scholarly journals Overview of two deterministic modelings for prompt emission in fission

2021 ◽  
Vol 256 ◽  
pp. 00017
Author(s):  
Anabella Tudora
Keyword(s):  
Experimental Data ◽  
Kinetic Energy ◽  
Excitation Energy ◽  
The Other ◽  
New Method ◽  
Total Kinetic Energy ◽  
Γ Ray ◽  
Total Excitation Energy ◽  
The University ◽  
Prompt Emission

Two models with a deterministic treatment of prompt emission in fission were developed at the University of Bucharest. Both models work with the same ranges of initial fragments and total kinetic energy and they use the same partition of the total excitation energy at full acceleration based on modelling at scission. The main difference between these modelings regards the prompt emission treatment itself. I.e. the Point-by-Point (PbP) model uses a global treatment of sequential emission while the other modeling is based on an event-by-event treatment of sequential emission. Both models are submitted to a rigorous validation. This paper focuses on model results of different prompt γ-ray quantities, which describe very well the existing experimental data. A new method to calculate prompt γ-ray spectra, including a global treatment based on the distribution of prompt γ-ray energy per quanta, is proposed.

scholarly journals Study of High-Energy Fission in Inverse Kinematics

2019 ◽  
Vol 223 ◽  
pp. 01037
Author(s):  
G. Mantovani ◽  
D. Ramos ◽  
M. Caamaño ◽  
A. Lemasson ◽  
M. Rejmund ◽  
...  
Keyword(s):  
Kinetic Energy ◽  
Excitation Energy ◽  
Shell Structure ◽  
Inverse Kinematics ◽  
High Energy ◽  
Total Kinetic Energy ◽  
High Excitation Energy ◽  
High Excitation ◽  
Shell Effects

Fission at low excitation energy, is a process in which both macroscopic and microscopic aspects are involved. Some features in the total kinetic energy and in the N/Z distributions of the fragments, commonly associated with shell effects, came out in a series of recent experiments with high excitation energy fusionfission reactions in inverse kinematics. In the latest experiment of this campaign, a study of high-energy fission and quasi-fission between a 238U beam and a series of light targets was carried out by using the aforementioned technique, in order to probe the role of the shell structure in these processes.

scholarly journals The Computation of Adjacent Blade-Row Effects in a 1.5 Stage Axial Flow Turbine

1997 ◽  
Author(s):  
Rolf Emunds ◽  
Ian K. Jennions ◽  
Dieter Bohn ◽  
Jochen Gier
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Boundary Conditions ◽  
Axial Flow ◽  
The Other ◽  
Navier Stokes ◽  
Blade Row ◽  
Flow Through ◽  
The University

This paper deals with the numerical simulation of flow through a 1.5 stage axial flow turbine. The 3-row configuration has been experimentally investigated at the University of Aachen where measurements behind the first vane, the first stage and the full configuration were taken. These measurements allow single blade row computations, to the measured boundary conditions taken from complete engine experiments, or full multistage simulations. The results are openly available inside the framework of ERCOFTAC 1996. There are two separate but interrelated parts to the paper. Firstly, two significantly different Navier-Stokes codes are used to predict the flow around the first vane and the first rotor, both running in isolation. This is used to engender confidence in the code that is subsequently used to model the multiple bladerow tests, the other code is currently only suitable for a single blade row. Secondly, the 1.5 stage results are compared to the experimental data and promote discussion of surrounding blade row effects on multistage solutions.

The New Method to Separate Stannum and Copper in the Process of Refining Tin

2020 ◽  
Vol 996 ◽  
pp. 157-164
Author(s):  
Bo Zhang ◽  
Da Chun Liu ◽  
Heng Xiong ◽  
Zhen Gen Zhou ◽  
Xu Li ◽  
...  
Keyword(s):  
Experimental Data ◽  
Experimental Study ◽  
Reaction Temperature ◽  
Removal Rate ◽  
Human Life ◽  
The Other ◽  
New Method ◽  
Promising Technology ◽  
Temperature Time ◽  
Sulfiding Agent

