U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by: Ian Bell (Fed)

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 51 - 75 of 78

Modified Entropy Scaling of the Transport Properties of the Lennard-Jones Fluid

June 26, 2019
Author(s)
Ian H. Bell, Richard A. Messerly, Monika Thol, Lorenzo Costigliola, Jeppe Dyre
Separated by twenty-two years, Rosenfeld proposed two different scaling approaches to model the transport properties of fluids, one valid in the dilute gas, and another in the liquid phase. In this work, we demonstrate that these two limiting cases can be

Application of the group contribution volume translated Peng-Robinson equation of state to new commercial refrigerant mixtures

April 29, 2019
Author(s)
Ian H. Bell, Jonathan Welliquet, Maria Mondejar, Sylvain Quoilin, Ala Bazyleva, Frederik Haglind
The search of new refrigerants complying with the most recent environmental regulations must be supported by the availability of simple and reliable models for the prediction of their thermophysical behavior, both as pure substances and as mixtures. Cubic

CEGO: C++11 Evolutionary Global Optimization

April 23, 2019
Author(s)
Ian H. Bell
Global optimization is an algorithmic need that is ubiquitous throughout the natural sciences, engineering, and other technical spheres. It is a non-trivial task, particularly when the function to be optimized has many local minima and the optimization

Low-GWP Alternative Refrigerant Blends for HFC-134a

September 7, 2018
Author(s)
Piotr A. Domanski, Mark O. McLinden, Ian H. Bell, Gregory T. Linteris
The goal of this study was to identify non-flammable, non-toxic, low global-warming-potential (GWP) replacements for HFC-134a in an air-conditioning system that would maintain the energy efficiency and capacity. A prior exhaustive work demonstrated that

Bubble-Point Measurements and Modeling of Binary Mixtures of Linear Siloxanes

August 20, 2018
Author(s)
Luuc Keulen, Elisabeth Mansfield, Ian Bell, Andrea Spinelli, A. Guardone
The bubble-point pressures of three binary mixtures of linear siloxanes have been mea4 sured. The binary mixtures consist of hexamethyldisiloxane (MM) which is mixed with ei5 ther octamethyltrisiloxane (MDM), decamethyltetrasiloxane (MD2M), and

A theoretically based departure function for multi-fluid mixture models

August 15, 2018
Author(s)
Ian H. Bell, Andreas Jaeger, Cornelia Breitkopf
Multi-fluid models for highly accurate multiparameter equations of state have been applied very successfully in the past years in order to accurately model thermophysical properties of mixtures. However, the predictive capabilities of this type of mixture

ThermoData Engine

June 21, 2018
Author(s)
Vladimir Diky, Chris D. Muzny, Kenneth G. Kroenlein, Eric W. Lemmon, Ian H. Bell, Andrei F. Kazakov, Yauheni Paulechka

NISTfit: A natively multithreaded C++11 framework for model development

February 12, 2018
Author(s)
Ian H. Bell, Matthias Kunick
The current trend in computer architecture is for increasingly parallel computation while the clock frequency stagnates. The increase in computing speed is achieved by dividing a process into several threads which are executed in parallel on multiple

Uncertainty Assessment of Equations of State with Application to an Organic Rankine Cycle

July 2, 2017
Author(s)
Jerome Frutiger, Ian Bell, O'Connell J. P., Kenneth Kroenlein, Jens Abildskov, Gurkan Sin
Evaluations of equations of state (EoS) with application to process systems should include uncertainty analysis. A generic method is presented for determining such uncertainties from both the mathematical form and the data for obtaining EoS parameter

Uncertainty Assessment of Equations of State Applied to Organic Rankine Cycles

January 27, 2017
Author(s)
Ian H. Bell, Kenneth G. Kroenlein, John P. O'Connell, Jens Abildskov, Jerome Frutiger, Gurkan Sin
This study presents a generic method to analyze and select equations of state (EoS) based on detailed uncertainty analysis of the respective EoS property parameters. A Cubic EoS (i.e. Soave-Redlich-Kwong SRK) is compared to PC-SAFT EoS. The uncertainty