Experimental study of the thermo-physical parameters of a free elementary convective cell

2016 ◽  
Vol 19 (4) ◽  
pp. 25-35
Author(s):  
L. Bozbey ◽  
◽  
A. Kostikov ◽  
N. Kurskaya ◽  
V. Tkachenko ◽  
...  
Keyword(s):  
Experimental Study ◽  
Convective Cell ◽  
Physical Parameters

Experimental Study of Low Concentration Sand Transport in Multiphase Air–Water Horizontal Pipelines

2015 ◽  
Vol 137 (3) ◽  
Author(s):  
Kamyar Najmi ◽  
Alan L. Hill ◽  
Brenton S. McLaury ◽  
Siamack A. Shirazi ◽  
Selen Cremaschi
Keyword(s):  
Experimental Study ◽  
Gas Flow ◽  
Intermittent Flow ◽  
Sand Transport ◽  
Physical Parameters ◽  
Internal Diameter ◽  
Flow Rates ◽  
Minimum Flow ◽  
Wide Range ◽  
Sand Size

The ultimate goal of this work is to determine the minimum flow rates necessary for effective transport of sand in a pipeline carrying multiphase flow. In order to achieve this goal, an experimental study is performed in a horizontal pipeline using water and air as carrier fluids. In this study, successful transport of sand is defined as the minimum flow rates of water and air at which all sand grains continue to move along in the pipe. The obtained data cover a wide range of liquid and gas flow rates including stratified and intermittent flow regimes. The effect of physical parameters such as sand size, sand shape, and sand concentration is experimentally investigated in 0.05 and 0.1 m internal diameter pipes. The comparisons of the obtained data with previous studies show good agreement. It is concluded that the minimum flow rates required to continuously move the sand increases with increasing sand size in the range examined and particle shape does not significantly affect sand transport. Additionally, the data show the minimum required flow rates increase by increasing sand concentration for the low concentrations considered, and this effect should be taken into account in the modeling of multiphase sand transport.

scholarly journals The importance of physical parameters for the penetration depth of impregnation products into cementitious materials: Modelling and experimental study

2020 ◽  
Vol 257 ◽  
pp. 119595
Author(s):  
Janez Perko ◽  
Rafael Zarzuela ◽  
Inés Garcia-Lodeiro ◽  
María Teresa Blanco-Varela ◽  
Maria J. Mosquera ◽  
...  
Keyword(s):  
Experimental Study ◽  
Penetration Depth ◽  
Cementitious Materials ◽  
Physical Parameters ◽  
Materials Modelling

Experimental study of physical parameters of semiconductor lasers

1997 ◽  
Author(s):  
Gleb E. Shtengel ◽  
Paul A. Morton ◽  
Rudolf F. Kazarinov ◽  
David A. Ackerman ◽  
Mark S. Hybertsen ◽  
...  
Keyword(s):  
Experimental Study ◽  
Semiconductor Lasers ◽  
Physical Parameters

scholarly journals Experimantal researches of the achievements of a current burdening course plates

2019 ◽  
Vol 1 (52) ◽  
pp. 82-90
Author(s):  
Іvan Tegza
Keyword(s):  
Experimental Study ◽  
Bearing Capacity ◽  
Experimental Research ◽  
Strain State ◽  
Vertical Plane ◽  
Physical Parameters ◽  
Auxiliary Equipment ◽  
Stress Strain ◽  
Test Plate ◽  
A Current

The article presents the results of the experimental study of the peculiarities of the work under the calculation load of planarsuperstructural plates of the developed system of non-beating overlap. Great attention is paid to the construction of bearingstructures prototype. The design of auxiliary equipment is described, which enabled to test the investigating U-block in conditionsthat imitate real resistance. The method of performing experimental research with indication of methods and means ofmeasuring geometrical and physical parameters that characterize the stress-strain state and bearing capacity of the test plate isgiven. The conducted investigations enabled to determine the nature of deformation and destruction of the superstructureslabs as a separate element in the developed system of non-beating ceiling. Attention is drawn to the fact that the achievementof the bearing capacity is not accompanied by the process of destruction, but is characterized by significant movementsof the supporting plots in the vertical plane

Experimental Study of Fluid Phase Equilibrium Along Thermodynamically Optimized Interface of a Stored Liquid Container

2016 ◽  
Vol 8 (4) ◽  
Author(s):  
Dibakar Rakshit ◽  
Ramesh Narayanaswamy ◽  
K. P. Thiagarajan
Keyword(s):  
Mass Transfer ◽  
Experimental Study ◽  
Fluid Phase ◽  
Physical Parameters ◽  
Gaseous State ◽  
Storage Container ◽  
Thermal Optimization ◽  
Interfacial Mass Transfer ◽  
The Individual ◽  
Liquid Vapor

This experimental study presents the thermal optimization of a storage container partially filled with liquid (water) with an ullage region above the liquid composed of water vapor and air. The basic purpose of this thermal optimization was to qualitatively explore the design conditions that minimize the heat leaks from the storage tank to the external environment at a lower temperature than the liquid in the storage container. Two symbiotic physical parameters—interfacial mass transfer and the entropy generated by the system—influence the thermal performance of the storage container. These two symbiotic physical parameters were simultaneously considered when optimizing the system. The mass transfer estimation involved the determination of (i) the liquid–vapor interfacial temperature, (ii) the fractional concentration of the evaporating liquid present in the gaseous state, and (iii) the surface area of the liquid–vapor interface. The entropy of the system was estimated separately by considering the entropy of the diabatic saturated liquid and the ullage vapor. A synergistic objective function was subsequently composed based on the penalty involved in deviation from the individual optima, thus determining a holistic optimum. The results show that stored liquids exhibit better second-law efficiency in open containers than in containers that are closed by a lid. The primary factor that influences this optimum is the lid condensation that occurs in closed containers at the 50% filling level.

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