Statistics of particle time-temperature histories :

Technical Report · Tue Oct 01 00:00:00 EDT 2013

DOI:https://doi.org/10.2172/1104703· OSTI ID:1104703

Hewson, John C.; Gin, Craig; Lignell, David O.; Sun, Guangyuan

Progress toward predictions of the statistics of particle time-temperature histories is presented. These predictions are to be made using Lagrangian particle models within the one-dimensional turbulence (ODT) model. In the present reporting period we have further characterized the performance, behavior and capabilities of the particle dispersion models that were added to the ODT model in the first period. We have also extended the capabilities in two manners. First we provide alternate implementations of the particle transport process within ODT; within this context the original implementation is referred to as the type-I and the new implementations are referred to as the type-C and type-IC interactions. Second we have developed and implemented models for two-way coupling between the particle and fluid phase. This allows us to predict the reduced rate of turbulent mixing associated with particle dissipation of energy and similar phenomena. Work in characterizing these capabilities has taken place in homogeneous decaying turbulence, in free shear layers, in jets and in channel flow with walls, and selected results are presented.

• Research Organization: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States); Brigham Young University,, Provo, UT
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 1104703
• Report Number(s): SAND2013-5500; 480725
• Country of Publication: United States
• Language: English