Materials Transportation Testing & Analysis at Sandia National Laboratories

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Thermal Analysis

Carlos Lopez, (505) 845-9545

Thermal analysis is the study, calculation, and interpretation of problems in which temperature or its effect is of interest. An example of this kind of a problem could be the determination of how long it takes for the center of an object to get to a certain temperature or what is the temperature at a specific location within the object after it is been exposed to a fire for a period of time. Through thermal analysis we can also quantify the amount of energy transfer during thermal processes like the ones mentioned above as well as characterize how an object reacts when exposed to different thermal environments.

Patran/P-Thermal thermal analysis code
Description Patran is a mesh (model) generator P-Thermal (Qtran) is a commercial resistor-capacitor network code	Applications NUREG 0170 rework Modal study revision CLWR Tritium study Package design (ONC, EONC, BUSS Cask) Modeling for web sites, communications with "stakeholders" (SAF-T) proposal Tractor/Trailer thermal design analyses Design of calorimeter for sensitivity analysis for flash tube NDT applications	Example Click to view picture
CFX computational fluid dynamics code
Description Calculates fluid flow, conduction and radiation simultaneously Calculates convection heat transfer from flow solution Conduction capabilities are limited	Applications Ship fire scenarios (SeaRAM and JNC) Modal study revision Spent fuel rod bundles: modal study rework 3-D pool fire modeling Risk studies	Example Click to view picture
Container Analysis Fire Environment (CAFE) model
Description Provides realistic fire boundary conditions based on first principles Is a set of user routines integrated with P-thermal commercial code Can run cases in a few hours	Applications Package design analysis Risk studies - NUREG 0170 revision, modal study revision, etc. Public communications (fire graphics) Experiment design (University of Nevada, Reno collaboration)	Example Click to view picture
Sandia One-Dimensional Direct and Inverse Thermal (SODDIT) code
Description Inverse solution: solves for boundary conditions given interior temperature history Allows estimation of surface heat transfer in experiments	Applications Estimating fire conditions from instrumented Type B packages Estimating heat transfer to simulated packages for research (UNR collaboration, SeaRAM experiments)	Example Click to view picture