An Evaluation of Energy Definitions for Bursting Pressure Vessel Modeling

2012 ◽  
Author(s):  
Adrian Pierorazio ◽  
Zaki Syed
Keyword(s):  
Real World ◽  
Pressure Vessel ◽  
Bursting Pressure ◽  
Boiling Liquid ◽  
Definition Of ◽  
Real World Problems

The most widely used definition of energy for predicting bursting vessels is Brode energy. There are, however, limitations to the application of this definition to many real-world problems due to the assumptions upon which it is based. This paper presents an evaluation of the applicability of the Brode equation, its common interpretation and limitations, and an evaluation of alternative definitions of energy for bursting vessel and Boiling Liquid Expanding Vapour Explosion (BLEVE) prediction. An illustrative example of the recommended approach is provided.

Towards an Exergy-Based Explosion Energy Model for Boiling-Liquid Expanding-Vapor Explosions

2011 ◽  
Author(s):  
Juan C. Ramirez ◽  
Suzanne A. Smyth ◽  
Russell A. Ogle
Keyword(s):  
Pressure Vessel ◽  
Ambient Pressure ◽  
Maximum Energy ◽  
Explosion Energy ◽  
Superheated Liquid ◽  
Boiling Liquid ◽  
Dead State ◽  
Vapor Explosions ◽  
The Dead ◽  
Definition Of

A boiling liquid, expanding vapor explosion (BLEVE) occurs when a pressure vessel containing a superheated liquid undergoes a catastrophic failure, resulting in a violent vaporization of the liquid. The exposure of a pressure vessel to a fire is a classic scenario that can result in a BLEVE. The thermomechanical exergy of a pressure vessel’s contents provides — by definition — an upper bound on the work that can be performed by the system during the explosion. By fixing the values of ambient pressure and temperature (i.e., the dead state), exergy can be interpreted as another thermodynamic property. This rigorous and unambiguous definition makes it ideal to estimate the maximum energy of explosions. The numerical value of exergy depends on the definition of the dead state. In this paper we examine the effect of different definitions for the dead state on the explosion energy value. We consider two applications of this method: the contribution of the vapor head-space to the explosive energy as a function of the fractional liquid fill of the vessel, and the effect of the vessel burst pressure.

Swarm Intelligence for Electromagnetic Problem Solving

2017 ◽  
pp. 69-100 ◽  
Author(s):  
Luciano Mescia ◽  
Pietro Bia ◽  
Diego Caratelli ◽  
Johan Gielis
Keyword(s):  
Stochastic Process ◽  
Sensitivity Analysis ◽  
Problem Solving ◽  
Swarm Intelligence ◽  
Real World ◽  
Computational Burden ◽  
Electromagnetic Problems ◽  
Definition Of ◽  
Quantum Pso ◽  
Real World Problems

The chapter will describe the potential of the swarm intelligence and in particular quantum PSO-based algorithm, to solve complicated electromagnetic problems. This task is accomplished through addressing the design and analysis challenges of some key real-world problems. A detailed definition of the conventional PSO and its quantum-inspired version are presented and compared in terms of accuracy and computational burden. Some theoretical discussions concerning the convergence issues and a sensitivity analysis on the parameters influencing the stochastic process are reported.

Community-Engaged Research

2018 ◽  
pp. 213-233
Author(s):  
Aaron Samuel Zimmerman
Keyword(s):  
Higher Education ◽  
Real World ◽  
Institutions Of Higher Education ◽  
Research Topics ◽  
Community Engaged Research ◽  
Definition Of ◽  
Real World Problems

Community-engaged research describes an approach towards research and a stance towards scholarship that arose in response to the criticism that institutions of higher education functioned only as ivory towers, disconnected from real-world problems. This chapter is intended to serve as an introduction to the concept of community-engaged research. Topics covered will include the definition of community-engaged research, the criteria for the evaluation of community-engaged research, inherent challenges associated with community-engaged research, and strategies that institutions of higher education can employ as a means of cultivating and sustaining community-engaged research among faculty.

