RT Journal Article ID 081ed48212497a71 A1 Weirs, V. Gregory A1 Fabian, Nathan A1 Potter, Kristin A1 McNamara, Laura A1 Otahal, Thomas T1 UNCERTAINTY IN THE DEVELOPMENT AND USE OF EQUATION OF STATE MODELS JF International Journal for Uncertainty Quantification JO IJUQ YR 2013 FD 2012-12-06 VO 3 IS 3 SP 255 OP 270 K1 materials K1 uncertainty quantification K1 representation of uncertainty K1 model validation and verification K1 continnum mechanics AB In this paper we present the results from a series of focus groups on the visualization of uncertainty in equation-of-state (EOS) models. The initial goal was to identify the most effective ways to present EOS uncertainty to analysts, code developers, and material modelers. Four prototype visualizations were developed to present EOS surfaces in a three-dimensional, thermodynamic space. Focus group participants, primarily from Sandia National Laboratories, evaluated particular features of the various techniques for different use cases and discussed their individual workflow processes, experiences with other visualization tools, and the impact of uncertainty on their work. Related to our prototypes, we found the 3D presentations to be helpful for seeing a large amount of information at once and for a big-picture view; however, participants also desired relatively simple, two-dimensional graphics for better quantitative understanding and because these plots are part of the existing visual language for material models. In addition to feedback on the prototypes, several themes and issues emerged that are as compelling as the original goal and will eventually serve as a starting point for further development of visualization and analysis tools. In particular, a distributed workflow centered around material models was identified. Material model stakeholders contribute and extract information at different points in this workflow depending on their role, but encounter various institutional and technical barriers which restrict the flow of information. An effective software tool for this community must be cognizant of this workflow and alleviate the bottlenecks and barriers within it. Uncertainty in EOS models is defined and interpreted differently at the various stages of the workflow. In this context, uncertainty propagation is difficult to reduce to the mathematical problem of estimating the uncertainty of an output from uncertain inputs. PB Begell House LK https://www.dl.begellhouse.com/journals/52034eb04b657aea,2c3d9a3c1f471d44,081ed48212497a71.html