scholarly journals Micro-structure of growth solid-liquid boundary layer of KTa1-xNbxO3 crystal

2010 ◽  
Vol 59 (7) ◽  
pp. 5085
Author(s):  
Zhang Qing-Li ◽  
Yin Shao-Tang ◽  
You Jing-Lin ◽  
Wang Yuan-Yuan ◽  
Zhou Wen-Ping ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Micro Structure ◽  
Liquid Boundary ◽  
Solid Liquid ◽  
Liquid Boundary Layer

Raman Spectrum Analysis on the Solid–Liquid Boundary Layer of BGO Crystal Growth

2007 ◽  
Vol 24 (7) ◽  
pp. 1898-1900 ◽  
Author(s):  
Zhang Xia ◽  
Yin Shao-Tang ◽  
Wan Song-Ming ◽  
You Jing-Lin ◽  
Chen Hui ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Raman Spectrum ◽  
Crystal Growth ◽  
Spectrum Analysis ◽  
Liquid Boundary ◽  
Solid Liquid ◽  
Liquid Boundary Layer

Visualization of Microbubble Distribution Inside Turbulent Boundary Layer Along Flat and Curved Solid Surfaces

2019 ◽  
Author(s):  
Yuichi Murai ◽  
Daichi Saito ◽  
Daiki Ushiyama ◽  
Hyun Jin Park ◽  
Yuji Tasaka
Keyword(s):  
Boundary Layer ◽  
Solid Wall ◽  
Three Dimensional ◽  
Elliptic Cylinder ◽  
Water Electrolysis ◽  
Solid Surfaces ◽  
Curvature Radius ◽  
Liquid Boundary ◽  
Dimensional Distribution ◽  
Liquid Boundary Layer

Abstract How microbubbles behave inside turbulent boundary layers are investigated experimentally. Water electrolysis is applied for generation of microbubbles in water, of which electrodes are flash mounted on the solid wall in the upstream section of the measurement area. Four kinds of solid surfaces are examined to compare the microbubble distribution. For a circular cylinder of the radius R = 22 mm at Re = 5,000, we found that microbubbles depart from the surface earlier than the liquid boundary layer. For an elliptic cylinder of the curvature radius of R = 60 mm and a hydrofoil of NACA0040, microbubble injection made the separation point move downstream in the range of 9,000 < Re < 90,000. To compare the effect with the cases of flat solid surfaces (R = infinity), we visualized three-dimensional distribution of microbubbles with color-coded volumetric illumination technique. The result has shown formation of microbubble clusters intermittently, which has Coulomb potential due to negative electric charge on bubble interfaces.

scholarly journals Diffusive steel scrap melting in carbon-saturated hot metal—phenomenological investigation at the solid–liquid interface

Materials ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1358 ◽  
Author(s):  
Penz ◽  
Schenk ◽  
Ammer ◽  
Klösch ◽  
Pastucha ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Carbon Concentration ◽  
Steel Production ◽  
Production Optimization ◽  
Steel Scrap ◽  
Process Conditions ◽  
Hot Metal ◽  
Scrap Melting ◽  
Solid Liquid Interface ◽  
Solid Liquid

The oxygen steelmaking process in a Linz-Donawitz (LD) converter is responsible for more than 70% of annual crude steel production. Optimization of the process control and numerical simulation of the LD converter are some of the current challenges in ferrous metallurgical research. Because of the process conditions and oxidation of impurities of the hot metal, a lot of chemical heat is generated. Therefore, steel scrap is charged as a coolant with the economical side aspect of its recycling. One of the more complex aspects is, among others, the dissolution and melting behaviour of the scrap in carbon-saturated hot metal. Heat and mass transfer act simultaneously, which has already been investigated by several researchers using different experimental approaches. The appearances at the interface between solid steel and liquid hot metal during diffusive scrap melting have been described theoretically but never investigated in detail. After an experimental investigation under natural and forced convective conditions, the samples were further investigated with optical microscopy and electron probe microanalysis (EPMA). A steep carbon concentration gradient in the liquid appeared, which started at an interface carbon concentration equal to the concentration on the solid side of the interface. Moreover, the boundary layer thickness moved towards zero, which symbolized that the boundary layer theory based on thermodynamic equilibrium was not valid. This fact was concluded through the prevailing dynamic conditions formed by natural and forced convection.

scholarly journals Sliding fluids: Dewetting experiments reveal the solid/liquid boundary condition

2010 ◽  
Vol 216 ◽  
pp. 012002 ◽  
Author(s):  
Oliver Bäumchen ◽  
Matthias Lessel ◽  
Renate Fetzer ◽  
Ralf Seemann ◽  
Karin Jacobs
Keyword(s):  
Boundary Condition ◽  
Liquid Boundary ◽  
Solid Liquid
Sign in / Sign up

Export Citation Format

Share Document