Title: Talk 1: Towards uncertainty modeling in high speed reacting flows
Talk 2: To intrude or not to intrude

Speaker: Talk 1 Speaker: Gianluca Iaccarino, Stanford University
Talk 2 Speaker: Paul Constantine, Stanford University 

Date/Time: August 26, 2008
Talk 1: 10:00am – 10:300am,
Talk 2: 10:30am – 11:00 am

Location: CSRI Building, Room 90 (Sandia NM)

Brief Abstract: Talk 1: The overarching goal of the PSAAP Center at Stanford is the prediction of unsteady phenomena in air-breathing hypersonic vehicles. We will present the challenges associated with the complex nature of the system and our current research directions in the area of uncertainty quantification. In particular, we will focus on the issue of model-form uncertainty introduced by phenomenological assumptions used in the physical models. The problem of interest is the shock/boundary layer interaction which is crucial to predict the performance of the propulsion system.

Talk 2: In the burgeoning field of uncertainty quantification, the methods for propagation of uncertain inputs can be broadly classified into two categories: NON-INTRUSIVE methods utilize existing deterministic solvers to approximate the statistics of the uncertain output quantities of interest, whereas INTRUSIVE methods require a reformulation of the governing equations and new solvers. We analytically compare intrusive and non-intrusive flavors of polynomial chaos based methods applied to random matrix equations in an attempt to answer the question: to intrude or not to intrude.

CSRI POC: James R. Stewart, (505) 844-8630