TBLT through the lens of applied linguistics

2016 ◽  
Vol 167 (1) ◽  
pp. 3-15 ◽  
Author(s):  
Martin Bygate
Keyword(s):  
Language Learning ◽  
Real World ◽  
Language Teaching ◽  
Applied Linguistics ◽  
Significant Proportion ◽  
Language Education ◽  
Research To Practice ◽  
Future Directions ◽  
Definition Of ◽  
Real World Problems

Ever since the establishment in the 1940’s of the distinguished journal Language Learning, a significant proportion of research in applied linguistics has defined itself as aiming to address practical problems of language teaching. Given the definition of applied linguistics as ‘the theoretical and empirical study of real world problems in which language has a central role’ (after Brumfit, 2001), an ambition to relate its work to practical language teaching problems is appropriate. Task-based language teaching is a subarea of applied linguistics which deliberately aims to link research to practice. With this in mind, this paper will seek to evaluate the extent to which TBLT research has to date engaged with — and helped address — the real world problems of language education. It then attempts to derive some implications for future directions of TBLT research as a part of an empirical applied linguistics.

scholarly journals Handrails through the Swamp? A Pilot to Test the Integration and Implementation Science Framework in Complex Real-World Research

2021 ◽  
Vol 13 (10) ◽  
pp. 5491
Author(s):  
Melissa Robson-Williams ◽  
Bruce Small ◽  
Roger Robson-Williams ◽  
Nick Kirk
Keyword(s):  
Pilot Study ◽  
Case Studies ◽  
Implementation Science ◽  
Real World ◽  
Environmental Problems ◽  
Environmental Research ◽  
Integrative Framework ◽  
The World ◽  
Science Framework ◽  
Real World Problems

The socio-environmental challenges the world faces are ‘swamps’: situations that are messy, complex, and uncertain. The aim of this paper is to help disciplinary scientists navigate these swamps. To achieve this, the paper evaluates an integrative framework designed for researching complex real-world problems, the Integration and Implementation Science (i2S) framework. As a pilot study, we examine seven inter and transdisciplinary agri-environmental case studies against the concepts presented in the i2S framework, and we hypothesise that considering concepts in the i2S framework during the planning and delivery of agri-environmental research will increase the usefulness of the research for next users. We found that for the types of complex, real-world research done in the case studies, increasing attention to the i2S dimensions correlated with increased usefulness for the end users. We conclude that using the i2S framework could provide handrails for researchers, to help them navigate the swamps when engaging with the complexity of socio-environmental problems.

scholarly journals Combined Games with Randomly Delayed Beginnings

Mathematics ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 534
Author(s):  
F. Thomas Bruss
Keyword(s):  
Discrete Time ◽  
Real World ◽  
Optimal Stopping ◽  
Random Variables ◽  
Approximate Solutions ◽  
Real World Problems

This paper presents two-person games involving optimal stopping. As far as we are aware, the type of problems we study are new. We confine our interest to such games in discrete time. Two players are to chose, with randomised choice-priority, between two games G1 and G2. Each game consists of two parts with well-defined targets. Each part consists of a sequence of random variables which determines when the decisive part of the game will begin. In each game, the horizon is bounded, and if the two parts are not finished within the horizon, the game is lost by definition. Otherwise the decisive part begins, on which each player is entitled to apply their or her strategy to reach the second target. If only one player achieves the two targets, this player is the winner. If both win or both lose, the outcome is seen as “deuce”. We motivate the interest of such problems in the context of real-world problems. A few representative problems are solved in detail. The main objective of this article is to serve as a preliminary manual to guide through possible approaches and to discuss under which circumstances we can obtain solutions, or approximate solutions.

Review of Network Flow Algorithms David P. Williamson

2021 ◽  
Vol 52 (1) ◽  
pp. 12-15
Author(s):  
S.V. Nagaraj
Keyword(s):  
Graduate Students ◽  
Real World ◽  
Network Flow ◽  
Network Flows ◽  
Optimization Problems ◽  
Capacity Constraints ◽  
Incoming Flow ◽  
Network Flow Problems ◽  
Flow Problems ◽  
Real World Problems

This book is on algorithms for network flows. Network flow problems are optimization problems where given a flow network, the aim is to construct a flow that respects the capacity constraints of the edges of the network, so that incoming flow equals the outgoing flow for all vertices of the network except designated vertices known as the source and the sink. Network flow algorithms solve many real-world problems. This book is intended to serve graduate students and as a reference. The book is also available in eBook (ISBN 9781316952894/US$ 32.00), and hardback (ISBN 9781107185890/US$99.99) formats. The book has a companion web site www.networkflowalgs.com where a pre-publication version of the book can be downloaded gratis.

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