[CIG-ALL] CIG WEBINAR: Tomorrow Thursday Feb 11 @ 2pm 0 Najm

Lorraine Hwang ljhwang at ucdavis.edu
Wed Feb 10 10:55:29 PST 2016

10 February 2016

Dear CIG Community:

Please join us this Thursday February 11 @ 2pm PT for our second webinar in the series on verification, validation and uncertainty quantification. We are very fortunate to have Dr. Habib Najm from Sandia National Labs to be speaking to us on:
Uncertainty Quantification in Computational Models of Physical Systems

Models of physical systems typically involve inputs/parameters that are determined from empirical measurements, and therefore exhibit a certain degree of uncertainty. Estimating the propagation of this uncertainty into computational model output predictions is crucial for purposes of model validation, design optimization, and decision support.

Recent years have seen significant developments in probabilistic methods for efficient uncertainty quantification (UQ) in computational models. These methods are grounded in the use of functional representations for random variables. In particular, Polynomial Chaos (PC) expansions have seen significant use in this context. The utility of PC methods has been demonstrated in a range of physical models, including structural mechanics, porous media, fluid dynamics, aeronautics, heat transfer, and chemically reacting flow. While high-dimensionality remains a challenge, great strides have been made in dealing with moderate dimensionality along with non-linearity and dynamics.

In this talk, I will give an overview of UQ in computational models, and present associated demonstrations in computations of physical systems. I will cover the two key classes of UQ activities, namely: estimation of uncertain input parameters from empirical data, and forward propagation of parametric uncertainty to model outputs. I will cover the basics of PC UQ methods with examples of their use in both forward and inverse UQ problems. I will also highlight the application of these methods in select physical systems, including combustion, as well as ocean and land components of climate models.

You may connect to the webinar via Adobe Connect through our website or using the link below:

Please remember to check your connection prior to attending the webinar.

Miss the first webinar in this series - Dr. William Oberkampf, Oberkampf Consulting, Verification, Validation, and Predictive Capability: What’s What? ? View it on our YouTube channel:
https://www.youtube.com/user/CIGeodynamics <https://www.youtube.com/user/CIGeodynamics>
or through our website (scroll to bottom of page):
https://geodynamics.org/cig/events/webinars/ <https://geodynamics.org/cig/events/webinars/> 


Lorraine Hwang, Ph.D.
Associate Director, CIG

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