Ninth Spiers Memorial Lecture. Some recent experimental studies of diffusion in liquid systems

1957 ◽  
Vol 24 ◽  
pp. 7 ◽  
Author(s):  
Herbert S. Harned
Keyword(s):  
Experimental Studies ◽  
Memorial Lecture ◽  
Liquid Systems

Spiers Memorial Lecture: Introduction to ultrafast spectroscopy and imaging of photochemical reactions

2021 ◽  
Author(s):  
Toshinori Suzuki
Keyword(s):  
Ultrafast Spectroscopy ◽  
Experimental Studies ◽  
Photochemical Reactions ◽  
Memorial Lecture

A brief overview is presented on ultrafast spectroscopy and imaging of photochemical reactions by highlighting several experimental studies reported in the last five years.

Application of Hybrid Biosystems for Stimulation of Oil Production

2021 ◽  
Author(s):  
Baghir Alakbar Suleimanov ◽  
Sabina Jahangir Rzayeva ◽  
Ulviyya Tahir Akhmedova
Keyword(s):  
Oil Recovery ◽  
Single Phase ◽  
Experimental Studies ◽  
Oil Production ◽  
Pore Channel ◽  
Subcritical Region ◽  
Slippage Effect ◽  
Liquid Systems ◽  
Reservoir Conditions

Abstract Microbial enhanced oil recovery is considered to be one of the most promising methods of stimulating formation, contributing to a higher level of oil production from long-term fields. The injection of bioreagents into a reservoir results in the creation of oil-dicing agents along with significant amount of gases, mainly carbon dioxide. In early, the authors failed to study the preparation of self-gasified biosystems and the implementation of the subcritical region (SR) under reservoir conditions. Gasified systems in the subcritical phase have better oil-displacing properties than non-gasified systems. The slippage effect determines the behavior of gas–liquid systems in the SR under reservoir conditions. Slippage occurs more easily when the pore channel has a smaller average radius. Therefore, in a heterogeneous porous medium, the filtration profile of gasified liquids in the SR should be more uniform than for a degassed liquid. The theoretical and practical foundations for the preparation of single-phase self-gasified biosystems and the implementation of the SR under reservoir conditions have been developedSR under reservoir conditions. Based on experimental studies, the superior efficiency of oil displacement by gasified biosystems compared with degassed ones has been demonstrated. The possibility of efficient use of gasified hybrid biopolymer systems has been shown.

2007 George L. Duff Memorial Lecture—The Immune Response in Atherosclerosis

Circulation ◽  
2007 ◽  
Vol 116 (suppl_16) ◽  
Author(s):  
Göran K. Hansson
Keyword(s):  
Innate Immunity ◽  
Vascular Inflammation ◽  
Experimental Studies ◽  
Memorial Lecture ◽  
Immune Reactions ◽  
Specific Antigens ◽  
Atherosclerotic Process ◽  
Molecular Patterns ◽  
Lipoprotein Retention

Immune responses participate in every phase of atherosclerosis. Indeed, atherosclerosis can be viewed as an immune/inflammatory response to lipoprotein retention in the artery wall. There is increasing evidence that both adaptive and innate immunity tightly regulate the atherosclerotic process. Specific antigens and pathogen-like molecular patterns initiate the 2 aspects of immunity by ligating T- and B-cell receptors and pattern recognition receptors, respectively. Effector responses of vascular immune reactions include macrophage activation, cellular immunity, antibody formation, and vascular inflammation. Whereas experimental studies in gene-targeted models have identified major roles for innate immunity and Th1 responses in plaque initiation and progression, clinical, epidemiological and genetic studies suggest that plaque activation, rupture, and atherothrombosis also depend on immune reactions. This lecture will focus on the role of immune mechanisms in the formation and activation of atherosclerotic plaques.

