نتایج جستجو برای: rough bed
تعداد نتایج: 74612 فیلتر نتایج به سال:
decision support systems (dsss) are prevalent information systems for decision making in many competitive business environments. in a dss, decision making process is intimately related to some factors which determine the quality of information systems and their related products. traditional approaches to data analysis usually cannot be implemented in sophisticated companies, where managers need...
decision support systems (dsss) are prevalent information systems for decision making in many competitive business environments. in a dss, decision making process is intimately related to some factors which determine the quality of information systems and their related products. traditional approaches to data analysis usually cannot be implemented in sophisticated companies, where managers nee...
A step-pool bed morphology often develops in steep mountain streams. The main controlling parameters of step formation and stability are hydraulic forcing, sediment transport, granular effects (i.e., grain-grain interlocking, jamming). Previous studies found macrorough sidewalls to further increase due grain-sidewall interlocking but the effect reduced shear stress caused by sidewall friction w...
flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...
A workflow for developing a multidimensional, linear correlation between the process conditions during fluidized bed spray granulation and surface morphology of resulting granules is presented. Spray coating experiments with Cellets®500 particles sodium benzoate solution were performed in lab-scale varying liquid rate, fluidization air flow temperature, temperature atomization pressure. To char...
1. Habitat heterogeneity in lotic systems is usually associated with the availability of refuges. Heterogeneous habitats (here, rough substrata) should mediate the effect of high-flow disturbances by protecting benthic algae, thus increasing the resistance and resilience of the system. Additionally, the ability of algae to resist a disturbance and recover after it should be dependent on biologi...
Abstract Optimization of all the process parameters for laser powder bed fusion (L-PBF), considering effects individual on Ti6Al4V fabricated parts, can be complex and challenging. Therefore, first time, three main variable (laser power, scan speed, hatch spacing) outcomes (surface roughness, bulk porosity, production rate parts) were studied in this work. Then, combination above-mentioned form...
In this study, a three-dimensional (3D) numerical model based on the smoothed particle hydrodynamics (SPH) approach was developed to simulate near-shore current flows over rough topographic surface in coastal area, where are shallow and demonstrate strong turbulent characteristics. The program is open-source code SPHysics ( http://www.sphysics.org ), two major improvements made treat turbulence...
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