Publications

Carpenter, John H.; Robinson, Allen C.; Debusschere, Bert D.; Wills, Ann E.

Abstract not provided.

Robinson, Allen C.; Debusschere, Bert D.; Carpenter, John H.

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Carpenter, John H.; Robinson, Allen C.; Wills, Ann E.; Debusschere, Bert D.

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Debusschere, Bert D.; Carpenter, John H.; Robinson, Allen C.; Wills, Ann E.

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Carpenter, John H.; Robinson, Allen C.; Wills, Ann E.; Drake, Richard R.; Rider, William J.; Debusschere, Bert D.

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Robinson, Allen C.; Drake, Richard R.; Carpenter, John H.; Lemke, Raymond W.; Wills, Ann E.

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Robinson, Allen C.; Drake, Richard R.; Carpenter, John H.; Wills, Ann E.; Rider, William J.; Debusschere, Bert D.

Abstract not provided.

Mattsson, Thomas M.; Cochrane, Kyle C.; Root, Seth R.; Carpenter, John H.

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Robinson, Allen C.; Petney, Sharon P.; Drake, Richard R.; Weirs, Vincent G.; Adams, Brian M.; Vigil, Dena V.; Carpenter, John H.; Garasi, Christopher J.; Wong, Michael K.; Robbins, Joshua R.; Siefert, Christopher S.; Strack, Otto E.; Wills, Ann E.; Trucano, Timothy G.; Bochev, Pavel B.; Summers, Randall M.; Stewart, James R.; Ober, Curtis C.; Rider, William J.; Haill, Thomas A.; Lemke, Raymond W.; Cochrane, Kyle C.; Desjarlais, Michael P.; Love, Edward L.; Voth, Thomas E.; Mosso, Stewart J.; Niederhaus, John H.

Abstract not provided.

Computers and Fluids

Robinson, Allen C.; Berry, Robert D.; Carpenter, John H.; Debusschere, Bert D.; Drake, Richard R.; Mattsson, A.E.; Rider, William J.

Uncertainty quantification (UQ) deals with providing reasonable estimates of the uncertainties associated with an engineering model and propagating them to final engineering quantities of interest. We present a conceptual UQ framework for the case of shock hydrodynamics with Euler's equations where the uncertainties are assumed to lie principally in the equation of state (EOS). In this paper we consider experimental data as providing both data and an estimate of data uncertainty. We propose a specific Bayesian inference approach for characterizing EOS uncertainty in thermodynamic phase space. We show how this approach provides a natural and efficient methodology for transferring data uncertainty to engineering outputs through an EOS representation that understands and deals consistently with parameter correlations as sensed in the data.Historically, complex multiphase EOSs have been built utilizing tables as the delivery mechanism in order to amortize the cost of creation of the tables over many subsequent continuum scale runs. Once UQ enters into the picture, however, the proper operational paradigm for multiphase tables become much less clear. Using a simple single-phase Mie-Grüneisen model we experiment with several approaches and demonstrate how uncertainty can be represented. We also show how the quality of the tabular representation is of key importance. As a first step, we demonstrate a particular tabular approach for the Mie-Grüneisen model which when extended to multiphase tables should have value for designing a UQ-enabled shock hydrodynamic modeling approach that is not only theoretically sound but also robust, useful, and acceptable to the modeling community. We also propose an approach to separate data uncertainty from modeling error in the EOS. © 2012 Elsevier Ltd.

Carpenter, John H.; Wills, Ann E.; Rider, William J.; Debusschere, Bert D.; Robinson, Allen C.; Drake, Richard R.

Abstract not provided.

Carpenter, John H.; Belcourt, Kenneth N.

Completion of the CASL L3 milestone THM.CFD.P7.04 provides a general purpose tabular interpolation library for material properties to support, in particular, standardized models for steam properties. The software consists of three parts, implementations of analytic steam models, a code to generate tables from those models, and an interpolation package to interface the tables to CFD codes such as Hydra-TH. Verification of the standard model is maintained through the entire train of routines. The performance of interpolation package exceeds that of freely available analytic implementation of the steam properties by over an order of magnitude.

Carpenter, John H.; Robinson, Allen C.; Debusschere, Bert D.; Wills, Ann E.; Drake, Richard R.; Rider, William J.

Abstract not provided.

Carpenter, John H.; Belcourt, Kenneth N.

Completion of the CASL L3 milestone THM.CFD.P6.03 provides a tabular material properties capability to the Hydra code. A tabular interpolation package used in Sandia codes was modified to support the needs of multi-phase solvers in Hydra. Use of the interface is described. The package was released to Hydra under a government use license. A dummy physics was created in Hydra to prototype use of the interpolation routines. Finally, a test using the dummy physics verifies the correct behavior of the interpolation for a test water table. 3

Carpenter, John H.; Wills, Ann E.; Rider, William J.; Debusschere, Bert D.; Robinson, Allen C.; Drake, Richard R.

Abstract not provided.

Root, Seth R.; Cochrane, Kyle C.; Carpenter, John H.; Mattsson, Thomas M.

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Carpenter, John H.; Wills, Ann E.; Rider, William J.; Debusschere, Bert D.; Robinson, Allen C.; Drake, Richard R.

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Carpenter, John H.

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Carpenter, John H.

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Carpenter, John H.; Robinson, Allen C.; Rider, William J.; Wills, Ann E.; Debusschere, Bert D.; Drake, Richard R.

Abstract not provided.

Root, Seth R.; Carpenter, John H.; Cochrane, Kyle C.; Mattsson, Thomas M.

Abstract not provided.

Carpenter, John H.; Wills, Ann E.; Rider, William J.; Debusschere, Bert D.; Robinson, Allen C.; Drake, Richard R.

Abstract not provided.

Carpenter, John H.; Robinson, Allen C.; Debusschere, Bert D.; Drake, Richard R.; Wills, Ann E.; Rider, William J.

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Carpenter, John H.; Root, Seth R.; Cochrane, Kyle C.; Flicker, Dawn G.; Mattsson, Thomas M.

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Root, Seth R.; Magyar, Rudolph J.; Cochrane, Kyle C.; Carpenter, John H.; Shulenburger, Luke N.; Mattsson, Thomas M.

Abstract not provided.