Gas-Newtonian and Gas-Non-Newtonian Slug Flow in Vertical Pipe, Part I: Gas Holdup Characteristics

2010 ◽  
Vol 8 (1) ◽  
Author(s):  
Subrata Kumar Majumder ◽  
Sandip Ghosh ◽  
Arun Kumar Mitra ◽  
Gautam Kundu
Keyword(s):  
Slug Flow ◽  
Oil And Gas ◽  
Experimental Studies ◽  
Industrial Applications ◽  
Transportation Systems ◽  
Gas Holdup ◽  
Newtonian Liquid ◽  
Biochemical Engineering ◽  
Two Phase ◽  
Liquid Systems

Studies on two-phase gas-liquid co-current flow with non-Newtonian liquid system has attracted the attention of researchers over the years due to its wide-spread applications and importance in various different processes in chemical and biochemical industries, such as the process of two-phase in oil and gas wells, transportation systems of crude and refined products, and food processing in biochemical engineering and bio-reactors. This article examines the sole objective of experimental studies on gas holdup in Newtonian and non-Newtonian liquid slug flow within a range of gas and liquid flowrate of 0.5×10-4 to 1.92×10-4 m3/s and 1.6×10-4 to 6.7×10-4 m3/s, respectively. The present data was analyzed with different models. To predict gas holdup, correlations have been developed for individual system with Newtonian and non-Newtonian liquid. A general correlation was also developed to predict the gas holdup combing both the Newtonian and non-Newtonian liquid systems. The study of the gas holdup characteristics in gas-Newtonian and non-Newtonian liquid systems may give insight into a further understanding and modeling of this slug flow characteristics in industrial applications.

scholarly journals A Numerical Analysis Research on Earlier Behavior of Molten Droplet Covered with Vapor Film at the Stage of Triggering and Propagation in Steam Explosion

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Mingjun Zhong ◽  
Yankai Li ◽  
Meng Lin ◽  
Minghao Yuan ◽  
Yanhua Yang
Keyword(s):  
Pressure Pulse ◽  
Experimental Studies ◽  
Hydrodynamic Effect ◽  
Vapor Film ◽  
Droplet Deformation ◽  
Molten Droplet ◽  
Material Density ◽  
Liquid Systems ◽  
Droplet Behavior ◽  
Very High

When the molten fuel with high temperature falls into the cavity water, it will be dispersed into droplets which are covered with vapor films due to the rapid heat transfer with phase transition. This situation cannot be simply described by liquid-liquid or gas-liquid systems. And there are no sufficient experimental studies on the behavior of droplet covered with vapor film because of the rapid reaction and the difficulty in capture of the film configuration. In this paper, a multiphase code with the volume of fluid (VOF) method is used to simulate the earlier behavior of droplet when vapor film exits. The earlier behavior is defined as behavior of the droplet before its disintegration. Thermal effect and pure hydrodynamic effect are, respectively, considered. The simulation results indicate that the film thickness and material density have significant effect on the earlier behavior of droplet. The situation assumed in Ciccarelli and Frost’s model (1994) is observed in current simulation of earlier thermal droplet behavior. The effect of triggering pressure pulse on earlier hydrodynamic behavior is also discussed and it indicates that vapor film has little effect on the hydrodynamic droplet deformation when the intensity of the pressure pulse is very high.

Numerical Simulation of Thermal Behavior of a Molten Droplet Covered With Vapor Film

2014 ◽  
Author(s):  
Mingjun Zhong ◽  
Meng Lin ◽  
Jinbiao Xiong ◽  
Yankai Li ◽  
Yanhua Yang
Keyword(s):  
Experimental Studies ◽  
Vapor Film ◽  
Volume Of Fluid Method ◽  
Molten Droplet ◽  
Material Density ◽  
Phase Code ◽  
Liquid Systems ◽  
Droplet Behavior ◽  
Simulation Results ◽  
Multi Phase

When the molten fuel with high temperature falls into the cavity water, it will be dispersed to droplets which are covered with vapor films due to the rapid heat transfer with phase transition. This situation cannot be simply described by liquid-liquid nor gas-liquid systems. And there are not sufficient experimental studies on the behavior of droplet covered with vapor film because of the rapid reaction and the difficulty in capture of the film configuration. In this paper, A multi-phase code with the Volume of Fluid Method (VOF) is developed to simulate the behavior of droplet covered with vapor film. Thermal effect is considered. The simulation results indicate that the film thickness and material density have significant effect on the behavior of droplet. The situation assumed in Ciccarelli and Frost’s model is observed in current simulation of thermal droplet behavior.

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