scholarly journals Measuring the impact of channel length on liquid flow through an ideal Plateau border and node system

Soft Matter ◽  
2019 ◽  
Vol 15 (8) ◽  
pp. 1879-1889 ◽  
Author(s):  
Christopher Clarke ◽  
Aris Lazidis ◽  
Fotis Spyropoulos ◽  
Ian T. Norton
Keyword(s):  
Flow Rate ◽  
Liquid Flow ◽  
Channel Length ◽  
Experimental Setup ◽  
Surface Viscosity ◽  
Plateau Border ◽  
System P ◽  
Flow Through ◽  
Rate Controlled ◽  
The Impact

The following work highlights the impact of Plateau border (PB) length, l1, on the apparent surface viscosity, μs, of a flow rate controlled PB and node system using a novel experimental setup.

Liquid flow through aqueous foams: From the plateau border-dominated regime to the node-dominated regime

1999 ◽  
Vol 60 (6) ◽  
pp. R6307-R6308 ◽  
Author(s):  
M. Durand ◽  
G. Martinoty ◽  
D. Langevin
Keyword(s):  
Liquid Flow ◽  
Plateau Border ◽  
Aqueous Foams ◽  
Flow Through

scholarly journals Analysis of the influence of a stator type modification on the performance of a pump with a hole impeller

2019 ◽  
Vol 9 (1) ◽  
pp. 218-228
Author(s):  
Bartłomiej Chomiuk ◽  
Janusz Skrzypacz
Keyword(s):  
Numerical Simulations ◽  
Experimental Research ◽  
Liquid Flow ◽  
Centrifugal Pumps ◽  
Pump Unit ◽  
Manufacturing Costs ◽  
Flow Through ◽  
Low Specific Speed ◽  
Specific Speed ◽  
The Impact

AbstractThe article presents the results of numerical analyses and experimental research of the influence of various types of stators on a liquid flow through a centrifugal pump with a hole impeller. It is a continuation of authors research of cooperation pump stators with alternative types of impellers which work in ultra low specific speed. Hole impellers have become a significant alternative to classical ones in a range of extremely low specific speed nq<10. The aim of the research is to verify the quality as well as quantity of computer modeling results, and to estimate accuracy by examining the impact of a grid and a turbulence model with which the numerical simulations reflect the actual flow.Knowledge concerning construction of hydraulic elements of centrifugal pumps working in the range of parameters corresponding specific speed (nq<10) is insufficient. The outlet elements were tested in various configurations of constructional features. The complexity of the construction of the stator can significantly affect the manufacturing costs of pump unit.

The Impact of Drip Irrigation on Heap Hydrology and Microbial Colonies in Bioleaching

2013 ◽  
Vol 825 ◽  
pp. 455-458
Author(s):  
Marijke A. Fagan ◽  
Emmanuel Ngoma ◽  
Rebecca A. Chiume ◽  
Sanet H. Minnaar ◽  
Andrew J. Sederman ◽  
...  
Keyword(s):  
Flow Rate ◽  
Liquid Flow ◽  
Drip Irrigation ◽  
Preferential Flow ◽  
Leach Solution ◽  
Liquid Content ◽  
Liquid Distribution ◽  
Base Metal Sulfides ◽  
Magnetic Resonance Imaging Mri ◽  
The Impact

In heap bioleaching iron and/or sulfur oxidising microorganisms are used to facilitate the oxidation of base metal sulfides in ore, thereby liberating the metal ions (e.g. Cu2+) into the leach solution. The heap performance is consequently strongly influenced by the contacting of the leach solution and the ore particles. In this study two setups were used to examine irrigation from a single drip emitter, one of the most common methods of heap irrigation. The distribution of liquid, microbial colonisation and mineral recovery in a bioleach of a 132kg “ore slice” of agglomerated ore were monitored using sample ports positioned along the breadth and height of the box over a period in excess of 500 days. A specialist magnetic resonance imaging (MRI) method which is insensitive to the metal content of the ore was subsequently used to examine the effect of flow rate and particle size distribution on the liquid flow into a smaller bed. Overall the lateral movement of the liquid increased with bed depth, though preferential flow was evident. The majority of the liquid flow was in the region directly below the irrigation point and almost no liquid exchange occurred in the areas of lowest liquid content at the top corners of the samples. This had a significant impact on the local leaching efficiencies and microbial colonisation of the ore. The MRI studies revealed at steady state, the majority (~60%) of the liquid flowed into established large channels. There was minimal exchange with low liquid content regions (presumably stagnant liquid) despite their accounting for more than 16% of the total liquid hold-up. The effect of increasing the flow rate was to retard lateral liquid distribution while slightly increasing the liquid hold‑up in large channels in the region below the irrigation point. Hence poor lateral liquid distribution in drip irrigation was identified as a significant disadvantage of the method.

