The effect of unsteady flow rate increase on in vitro mouth–throat deposition of inhaled boluses

2006 ◽  
Vol 37 (10) ◽  
pp. 1222-1233 ◽  
Author(s):  
B. Grgic ◽  
A.R. Martin ◽  
W.H. Finlay
Keyword(s):  
Unsteady Flow ◽  
Flow Rate ◽  
Rate Increase ◽  
Flow Rate Increase

scholarly journals Influence of Blade Wrap Angle on the Hydrodynamic Radial Force of Single Blade Centrifugal Pump

2021 ◽  
Vol 11 (19) ◽  
pp. 9052
Author(s):  
Linwei Tan ◽  
Yongfei Yang ◽  
Weidong Shi ◽  
Cheng Chen ◽  
Zhanshan Xie
Keyword(s):  
Centrifugal Pump ◽  
Flow Rate ◽  
High Efficiency ◽  
Rate Increase ◽  
Radial Force ◽  
Horizontal Component ◽  
Flow Rate Increase ◽  
Wrap Angle ◽  
External Characteristics ◽  
Blade Wrap Angle

To investigate the effect of blade wrap angle on the hydrodynamic radial force of a single blade centrifugal pump, numerical simulation is conducted on the pumps with different blade wrap angles. The effect of the wrap angle on the external characteristics and the radial force of a single blade centrifugal pump was analyzed according to the simulation result. It is found that, with the increase of the blade wrap angle, the head and efficiency of the single blade centrifugal pump are improved, the H-Q curve becomes steeper, and the efficiency also increased gradually, while the high-efficiency area is narrowed. The blade wrap angle has a great effect on the radial force of the single blade centrifugal pump. When the blade wrap angle is less than 360°, the horizontal component of the radial force is negative and the value is reduced with the increase of the wrap angle of the blade. When the wrap angle is larger than 360°, the horizontal component of the radial force is positive and the value increases with the increase of the wrap angle. Under part-loading conditions, the radial force of the single blade pump is significantly reduced with the increase of the blade wrap angle. When the wrap angle is smaller than 360°, the radial force decreases with the flow rate increase. In the condition that the wrap angle is larger than 360°, the radial force increases with the flow rate increase.

Effect of Flow Rate Increase on the Performance of a Pilot-Scale Biological Nutrient Removal Reactor

2018 ◽  
Vol 144 (5) ◽  
pp. 04018022 ◽  
Author(s):  
Kingsley Nze ◽  
Shengnan Xu ◽  
Yao Tang ◽  
Abdul Mohammed ◽  
Yang Liu
Keyword(s):  
Flow Rate ◽  
Nutrient Removal ◽  
Rate Increase ◽  
Pilot Scale ◽  
Biological Nutrient Removal ◽  
Flow Rate Increase

The gas flow rate increase obtained by an oscillating piezoelectric actuator on a micronozzle

2008 ◽  
Vol 144 (1) ◽  
pp. 154-160 ◽  
Author(s):  
R.S. Wiederkehr ◽  
M.C. Salvadori ◽  
J. Brugger ◽  
F.T. Degasperi ◽  
M. Cattani
Keyword(s):  
Flow Rate ◽  
Piezoelectric Actuator ◽  
Gas Flow ◽  
Rate Increase ◽  
Gas Flow Rate ◽  
Flow Rate Increase

scholarly journals EKSPERIMEN PEMBENTUKAN KERAK GIPSUM PADA PIPA BERALIRAN LAMINIR DENGAN PARAMETER LAJU ALIR DAN ADITIF ION CU2+ : KAJIAN KINETIS

2012 ◽  
Vol 16 (3) ◽  
pp. 152
Author(s):  
Wiji Mangestiyono ◽  
A.P. Bayuseno ◽  
Stefanus Muryanto
Keyword(s):  
Kinetic Study ◽  
Flow Rate ◽  
Production Cost ◽  
Reaction Rate ◽  
Rate Increase ◽  
Industrial Process ◽  
Reaction Rate Increase ◽  
Rate Decrease ◽  
Flow Rate Increase ◽  
Gypsum Scaling

Wiji Mangestiyono, , A.P. Bayuseno, Stefanus Muryanto, in this paper explain that the problem of gypsum scaling becomes a trouble for some industry in which use some water for its system. Some disadvanteges come up because of : the time of industrial process will be more longer and production cost increase necesery.To prevent the growth of scale, the experiment must be done. Researcher try to answer this problem so an experimental about kinetic study of gypsum scaling established. Flowrate would be a parameter with assume that it has effect on reaction flow. The result of  this experiment are : reaction rate increase when flow rate increase; adition some aditives becomes reaction rate decrease. Keywords : crystal, flow rate, reactio rate, gipsum

Study of the Wall Slip Effect on Viscous Fluid Micro-Extrusion Process

2015 ◽  
Vol 799-800 ◽  
pp. 774-777
Author(s):  
Cong Ping Chen ◽  
Xiao Yun Wang ◽  
Jie Guang Huang
Keyword(s):  
Viscous Fluid ◽  
Flow Rate ◽  
Rate Increase ◽  
Wall Slip ◽  
Extrusion Process ◽  
Slip Effect ◽  
Fluid Resistance ◽  
Flow Rate Increase ◽  
Computational Fluid Dynamics Cfd ◽  
Fluid Extrusion

