Experimental investigation of the thermal fluctuations in hot and cold fluids mixing in a T-junction filled with spherical particles

2014 ◽  
Vol 71 (1) ◽  
pp. 310-316 ◽  
Author(s):  
Yongwei Wang ◽  
Ping Wang ◽  
Tao Lu
Keyword(s):  
Experimental Investigation ◽  
Thermal Fluctuations ◽  
Spherical Particles

The behaviors of particle-wall collision for non-spherical particles: Experimental investigation

2020 ◽  
Vol 363 ◽  
pp. 187-194 ◽  
Author(s):  
Jingyu Wang ◽  
Man Zhang ◽  
Lele Feng ◽  
Hairui Yang ◽  
Yuxin Wu ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Spherical Particles ◽  
Wall Collision

Thermal Contact Conductance of Packed Beds in Contact With a Flat Surface

1988 ◽  
Vol 110 (1) ◽  
pp. 38-41 ◽  
Author(s):  
G. P. Peterson ◽  
L. S. Fletcher
Keyword(s):  
Experimental Investigation ◽  
Stainless Steel ◽  
Thermal Contact ◽  
Spherical Particles ◽  
Thermal Contact Conductance ◽  
Packed Beds ◽  
Contact Conductance ◽  
Analytical Expression ◽  
Flat Surfaces ◽  
Stainless Steel 304

An experimental investigation was conducted to determine the thermal contact conductance of packed beds of spherical particles in contact with flat surfaces. Beds comprised of four materials, Aluminum 2017-T4, Yellow Brass, Stainless Steel 304, and Chromium Alloy AISI 52100, all in contact with flat Stainless Steel 304, surfaces were evaluated in a vacuum environment, at a mean interface temperature of 66°C. In addition to the experimental program, an analytical expression was developed by combining previous work performed by other investigators. The results of the experimental investigation are compared with the analytical expression and indicate that an accurate method of predicting the thermal contact conductance at the interface between beds of spherical particles and nominally flat surfaces has been identified.

Numerical and experimental investigation of the pressure drop in packings of spherical and non-spherical particles

2015 ◽  
Author(s):  
Kevin Vollmari ◽  
Muhammad S. Khan ◽  
Tobias Oschmann ◽  
Harald Kruggel-Emden
Keyword(s):  
Experimental Investigation ◽  
Pressure Drop ◽  
Spherical Particles

scholarly journals Experimental investigation of heat transfer in three phase fluidized bed cooling column

2015 ◽  
Vol 21 (4) ◽  
pp. 519-526
Author(s):  
Zorana Arsenijevic ◽  
Tatjana Kaludjerovic-Radoicic ◽  
Mihal Djuris ◽  
Zeljko Grbavcic
Keyword(s):  
Heat Transfer ◽  
Experimental Investigation ◽  
Fluidized Bed ◽  
Cooling Water ◽  
Spherical Particles ◽  
Percentage Error ◽  
Hot Air ◽  
Air Temperatures ◽  
Three Phase ◽  
Fluidized System

In this study, a three-phase (gas-liquid-solid) fluidized bed was used to study the heat transfer characteristics of the system. The system consisted of low density (290 kg/m3) spherical particles of the diameter of 2 cm in 0.25 m cylindrical column with the countercurrent flow of water and air. The experimental investigation and mathematical modeling of heat transfer between the hot air and the cooling water was carried out. The experiments were conducted for the variety of different fluid flow rates and inlet air temperatures, while the air flow rate was kept constant. Based on the obtained experimental results a new correlation for heat transfer in three-phase fluidized system was proposed. The mean percentage error between the experimental and the correlated values of the jHp obtained was 1.69%. The hydrodynamic parameters of the system were also calculated according to the available literature correlations.

STEM Study of Surface Plasmon Excitation in Small Spherical Particles

1990 ◽  
Vol 48 (2) ◽  
pp. 42-43
Author(s):  
Daniel UGARTE
Keyword(s):  
Energy Loss ◽  
Spherical Particles ◽  
Small Particles ◽  
Bulk Materials ◽  
Low Loss ◽  
Plasmon Excitation ◽  
Surface Modes ◽  
Surface Plasmon Excitation ◽  
Analytical Electron ◽  
Analytical Electron Microscope

Small particles exhibit chemical and physical behaviors substantially different from bulk materials. This is due to the fact that boundary conditions can induce specific constraints on the observed properties. As an example, energy loss experiments carried out in an analytical electron microscope, constitute a powerful technique to investigate the excitation of collective surface modes (plasmons), which are modified in a limited size medium. In this work a STEM VG HB501 has been used to study the low energy loss spectrum (1-40 eV) of silicon spherical particles [1], and the spatial localization of the different modes has been analyzed through digitally acquired energy filtered images. This material and its oxides have been extensively studied and are very well characterized, because of their applications in microelectronics. These particles are thus ideal objects to test the validity of theories developed up to now.Typical EELS spectra in the low loss region are shown in fig. 2 and energy filtered images for the main spectral features in fig. 3.

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