Inactivation of Escherichia coli K-12 in Liquid Egg White By a Flow-through Pulsed Uv Light Treatment System

2020 ◽  
Vol 83 (3) ◽  
pp. 418-425 ◽  
Author(s):  
BEINING OUYANG ◽  
ALI DEMIRCI ◽  
PAUL H. PATTERSON
Keyword(s):  
Escherichia Coli ◽  
Flow Rate ◽  
Uv Light ◽  
Egg White ◽  
Treatment System ◽  
Significant Difference ◽  
Pulsed Uv Light ◽  
Flow Through ◽  
K 12 ◽  
The Impact

ABSTRACT Unpasteurized liquid egg can be contaminated with pathogenic microorganisms and may cause foodborne outbreaks. Thus, it is essential to decontaminate the liquid egg to ensure food safety. Pulsed UV light is one of the emerging technologies for food decontamination in recent years. This static treatment system has been studied previously in our laboratory. However, continuous processing using a flow-through treatment system needs to be evaluated for potential commercial applications. Therefore, in this study, a flow-through treatment system of pulsed UV light was evaluated and optimized for inactivation of Escherichia coli K12NSR for liquid egg white decontamination. Treatment factors including flow rate (40 to 80 mL/min), number of passes (one to three passes), and distance from the sample to the pulsed UV light strobe (5 to 13 cm) were optimized using response surface methodology. This methodology suggested three passes with 40 mL/min flow rate and a 5-cm distance as the optimum conditions. The model was then validated for the maximum reduction of E. coli K12NSR, which was measured as 1.57 log CFU/mL at the optimal conditions. The energy doses of the pulsed UV light and temperature changes of the liquid egg white during the treatment were measured. Furthermore, several quality parameters were assessed at the optimum treatment conditions to determine the impact of the flow-through pulsed UV processing on the quality of liquid egg white. The results showed significant differences in pH, lipid oxidation, turbidity, and color between control and pulsed UV light–treated samples (P &lt; 0.05). However, there was no significant difference in foaming ability or foam stability between pulsed UV light–treated samples and the control. Overall, this study demonstrated the potential of flow-through pulsed UV light to decontaminate liquid egg white, but further research is needed for optimal enhancement. HIGHLIGHTS

Impact Of Transurethral Resection Of Prostate On International Prostate Symptom Score And Peak Urinary Flow Rate

2020 ◽  
Vol 16 (1) ◽  
pp. 11-15
Author(s):  
Md Waliul Islam ◽  
Md Abul Hossain ◽  
Md Nurul Hooda ◽  
Kazi Rafiqul Abedin ◽  
Husne Ara
Keyword(s):  
Flow Rate ◽  
Transurethral Resection ◽  
Urine Volume ◽  
T Test ◽  
Urinary Symptoms ◽  
Urinary Flow Rate ◽  
Transurethral Resection Of Prostate ◽  
Urinary Flow ◽  
Paired Student ◽  
The Impact

Objectives: To evaluate urinary symptoms and quality of life in patient with BPH before and after TURP. To determine the impact of TURP on the urinary symptoms (IPSS) and peak urinary flow rate. Methods: This study is prospective study carried out between 2010 and 2011 in the department of Urology, National Institute of Kidney Diseases & Urology. Total 102 cases were selected purposively according to selection criteria. Each patient was observed and followed up at 8 weeks (1st visit), 16 weeks (2nd visit) 24 weeks (3rd visit) after transurethral resection of prostate (TURP). IPSS score, QOL score also recorded and uroflowmetry was done to see the peak urinary flow rate (Qmax) of urine and voiding time. USG was done to see post voidal residual urine volume and DRE also done in selected cases. Data was complied and statistical analysis were done using computer based software, Statistical Package for Social Science (SPSS), using paired ‘t’ test. A P value <0.05 was taken as significance. Results: Before TURP, IPSS range 17-25 and mean 21.61+2.43, after TURP, range 0-7 and mean 4.27+1.71). Hence a significant improvement of IPSS was found from 2 months to 6 months follow up after TURP. The change was tested using “paired student ‘t’ test”. Before TURP Qmax range 7-12.2 and mean was 9.96+1.69, which became range 18-25 and mean was 22.61+2.28 after TURP and therefore change of mean Qmax was 12.64+2.69. The change was tested using “paired student ‘t’ test”. The change was found significant (P<0.001). Conclusion: Transurethral resection of prostate resolves obstructive symptoms, rapid improvement of urinary flow rate Bangladesh Journal of Urology, Vol. 16, No. 1, Jan 2013 p.11-15

ESTIMATION OF PRESSURE DROP FOR NON-NEWTONIAN LIQUID FLOW THROUGH BENDS USING ADAPTIVE NON-PARAMETRIC MODEL

2020 ◽  
Vol 47 (1) ◽  
pp. 59-69
Author(s):  
Suman Debnath ◽  
Anirban Banik ◽  
Tarun Kanti Bandyopadhyay ◽  
Mrinmoy Majumder ◽  
Apu Kumar Saha
Keyword(s):  
Pressure Drop ◽  
Liquid Flow ◽  
Parametric Model ◽  
Newtonian Liquid ◽  
Flow Through ◽  
Non Parametric

Stabilization of the Speed of the Hydraulic Motor Through Throttle Compensation for Volume Losses

2020 ◽  
Vol 26 (3) ◽  
pp. 126-130
Author(s):  
Krasimir Kalev
Keyword(s):  
Flow Rate ◽  
Hydraulic Drive ◽  
Pressure Change ◽  
Operating Conditions ◽  
Drive System ◽  
Inlet Pressure ◽  
Schematic Diagram ◽  
Hydraulic Characteristics ◽  
Hydraulic Motor ◽  
Flow Through

AbstractA schematic diagram of a hydraulic drive system is provided to stabilize the speed of the working body by compensating for volumetric losses in the hydraulic motor. The diagram shows the inclusion of an originally developed self-adjusting choke whose flow rate in the inlet pressure change range tends to reverse - with increasing pressure the flow through it decreases. Dependent on the hydraulic characteristics of the hydraulic motor and the specific operating conditions.

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