Flow Resistance
Optimisation of flow resistance and turbulent mixing over bed forms
... the flow undergoes a skimming flow regime, in which there is little interaction from the vicinity of the roughness element to the outer flow ...the flow in the roughness cavity begins to ...
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Simulation Study of Anisotropic Flow Resistance of Farmland Vegetation
... Darcy-Weisbach resistance coefficient, and Chezy ...overland flow on surfaces with partially submerged plant, and they discovered that when plant cover fractions increase, the Manning’s resistance ...
9
Flow Resistance in Gravel Bed Rivers
... Flow resistance is an expression used in hydraulics to describe the dynamic interaction between the water and the contour in which it ...water flow, causing in turn energy ...the flow ...
5
Significance of Different Flow, Channel and Bed Conditions in Estimation of Open Channel Flow Resistance
... Rhee, D.S., et.al., (2007) used three Korean natural vegetations Zoysia matrella (Korean zoysia), Pennisetum alopecuroides (L.) Spreng. (Korean native vegetation) and Phragmites communis Trin. (Korean reed) in flume ...
5
The Flow Resistance Factor Treated by the Maximum Entropy Principle
... Under these circumstances, in hydraulically rough turbulent flow, the dependence between the “ f ” factor and the relative roughness of the pipe “ k D ” is known. This relation was established at first from the ...
8
Optimised mixing and flow resistance during shear flow over a rib roughened boundary
... A series of numerical investigations has been performed to study the effect of lower boundary roughness on turbu- lent flow in a two-dimensional channel. The roughness spacing to height ratio, w/k, has been ...
13
Flow Resistance in Simulated Irrigation Borders and Furrows
... The data collected and the concept of a critical tip Reynolds number were used to derive an expression for the height of roughness necessary to affect the flow (to cause head losses grea[r] ...
59
An Experimental Study on Effect of Flexibility of Vegetation on Resistance to Flow
... water flow. It has been generally agreed that vegetation increases flow resistance, changes backwater profiles and therefore it has been the subject of several ...studies. Flow ...
5
TREE-TYPE NANOPOROUS FILTERING MEMBRANE WITH COMPLEX PORES
... the flow resistance-reducing pore to that of the branch pore were calculated for practical operational parameter values and different passing liquid-pore wall ...lowest flow resistance of the ...
5
The Development and Application of a New Water Control Technology with Fine Segmentation Features
... both flow theory analysis and physical modeling methods, to reach a conclusion that the axial flow resistance of a gravel packed screen annulus is much higher than its radial flow ...
6
Conceptual Design of Remotely Operated Underwater Vehicle
... Figure 8 shows that the downstream velocity at the side of ROV of Design A was lower than Design B. The larger volume of upper compartment promoted higher flow resistant compared to Design B. This is clearly shown ...
5
Influences of the Preparation Temperature on the Acoustic Parameters of Polyurethane
... the flow resistance and porosity of polyurethane foam, the obtained characteristic parameters, through the Johnson-Allard model and Lafarge-Allard model calculation, the sound absorption coefficient of the ...
7
A methodological approach of estimating resistance to flow under unsteady flow conditions
... the flow resistance ...from flow equa- tions (Ghimire and Deng, 2011; Graf and Song, 1995; Guney et ...on resistance to simpli- fied forms which provide uncertain ...of flow depth. This ...
13
New Insight into Microvascular Perfusion by Analyzing Pipe Flow in a Cylindrical Elastic Shell
... basic flow equation, it cannot be concluded that capillary network flow resistance is less than the ...basic flow equation ( Q = Δ P / R , blood flow = pressure/resistance) ...
7
Evaluation of a Simple Hydraulic Resistance Model Using Flow Measurements Collected in Vegetated Waterways
... (depth, flow velo- city, effective flow resistance) are spatially-averaged over selected lateral regions, as marked in Figure 12 by the four vertical grey bars (each having a width of 50 ...in ...
10
The Role of the Occipital Artery in the Diagnosis of Intracranial Dural Arteriovenous Fistula Using Duplex Sonography
... ⬍60°. Resistance index; peak systolic velocity; and end diastolic velocity of the common carotid artery, proximal ECA, and OA were measured once automatically by sonographic ...The resistance index, which ...
5
THE RELATIONSHIP OF OXYGEN COST OF BREATHING TO RESPIRATORY MECHANICAL WORK AND RESPIRATORY FORCE
... Some workers have increased the pressure component of respiratory work by additions to the external air flow resistance, a procedure which will be referred to hereafter as "resistance br[r] ...
11
Impact of flavonoid-rich black tea and beetroot juice on postprandial peripheral vascular resistance and glucose homeostasis in obese, insulin-resistant men: a randomized controlled trial
... leg resistance vessels and microvessels, whereas beetroot juice led to a decrease in VR at the resistance vessels level ...blood flow and insulin sensitivity in re- sponse to a glucose load in obese, ...
10
Exploiting LSPIV to assess debris-flow velocities in the field
... of flow velocity has a central role in quantitative analysis of debris flows, both for the charac- terization of the phenomenology of these processes and for the assessment of related ...the flow surface) ...
13
Hydrodynamic resistance and flow patterns in the gills of a tilapine fish
... the flow fields to some degree, there are several reasons to believe that results obtained under steady-steady conditions may be ...the flow in the pores formed by the secondary lamellae should be treated ...
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