scholarly journals EXPERIMENTAL STUDY ON INFLUENCE OF BED MATERIAL ON FLOW VELOCITY DISTRIBUTION INSIDE RIGID VEGETATED AREA

2018 ◽  
Vol 74 (1) ◽  
pp. 38-50
Author(s):  
Atsuko MIZOGUCHI
Keyword(s):  
Experimental Study ◽  
Velocity Distribution ◽  
Flow Velocity ◽  
Bed Material

scholarly journals Vessel Sampling and Blood Flow Velocity Distribution With Vessel Diameter for Characterizing the Human Bulbar Conjunctival Microvasculature

2016 ◽  
Vol 42 (2) ◽  
pp. 135-140 ◽  
Author(s):  
Liang Wang ◽  
Jin Yuan ◽  
Hong Jiang ◽  
Wentao Yan ◽  
Hector R. Cintrón-Colón ◽  
...  
Keyword(s):  
Blood Flow ◽  
Velocity Distribution ◽  
Flow Velocity ◽  
Blood Flow Velocity ◽  
Vessel Diameter

Experimental study of transient friction characteristics and velocity distribution of pulsatile flow in rod bundles

2020 ◽  
Vol 140 ◽  
pp. 107124 ◽  
Author(s):  
Xing Li ◽  
Peiyao Qi ◽  
Sichao Tan ◽  
Dongyang Li ◽  
Yitung Chen ◽  
...  
Keyword(s):  
Experimental Study ◽  
Velocity Distribution ◽  
Pulsatile Flow ◽  
Rod Bundles ◽  
Friction Characteristics

Numerical Simulation of Impacts of Different Types of Air Duct Outlets on Ventilation Efficiency

2013 ◽  
Vol 438-439 ◽  
pp. 1098-1103
Author(s):  
Chun Zi Nan ◽  
Ji Ming Ma ◽  
Luo Zhao
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Velocity Distribution ◽  
Flow Velocity ◽  
Numerical Method ◽  
Concentration Effect ◽  
Mixing Zone ◽  
Mixing Effect ◽  
Ventilation Efficiency ◽  
Different Types

To enhance the exhaust efficiency during ventilation, three types of air duct outlets were imported. According to the characteristics of velocity distribution simulated by numerical method, the flow field is divided into the mixing zone and the exhaust zone. The gradual contracted air duct outlet can enhance the mixing effect between fresh air and smoke. In the exhaust zone, however, the flow velocity on the upper section of the tunnel is weakened, which is unfavorable for smoke exhaust. Gradual expanded air duct outlet, on the contrary, may weaken the concentration effect of the airflow. The flow velocity on the upper section of the tunnel is increased in the exhaust zone, thus the flow field is more homogenized, which is in favor of smoke exhaust.

Experimental Study of Vortex Shedding From a Solid Sphere in Turbulent Freestream

2005 ◽  
Author(s):  
Himanshu Tyagi ◽  
Rui Liu ◽  
David S.-K. Ting ◽  
Clifton R. Johnston
Keyword(s):  
Experimental Study ◽  
Reynolds Number ◽  
Flow Velocity ◽  
Vortex Shedding ◽  
Isotropic Turbulence ◽  
Vortex Formation ◽  
Perforated Plate ◽  
Solid Sphere ◽  
Mean Flow ◽  
Static Pressure Distribution

The study of vortex shedding from a sphere assumes an important role because of its relevance to numerous aerodynamic and hydrodynamic applications. Parameters such as coefficient of drag and static pressure distribution are largely influenced by vortex shedding, and it is found by past studies that the freestream turbulence can interact and alter the vortex formation and shedding drastically. Most of these studies, however, were conducted in the low Reynolds number regime and the vortex shedding results had been described only qualitatively. To better understand the aerodynamics of a sphere in turbulent flow, an experimental study was initiated in a low speed wind tunnel to quantify the vortex shedding characteristics. The Reynolds number of the flow, based on the diameter of the sphere (d), was set at 3.3 × 104, 5 × 104 and 6.6 × 104 by varying the mean flow velocity. The sphere was placed at 20D (= 7.5d) downstream from a perforated plate, where D = 37.5 mm is the size of the holes in the perforated plate, uniquely designed for generating near-isotropic turbulence. Hot-wire measurements were taken at 10D (= 3.75d), 20D (= 7.5d) and 30D (= 11.25d) downstream of the sphere in absence and presence of the perforated plate. The vortex shedding frequency was deduced from the instantaneous flow velocity data.

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