Relative Roughness
Investigating the Effect of Relative Depth and Relative Roughness on Momentum Transfer in Symmetric Rectangular Compound Channels with Varius Relative Width
... the relative depth investigated the effect of these parameters on shear stress in a compound ...the relative depth on the shear stress, they came to the conclusion that by increasing the relative ...
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A Meta-Heuristic Approach for Optimization of Different Parameter of a Solar Air Heater with Artificial Roughness
... of Relative roughness pitch, Relative roughness height, Relative groove position, chamfered angle and Reynolds number by using Teaching Learning base optimization ...
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Performance Analysis of solar air heater having absorber plate artificially roughened by chamfered-square elements
... the relative roughness pitch, cross sectional area and relative roughness height, increases the value of Nusselt ...artificial roughness element is found to be more effective in a sense ...
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W Discrete Rib for Enhancing the Thermal Performance of Solar Air Heater
... in relative roughness height results in an increase in heat transfer coefficient and also friction ...for relative roughness height of ...
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Correlation for Nusselt Number and Friction Factor for Solar Air Heater Having Absorber Roughened by Chamfered-square Elements
... artificial roughness on absorber plate to improve the thermal performance of a solar air heater is very common now ...artificial roughness by imbedded element in the absorber plate of the ...as ...
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Enhancement of the heat transfer rate in free convection solar air heater using pin shaped artificial roughness on absorber plate
... Figure-6. The graph of Nusselt number with respect to relative roughness height at various inclination angles. As discussed earlier the Nusselt number is the highest at an angle of 50 degrees after which ...
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A Review of Experimental study & analysis of solar air heater
... the roughness element small in comparison with the duct ...the roughness, the roughness element height (e) and pitch (p) are the most important ...namely, relative roughness height ...
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An Experimental Investigation of Thermal Performance of Solar Air Heater with W Wire Mesh
... artificial roughness with W-shaped geometry as shown in figure ...450, relative roughness height(e/Dh) is fixed0.044 and relative roughness pitch (p/e) is varies from 5 to ...at ...
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Investigating the Effect of Relative Width on Momentum Transfer between Main Channel and Floodplain in Rough Rectangular Compound Channel Sunder Varius Relative Depth Condition
... the relative width and rela- tive depth parameters decreases the percentage of apparent shear stress and an increase in the relative roughness causes it to be increased ...
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Heat Transfer Enhancement of Solar Air Heater By Using Artificial Roughness double inclined ribs
... The optimum parameter has been used in the present experiment as was discussed in the literature sandeep at al. (2015) . Relative roughness pitch (P/e , wire diameter (e)=1mm, width of absorber plate ...
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Computational Analysis of an artificial roughened surface of Solar Air heater
... ABSTRACT: In this paper computational thermal analysis (CFD) of solar air heater equipped with an artificial roughened surface has been investigated using FEV approach. The effect of square shape geometry on heat ...
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Comparing the relative volume with the relative inradius and the relative width
... oldest relative geometric inequalities that were investigated are the so-called rel- ative isoperimetric ...the relative volume (the minimum between the volume of E and the volume of its complement) and the ...
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Arctic sea ice surface roughness derived from multi-
... To assign a quantitative roughness value to the MISR angular reflectance data, we require 105.. measurements of sea ice surface roughness over a wide range of roughness val[r] ...
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Human Roughness Perception and Possible Factors Effecting Roughness Sensation
... Tasks 1 to 4 involved plaques which were submerged in different solutions so that a thin layer of lubricant was presented during the finger tactile test to investigate the effect of the lubricants’ viscosity and ...
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Vertical stresses within granular materials in silos
... wall roughness and internal friction angle of the material being ...a relative density of 30% (Table 1). Two different wall roughness conditions were used to study the wall roughness as (1) ...
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Effect of accelerated aging treatment on a surface property and dynamic mechanical properties of commercial wood-based panels
... Surface roughness degradation is associated with dimensional changes owing to swelling–shrinkage phase during aging treatments [26]. Each panel had different extent and course of change in TS following the aging ...
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Discharge and location dependency of calibrated main channel roughness: case study on the river Waal and IJssel
... channel roughness expressed by the Manning coefficient is studied using two case studies on the River Waal and IJssel in the ...channel roughness is mostly dependent on the discharge. Increasing ...
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Quantifying bed roughness beneath contemporary and palaeo-ice streams
... A 30 × 10 km grid is too widely spaced to capture bed roughness of some landform assemblages. The question of what grid size should be used is an important one. The Ullapool megagrooves for example, cover an area ...
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Arching in granular materials with particular reference to inclined mine stopes
... 149 application of interface elements in the numerical model allowed for possible relative slip between the fill and the wall. The numerical results were validated with experimental results in Chapter 5 and the ...
203
Assessment of wood surface roughness: comparison of tactile roughness and three-dimensional parameters derived using a robust Gaussian regression filter
... surface roughness – one parameter for the distribution of roughness-profile peaks and the other for the relative area of the roughness-profile peaks above the threshold height – were compared ...
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