In micro-scale flow condition, the flow rate and fluid extrusion expansibility are always affected by the wall slip between the fluid and tube wall. In this research, a wall slip model based on a micro-tube flow was developed, and then the wall slip effect on the viscous fluid micro-extrusion process was explored by computational fluid dynamics (CFD) with different extruding pressures. The results showed that wall slip make the fluid resistance and expansibility decrease, and the fluid mass flow rate increase.

scholarly journals The Effects of Tooth Brushing on Whole Salivary Flow Rate in Older Adults

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
R. H. Affoo ◽  
K. Trottier ◽  
R. Garrick ◽  
T. Mascarenhas ◽  
Y. Jang ◽  
...  
Keyword(s):  
Older Adults ◽  
Flow Rate ◽  
Rate Increase ◽  
Systemic Disease ◽  
Salivary Flow ◽  
Tooth Brushing ◽  
Salivary Flow Rate ◽  
Flow Rates ◽  
Paired Samples ◽  
Flow Rate Increase

Objectives. (1) To determine whether manual (MTB), or electric, tooth brushing (ETB) modulates whole salivary flow rate in older adults who are free of systemic disease. (2) To determine the duration of the brushing-related modulation of salivary flow rate. (3) To compare salivary flow rate modulation associated with MTB and ETB. Method. Twenty-one adults aged 60 years and older participated in two experimental sessions during which they used a manual, or electric, toothbrush to brush their teeth, tongue, and palate. Whole salivary flow rates were determined using the draining method before, during, and after brushing. Differences in salivary flow rates across time periods, and between conditions, were examined using paired samples t-tests applying a Holm-Bonferroni sequential procedure (pcorr<0.0045). The relationship between tooth brushing and age with respect to maximum salivary flow rate increase was examined using Pearson’s correlation coefficient (p<0.05). Results/Conclusion. Whole salivary flow rates increased during, and for up to 5 minutes following, tooth brushing in adults aged 60 years and older who were free of systemic disease. The salivary effects of MTB and ETB were not significantly different. A moderate, positive correlation was observed between tooth-brushing-related maximum salivary flow rate increase and age.

scholarly journals Hydraulic flow rate increase maneuver for ichthyofauna repulsion in bulb-type generating units – Jirau Hydroelectric Power Plant

2021 ◽  
Vol 17 (4) ◽  
Author(s):  
Tania Machado da Silva ◽  
Wllyane Silva Figueiredo ◽  
Luiz Fabrício Zara
Keyword(s):  
Power Plant ◽  
Flow Rate ◽  
Rate Increase ◽  
Draft Tube ◽  
Hydroelectric Power Plant ◽  
Small Fish ◽  
Hydroelectric Power ◽  
Two Stage ◽  
Hydraulic Flow ◽  
Flow Rate Increase

Several repulsion systems have been developed to minimize the confinement of ichthyofauna in draft tubes. In this perspective, this study intends to analyze the efficiency of the hydraulic flow rate increase maneuver, using a hydroacoustic system for real-time monitoring of the movement of the ichthyofauna confined within the draft tube of the generating units of Jirau Hydroelectric Power Plant. It is located on the Madeira River, in Rondônia, Brazil. We analyzed footage of 105 machine shutdowns taken between 2019 and 2020 at Jirau Hydroelectric Power Plant that used the hydraulic flow rate increase maneuver as a strategy to repulse ichthyofauna. Also, the footage of 7 two-stage shutdowns in the year 2020 was analyzed, the first stage without the maneuver and the second with the maneuver. The follow-up of 105 shutdowns demonstrate that approximately 85% of the footage showed little or no movement of ichthyofauna in the draft tube, with images of movements showing patterns characteristic of small fish (~97%). Furthermore, the quantitative evaluation of the two-stage maneuver indicated a reduction of approximately 91% in the movement of ichthyofauna after the hydraulic flow rate increase maneuver. Thus, the increase in the rate of the hydraulic flow procedure, developed by Jirau Energia, proved to be an innovative and efficient strategy in reducing extensive social and environmental impacts and in favoring positive economic impacts.

Selected Properties of Bearings with Helical Groove on the Journal

2011 ◽  
Vol 490 ◽  
pp. 273-281 ◽  
Author(s):  
Jarosław Sep
Keyword(s):  
Flow Rate ◽  
Carrying Capacity ◽  
Rate Increase ◽  
The Other ◽  
Helical Line ◽  
Load Carrying Capacity ◽  
Load Carrying ◽  
Oil Flow ◽  
Helical Groove ◽  
Flow Rate Increase

The paper presents results of tests concerning slide bearing with helical groove on the journal selected properties. It has been stated that during lubrication with contaminated oil helical groove results in wear decrease. On the other hand while lubricating agent was clean oil helical groove results in load carrying capacity decrease and oil flow rate increase. The proposition of non-dimensional index describing the groove and helical line is also presented in the paper. This index is correlated with bearing characteristics and its wear

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