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Title: Response Surface Modeling Tool Suite, Version 1.x

Abstract

The Response Surface Modeling (RSM) Tool Suite is a collection of three codes used to generate an empirical interpolation function for a collection of drag coefficient calculations computed with Test Particle Monte Carlo (TPMC) simulations. The first code, "Automated RSM", automates the generation of a drag coefficient RSM for a particular object to a single command. "Automated RSM" first creates a Latin Hypercube Sample (LHS) of 1,000 ensemble members to explore the global parameter space. For each ensemble member, a TPMC simulation is performed and the object drag coefficient is computed. In the next step of the "Automated RSM" code, a Gaussian process is used to fit the TPMC simulations. In the final step, Markov Chain Monte Carlo (MCMC) is used to evaluate the non-analytic probability distribution function from the Gaussian process. The second code, "RSM Area", creates a look-up table for the projected area of the object based on input limits on the minimum and maximum allowed pitch and yaw angles and pitch and yaw angle intervals. The projected area from the look-up table is used to compute the ballistic coefficient of the object based on its pitch and yaw angle. An accurate ballistic coefficient is crucial in accuratelymore » computing the drag on an object. The third code, "RSM Cd", uses the RSM generated by the "Automated RSM" code and the projected area look-up table generated by the "RSM Area" code to accurately compute the drag coefficient and ballistic coefficient of the object. The user can modify the object velocity, object surface temperature, the translational temperature of the gas, the species concentrations of the gas, and the pitch and yaw angles of the object. Together, these codes allow for the accurate derivation of an object's drag coefficient and ballistic coefficient under any conditions with only knowledge of the object's geometry and mass.« less

Authors:
;
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1310545
Report Number(s):
RSM; 004856MLTPL00
C15006
DOE Contract Number:
AC52-06NA25396
Resource Type:
Software
Software Revision:
00
Software Package Number:
004856
Software CPU:
MLTPL
Open Source:
Yes
Open source under GPL v2
Source Code Available:
Yes
Country of Publication:
United States

Citation Formats

Walker, Andrew, and Lawrence, Earl. Response Surface Modeling Tool Suite, Version 1.x. Computer software. https://www.osti.gov//servlets/purl/1310545. Vers. 00. USDOE. 5 Jul. 2016. Web.
Walker, Andrew, & Lawrence, Earl. (2016, July 5). Response Surface Modeling Tool Suite, Version 1.x (Version 00) [Computer software]. https://www.osti.gov//servlets/purl/1310545.
Walker, Andrew, and Lawrence, Earl. Response Surface Modeling Tool Suite, Version 1.x. Computer software. Version 00. July 5, 2016. https://www.osti.gov//servlets/purl/1310545.
@misc{osti_1310545,
title = {Response Surface Modeling Tool Suite, Version 1.x, Version 00},
author = {Walker, Andrew and Lawrence, Earl},
abstractNote = {The Response Surface Modeling (RSM) Tool Suite is a collection of three codes used to generate an empirical interpolation function for a collection of drag coefficient calculations computed with Test Particle Monte Carlo (TPMC) simulations. The first code, "Automated RSM", automates the generation of a drag coefficient RSM for a particular object to a single command. "Automated RSM" first creates a Latin Hypercube Sample (LHS) of 1,000 ensemble members to explore the global parameter space. For each ensemble member, a TPMC simulation is performed and the object drag coefficient is computed. In the next step of the "Automated RSM" code, a Gaussian process is used to fit the TPMC simulations. In the final step, Markov Chain Monte Carlo (MCMC) is used to evaluate the non-analytic probability distribution function from the Gaussian process. The second code, "RSM Area", creates a look-up table for the projected area of the object based on input limits on the minimum and maximum allowed pitch and yaw angles and pitch and yaw angle intervals. The projected area from the look-up table is used to compute the ballistic coefficient of the object based on its pitch and yaw angle. An accurate ballistic coefficient is crucial in accurately computing the drag on an object. The third code, "RSM Cd", uses the RSM generated by the "Automated RSM" code and the projected area look-up table generated by the "RSM Area" code to accurately compute the drag coefficient and ballistic coefficient of the object. The user can modify the object velocity, object surface temperature, the translational temperature of the gas, the species concentrations of the gas, and the pitch and yaw angles of the object. Together, these codes allow for the accurate derivation of an object's drag coefficient and ballistic coefficient under any conditions with only knowledge of the object's geometry and mass.},
url = {https://www.osti.gov//servlets/purl/1310545},
doi = {},
year = 2016,
month = 7,
note =
}

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