As the ancient metal, Sn is widely used in all aspects of human life. Nowadays, S, as the vulcanizing agent, is used in the process of refining tin to separate Cu and Sn. However, there are few reports about the other agent of removing copper from stannum. In this study, SnS, a new sulfiding agent to separate Cu and Sn, was investigated. During the process, SnS replaces the combination of Sn and Cu. The variables considered in the experimental study were reaction temperature, time and the ratio of reactants. The experimental data indicated under certain conditions, the removal rate of Cu reach 94.3%. At last, we studied the vacuum reaction of Cu2S and Sn, results indicated that under appropriate conditions, the Cu is detected. The SnS is formed. And after the vacuum reaction, the SnS could be used recycling. This work presented a promising technology for separating Cu from tin.

scholarly journals Excitation energy dependence of the total kinetic energy release in 235U (n , f)

2014 ◽  
Vol 89 (5) ◽  
Author(s):  
R. Yanez ◽  
L. Yao ◽  
J. King ◽  
W. Loveland ◽  
F. Tovesson ◽  
...  
Keyword(s):  
Kinetic Energy ◽  
Excitation Energy ◽  
Energy Release ◽  
Energy Dependence ◽  
Kinetic Energy Release ◽  
Total Kinetic Energy

Numerical Computation of Flow in Rotating Ducts

1977 ◽  
Vol 99 (1) ◽  
pp. 148-153 ◽  
Author(s):  
A. K. Majumdar ◽  
V. S. Pratap ◽  
D. B. Spalding
Keyword(s):  
Experimental Data ◽  
Kinetic Energy ◽  
Finite Difference ◽  
Numerical Computation ◽  
Cross Section ◽  
Dissipation Rate ◽  
Rectangular Cross Section ◽  
Longitudinal Direction ◽  
The Other ◽  
Constant Area

A finite-difference procedure is employed to predict the turbulent flow in ducts of rectangular cross-section, rotating about an axis normal to the longitudinal direction. The flows were treated as “parabolic” and the turbulence model used involved the solution of two differential equations, one for the kinetic energy of the turbulence and the other for its dissipation rate. Agreement with experimental data is good for a constant-area duct at low rotation, but less satisfactory for a divergent duct at larger rotation. It is argued that a “partially-parabolic” procedure will be needed to predict the latter flow correctly.

scholarly journals THE BEHAVIOR OF PEOPLE ON YOUTUBE BASED ON EXPERIMENTAL DATA

2021 ◽  
Vol 5 (10) ◽  
Author(s):  
Olipriya Chakraborty
Keyword(s):  
Experimental Data ◽  
Social Media ◽  
The Other ◽  
New Method ◽  
Social Media Platform ◽  
Other Hand ◽  
The Social ◽  
Media Platform ◽  
Educational Videos

The 7-day experiment was conducted to find out the behavior of people on the social media platform of YouTube. It addressed whether people spend most of their time on YouTube watching education-based videos or entertainment-based videos. It was an experiment using a new method to take a fresh look at existing ideas. The research was conducted to find out the productivity of people on YouTube. Two YouTube channels were formed and a video posted every day and their views, as well as the new number of subscribers, were recorded every 24 hours. One of the channels was education-based while the other was entertainment-based. Finally, it was found out that the education-based channel had gained 4 new subscribers and the total number of views was 32. The entertainment-based channel, on the other hand, had gained 16 subscribers. The total number of views was 237. Thus, it can be effectively concluded that people tend to spend their time watching entertaining videos as opposed to educational videos on YouTube. It means they tend to spend their time less productively.

Numerical Computations of the Flow in Curved Ducts

1975 ◽  
Vol 26 (3) ◽  
pp. 219-228 ◽  
Author(s):  
V S Pratap ◽  
D B Spalding
Keyword(s):  
Experimental Data ◽  
Kinetic Energy ◽  
Differential Equations ◽  
Dissipation Rate ◽  
Numerical Scheme ◽  
Pressure Field ◽  
The Other ◽  
Curved Duct ◽  
Flow Situation ◽  
Curved Ducts

SummaryThe paper describes the application of a recently developed numerical scheme to the computation of the flow in a curved duct. The flow situation is partially-parabolic in nature as there are significant elliptic effects, which are transmitted through the pressure field. The turbulence model used comprises two differential equations, one for the kinetic energy of turbulence and the other for its dissipation rate. It has been observed that the predictions using the new procedure agree very satisfactorily with the experimental data. Comparisons are also made with the predictions of a fully-parabolic calculation procedure.

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