaining good accuracy. The configuration is a parallel rough surface slider, with imposed hydrodynamic operating conditions. The domain consists of independent
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8

Bobji, M. S., and S. K. Biswas. "Deconvolution of hardness from data obtained from nanoindentation of rough surfaces." Journal of Materials Research 14, no. 6 (1999): 2259–68. http://dx.doi.org/10.1557/jmr.1999.0302.

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Variation of hardness with penetration in nanoindentation of a rough surface is a compound effect of variation in asperity geometry with penetration, designated geometric effect, and genuine property gradients with depth as may exist in a near-surface zone. We simulate indentation of a rough surface numerically to elucidate the geometric effects and validate it by some model “macro” experiments. Finally, we formulate a general framework to deconvolute genuine property variation by normalizing the measured hardness with the geometric effect.
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9

MIGNOT, EMMANUEL, E. BARTHELEMY, and D. HURTHER. "Double-averaging analysis and local flow characterization of near-bed turbulence in gravel-bed channel flows." Journal of Fluid Mechanics 618 (January 10, 2009): 279–303. http://dx.doi.org/10.1017/s0022112008004643.

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This investigation focuses on the characteristics of near-bed turbulence in fully rough gravel-bed open-channel flows. The analysis combines results obtained with the double-averaging methodology and local flow characterization, using velocity measurements provided by a high-resolution three-axis Acoustic Doppler Velocity Profiler (ADVP). As a result of the flow heterogeneity induced by the bed topography, the flow is not locally uniform in the near-bed region, and a double-averaging methodology is applied over a length scale much greater than the gravel size. In smooth- and rough-bed flow con
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10

Zha, Fusheng, Chen Chen, Wei Guo, Penglong Zheng, and Junyi Shi. "A free gait controller designed for a heavy load hexapod robot." Advances in Mechanical Engineering 11, no. 3 (2019): 168781401983836. http://dx.doi.org/10.1177/1687814019838369.

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As macroscopic rough terrains are time varying and full of local topographic mutations, stable locomotions of legged robots moving through such terrains in a fixed gait form can be hardly obtained. This problem becomes more severe as the size and weight of the robot increase. An ideal pre-planned gait changing method can also be hardly designed due to the same limitations. Aiming to solve the problem, a new kind of free gait controller applied to a large-scale hexapod robot with heavy load is developed. The controller consists of two parts, a free gait planner and a gait regulator. Based on th
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