A132 Measurement of liquid phase temperature field around a boiling bubble using laser interferometry

2014 ◽  
Vol 2014 (0) ◽  
pp. _A132-1_-_A132-2_
Author(s):  
Kazuhito Dejima ◽  
Tomohide Yabuki ◽  
Takuya Hamaguchi ◽  
Osamu Nakabeppu
Author(s):  
Y.V. Kornienko ◽  
P.M. Magaziy ◽  
K.O. Gatilov ◽  
R.V. Sachok

The temperature field of firm crystal-amorphous structures receiption from liquid systems in the fluid bed is explored. The stable conducting terms of process are certain. Previous studies have shown that increasing the irrigation density increases the probability of formation of agglomerates, which causes a decrease in temperature; therefore, it is advisable to measure the temperature field in the environment of the dispersant and compare it with the values of temperatures at the characteristic point, according to which the regulation of the flow of liquid phase to the granulator is carried out. The objective of the experimental research was to determine the change of the temperature field in disperse systems in obtaining crystalline-amorphous solid structures in a fluidized-bed apparatus. In case of an increase in the amount of heat flow, an adequate increase in the flow of liquid phase occurs. This results in the local overturning of solid particles and, as a result, the formation of large aggregates and loss of quality of fluidization. To eliminate this disadvantage it is advisable to create conditions for uneven distribution of the coolant speed. In the downstream right and left fluxes, the coolant speed should not exceed the rate of gas filtration through the material. In the left upward flow, in which the direction of motion of the granular material is opposite to the direction of the vector of the linear velocity of the dispersed droplets of the liquid phase, it is expedient to increase the flow of the coolant in a direction that coincides with the downstream flow. To verify these provisions, it is expedient to conduct a study of the continuous process of formation of solid multilayer composites.


1995 ◽  
Author(s):  
Takuo Yoshizaki ◽  
Takeshi Funahashi ◽  
Keiya Nishida ◽  
Hiroyuki Hiroyasu

2020 ◽  
Vol 61 (3) ◽  
Author(s):  
Markus Michael Prenting ◽  
Muhammad Imran Bin Dzulfida ◽  
Thomas Dreier ◽  
Christof Schulz

2001 ◽  
Author(s):  
D. Naylor

Abstract Laser interferometry can be used to measure the average temperature field in a fluid, integrated over the length of an experimental model. However, such measurements are inherently approximate when there is a temperature variation in the direction of the test/object beam. The present study examines the accuracy of beam-averaged interferometric measurements made in ideal gases. An analysis is performed to determine the accuracy of both beam-averaged temperature and heat transfer rate measurements. The heat transfer results are obtained for simulated measurements of forced convection from a plate with a power function temperature variation in the beam direction. The results show that the error in the beam-averaged temperature field is less small, even for the most adverse temperature distribution in the light beam direction. However, it was found that the error in the beam-averaged heat transfer rate can be greater than ten percent for some conditions.


Author(s):  
Daping Lin ◽  
Tao Zhou ◽  
Xu Yang ◽  
Xiaolu Fang

This paper presents a CFD study of the flow and deposition of particles in vapor in a 1000mm by 20mm narrow rectangular channel. The temperature of the wall is set below the condensation point, so the vapor will change into the liquid phase near the wall. The flow and deposition of the particles in the condition when the phase transition of water occurs is simulated by ANSYS Fluent code. The result shows that the condensation of the water vapor will change the temperature field and the velocity of the flow in the channel. The particles will be forced to the wall due to the thermophoretic force. The condensation developing process will enhance the deposition of the particles while the developed liquid layer will stop the particles flow to the wall.


2014 ◽  
Vol 22 (7) ◽  
pp. 7962 ◽  
Author(s):  
Robert Fabian Hankel ◽  
Astrid Günther ◽  
Karl-Ernst Wirth ◽  
Alfred Leipertz ◽  
Andreas Braeuer

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