Results 11 to 20 of about 79,589 (237)
Understanding Laser Powder Bed Fusion Surface Roughness [PDF]
Journal of Manufacturing Science and Engineering, 2020 Abstract Surface roughness is a well-known consequence of additive manufacturing methods, particularly powder bed fusion processes. To properly design parts for additive manufacturing, a comprehensive understanding of the inherent roughness is necessary.
Jacob C. Snyder, Karen A. Thole
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Compensating errors in inversions for subglacial bed roughness: same steady state, different dynamic response [PDF]
The Cryosphere, 2023 Subglacial bed roughness is one of the main factors controlling the rate of future Antarctic ice-sheet retreat and also one of the most uncertain. A common technique to constrain the bed roughness using ice-sheet models is basal inversion, tuning the ...
C. J. Berends +4 more
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Applied Sciences, 2023 The accurate and efficient estimation of bed roughness using limited historical observational data is well-established. This paper presents a new parameter-inversion model for estimating bed roughness in hydrodynamic models that constrains the roughness ...
Yifan Chen +3 more
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Equivalent Roughness of Gravel-Bed Rivers [PDF]
Journal of Hydraulic Engineering, 2008 The relation between the equivalent roughness and different grain size percentiles of the sediment in gravel-bed rivers was determined under the hypothesis that the vertical distribution of the flow velocity follows a logarithmic law. A set of 954 data points was selected from rivers with gravel size sediment or larger, with a non-sinuous alignment and
López Alonso, Raúl +1 more
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Journal of Hydrology and Hydromechanics, 2023 The aim of the study was to assess the possibility of using the empirical formulas to determine the roughness coefficient in gravel-bed streams, the bed slopes of which range from 0.006 to 0.047.
Zwolenik Monika, Michalec Bogusław
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Shanghai Jiaotong Daxue xuebao, 2021 In both the natural environment and hydraulic engineering, there widely exists the phenomenon of gravity current. In practical conditions, most beds are covered with gravel and sediment particles of different sizes, which can be regarded as rough bed ...
HAN Dongrui +5 more
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Dune dynamics and roughness under gradually varying flood waves, comparing flume and field observations [PDF]
Advances in Geosciences, 2014 Accurate forecasts of bed forms and their roughness during a flood wave are essential for flood management. Bed forms remain dynamic even under steady discharge and are subject to a continuous process of creations and destructions of individual bed forms.
J. J. Warmink
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Tikrit Journal of Engineering Sciences, 2022 One of the significant problems facing the water resource engineer is calculating the coefficient of roughness for subsequent design calculations of the discharge amount of a channel or river. In this study, experiments were conducted in a semi-circular,
Raad Hoobi Irzooki, Ayad Saoud Najem
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On gravel‐bed roughness characterization [PDF]
Water Resources Research, 1998 The random field approach for gravel‐bed roughness characterization, which is based on the presentation of bed elevations as a three‐dimensional random field, is justified as an alternative to the characteristic particle size approach. We first show that the bed elevation distribution is close to Gaussian and then investigate gravel‐bed roughness using
Vladimir I. Nikora +2 more
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Experimental Investigation of Water Entrainment of Salty Density Current Over the Bed with Cubic Roughness [PDF]
علوم و مهندسی آبیاری, 2018 Each year rivers transport a lot of sediments, especially for flood times, to dams’ reservoirs and the main cause for this transportation is density current phenomenon.
Hadi Davoodi Beni +2 more
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