Computing and Systems Engineering

Advances in Mathematical Programming Models for Enterprise-wide Optimization

CAST Division

Apr 26, 2012

Ignacio Grossmann

Enterprise-wide optimization (EWO) has become a major goal in the process industries due to the increasing pressures for remaining competitive in the global marketplace.

Evaluation of Key Parameters for Designing Effective Water Curtain Systems for LNG Facilities Using Computational Fluid Dynamics

Apr 5, 2012

Byung Kyu Kim, Byung Kyu Kim

Concerns over public safety and security of an accidental LNG spill have motivated the continued study of LNG mitigation measures. Forced dispersion of LNG vapors using a water curtain system has been proven to be effective in reducing the LNG vapor exclusion zone by enhancing the dispersion...

Modeling of LNG Spills Into Trenches and Troughs

Apr 5, 2012

Nicolas F. Ponchaut

Trenches and troughs are commonly used in LNG storage and transfer facilities to contain potential LNG spills. The trenches are concrete-lined rectangular channels dug into the ground. They are typically slightly inclined from the horizontal to direct the flow of LNG towards the sump and they are...

Source Term Modeling of Vapor Cloud Formation During a Cryogenic Liquid Spill Based on a Boiling Model by CFD Method

Apr 4, 2012

Yi Liu

The formation of a flammable vapor cloud following a spill of cryogenic liquids, such as ammonia and LNG (liquefied natural gas), on a ground or water includes significant toxic, fire or explosion hazards. The ability to predict the consequences of such an event is crucial to perform proper risk...

Theoretical Study of Expansion Foam Application on LNG Pool Using Computational Fluid Dynamics

Apr 4, 2012

Bin Zhang

LNG facilities could harm the personnel on site and jeopardize local communities nearby, due to the flammability and dense gas behaviors of LNG. Nowadays, the growing concern with chemical process safety leads to the timely establishment of regulations and standards regarding to consequence...

Computational Modeling and On-Sun Model Validation for a Multiple Tube Solar Reactor with Reflective Cavity Walls

Oct 17, 2011

Janna Martinek

A three-dimensional steady state computational fluid dynamics model is developed for a solar receiver consisting of a reflective cavity with a windowed aperture enclosing an array of five tubes. The computational model couples radiative transfer with fluid flow, heat transfer, mass transfer, and...

Simulation Study of Different Alternatives for Isoamyl Butyrate Production by Using Aspen Plus®

Oct 17, 2011

Jairo A. Duran

Simulation Study of Different Alternatives for Isoamyl Butyrate Production by Using Aspen Plus ® Jairo Duran, Karen Cañón, Iván Gil, Gerardo Rodríguez, Julio Vargas Grupo de Procesos Químicos y Bioquímicos. Department of Chemical and Environmental Engineering. Universidad Nacional de Colombia...

Simulation and Economics of Biodiesel Production From Microbial Lipids

Oct 17, 2011

Ramalingam Subramaniam

In this work, production of lipid from Lypomyces starkeyi on soluble sweet potato starch was simulated in Aspen Plus simulation. A kinetic model based on experimental results of medium optimization and high density cultivation was used for cell growth and lipid production. The simulation...

A Numerical Study On Bio-Oil Gasification Using A Multicomponent Approach

Oct 17, 2011

Song-Charng Kong

A Numerical Study on Bio-Oil Gasification Using A Multicomponent Approach Bio-oil, also called pyrolysis oil, is a complex biorenewable fuel produced from fast pyrolysis of biomass. Since bio-oil is carbon dioxide neutral, it can be an ideal replacement for petroleum fuel to be used in many kinds...

Mechanistic Modeling of Fast Pyrolysis of Cellulose to Predict Bio-Oil Composition

Oct 16, 2011

Vinu Ravikrishnan

Fast pyrolysis, a potential strategy for the production of transportation fuels from biomass, involves a complex network of competing reactions, which result in the formation of bio-oil, non-condensable gaseous species, and solid char. Bio-oil is a mixture of anhydro sugars, furan derivatives, and...

Flare Minimization Via Dynamic Simulation

Mar 15, 2011

Kuyen Li

Flaring in chemical process industry (CPI) is an important method to protect equipment and personnel safety during the process upset and the chemical plant turnaround. However, excessive flaring emits lots of carbon dioxide as well as air pollutants, which cause negative environmental and social...

Teach Yourself the Basics of Aspen Plus

January, 2011

Aspen Plus is on of the most popular process simulation software programs used industrially and academically. Though the software is available at many corporations and universities, there are no textbooks which are dedicated to teaching the step-by-step use of the software. This book is designed to...

Federal Agency View of Simulation Based Engineering and Science

Nov 8, 2010

Clark Cooper, Phillip Westmoreland

US government agencies recognize that predictive simulation has become increasingly powerful for advancing scientific and technological goals of society. A key reason is high-performance computing that allows more complete treatment of physics and uncertainty. There is great optimism about the...

Smart Process Manufacturing - Capital Programs and Industry Operations

Nov 8, 2010

James Porter

Smart Process Manufacturing (SPM) is a dramatically intensified knowledge-enabled industrial enterprise in which ALL business and operating actions are executed to achieve substantially enhanced energy, sustainability, environmental, safety and economic performance. When SPM is applied...

Petascale High-Fidelity Simulation of Turbulent Reactive Flows: Challenges and Opportunities

Nov 8, 2010

Jacqueline H. Chen

The rapid growth in computing power has presented both opportunities and challenges for high-fidelity simulations of turbulent reacting flows. The advent of petascale supercomputers has made it possible to glean fundamental physical insight into fine-grained ‘turbulence-chemistry' interactions in...

Inventing a New America through Discovery and Innovation in Science, Engineering and Medicine

Nov 8, 2010

Peter T. Cummings, Sharon C. Glotzer

Simulation-Based Engineering and Science (SBE&S) involves the use of computer modeling and simulation to solve mathematical formulations of physical models of engineered and natural systems. The impacts of SBE&S can be observed in critical industries, such as pharmaceuticals,medical imaging...

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